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Zhou M, Zhang C, He C, Li J, Ouyang T, Tang C, Zhong J. Novel BiOI/LaOXI〈IX〉 heterojunction with enhanced visible-light driven photocatalytic performance: unveiling the mechanism of interlayer electron transition. Phys Chem Chem Phys 2024; 26:19450-19459. [PMID: 38973666 DOI: 10.1039/d4cp01195c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
Improving visible light absorption plays an important role in the utilization of solar power for photocatalysis. Using first-principles calculations within the HSE06 functional, we propose that the semiconductor heterojunction BiOI/LaOXI〈IX〉 extends the optical absorption to the near-infrared range, boosts the absorption coefficient from 1.28 × 105 cm-1 to above 2.20 × 105 cm-1 in the visible light range, and increases the conversion efficiency of solar power up to 9.48%. The enhanced optical absorption derives from the significant interlayer transition and excitonic effect which benefit from polarized LaOXI with a flat band in the highest valence band (VB). In BiOI/LaOClI〈ICl 〉, the electrostatic potential difference (ΔΦ) modifies the band edge positions to meet the requirements for photocatalytic overall water splitting, while the polarized electric field (Ep) accelerates the separation of photogenerated carriers and regulates the overpotentials of photogenerated carriers following a direct Z-scheme strategy. In addition, BiOI/LaOXI〈IX〉 is dynamically and thermodynamically stable. Furthermore, only a low external potential is needed to drive the redox reaction. Our theoretical results suggest that BiOI/LaOXI〈IX〉 could be a potential photocatalyst for overall water splitting with enhanced visible light absorption.
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Affiliation(s)
- Mengshi Zhou
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
| | - Chunxiao Zhang
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo, Shandong 255100, People's Republic of China
| | - Chaoyu He
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
| | - Jin Li
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
| | - Tao Ouyang
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
| | - Chao Tang
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
| | - Jianxin Zhong
- Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Laboratory for Quantum Engineering and Micro-Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, People's Republic of China.
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Demyanov GS, Fokin VB, Knyazev DV, Minakov DV, Paramonov MA, Levashov PR. How to read optical properties of matter via the Kubo-Greenwood approach. Phys Rev E 2023; 108:L053301. [PMID: 38115528 DOI: 10.1103/physreve.108.l053301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 11/03/2023] [Indexed: 12/21/2023]
Abstract
Substances with a complex electronic structure exhibit non-Drude optical properties that are challenging to interpret experimentally and theoretically. In our recent paper [Phys. Rev. E 105, 035307 (2022)2470-004510.1103/PhysRevE.105.035307], we offered a computational method based on the continuous Kubo-Greenwood formula, which expresses dynamic conductivity as an integral over the electron spectrum. In this Letter, we propose a methodology to analyze the complex conductivity using liquid Zr as an example to explain its nontrivial behavior. To achieve this, we apply the continuous Kubo-Greenwood formula and extend it to include the imaginary part of the complex conductivity into the analysis. Our method is suitable for a wide range of substances, providing an opportunity to explain optical properties from ab initio calculations of any difficulty.
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Affiliation(s)
- G S Demyanov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
| | - V B Fokin
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
| | - D V Knyazev
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
| | - D V Minakov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
| | - M A Paramonov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
| | - P R Levashov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia
- Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141701, Russia
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Li Z, Ma X, Pan H, Chu H, Pan Z, Li Y, Zhao S, Li D. Optical absorption of bismuthene with a single vacancy: first-principle calculations. OPTICS EXPRESS 2023; 31:19666-19674. [PMID: 37381377 DOI: 10.1364/oe.493962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/17/2023] [Indexed: 06/30/2023]
Abstract
The exceptional mechanical, electronic, topological, and optical properties, make bismuthene an ideal candidate for various applications in ultrafast saturation absorption and spintronics. Despite the extensive research efforts devoted to synthesizing this material, the introduction of defects, which can significantly affect its properties, remains a substantial obstacle. In this study, we investigate the transition dipole moment and joint density of states of bismuthene with/without single vacancy defect via energy band theory and interband transition theory. It is demonstrated that the existence of the single defect enhances the dipole transition and joint density of states at lower photon energies, ultimately resulting in an additional absorption peak in the absorption spectrum. Our results suggest that the manipulation of defects in bismuthene has enormous potential for improving the optoelectronic properties of this material.
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Demyanov GS, Knyazev DV, Levashov PR. Continuous Kubo-Greenwood formula: Theory and numerical implementation. Phys Rev E 2022; 105:035307. [PMID: 35428130 DOI: 10.1103/physreve.105.035307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
In this paper, we present the so-called continuous Kubo-Greenwood formula intended for the numerical calculation of the dynamic Onsager coefficients and, in particular, the real part of dynamic electrical conductivity. In contrast to the usual Kubo-Greenwood formula, which contains the summation over a discrete set of transitions between electron energy levels, the continuous one is formulated as an integral over the whole energy range. This integral includes the continuous functions: the smoothed squares of matrix elements, D(ɛ,ɛ+ℏω), the densities of state, g(ɛ)g(ɛ+ℏω), and the difference of the Fermi weights, [f(ɛ)-f(ɛ+ℏω)]/(ℏω). The function D(ɛ,ɛ+ℏω) is obtained via the specially developed smoothing procedure. From the theoretical point of view, the continuous formula is an alternative to the usual one. Both can be used to calculate matter properties and produce close results. However, the continuous formula includes the smooth functions that can be plotted and examined. Thus, we can analyze the contributions of various parts of the electron spectrum to the obtained properties. The possibility of such analysis is the main advantage of the continuous formula. The continuous Kubo-Greenwood formula is implemented in the parallel code cubogram. Using the code we demonstrate the influence of technical parameters on the simulation results for liquid aluminum. We also analyze various methods of matrix elements computation and their effect on dynamic electrical conductivity.
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Affiliation(s)
- G S Demyanov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia and Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141700, Russia
| | - D V Knyazev
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia and Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141700, Russia
| | - P R Levashov
- Joint Institute for High Temperatures, Izhorskaya 13 Building 2, Moscow 125412, Russia and Moscow Institute of Physics and Technology, Institutskiy Pereulok 9, Dolgoprudny, Moscow Region 141700, Russia
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Menzel D, Tejada A, Al-Ashouri A, Levine I, Guerra JA, Rech B, Albrecht S, Korte L. Revisiting the Determination of the Valence Band Maximum and Defect Formation in Halide Perovskites for Solar Cells: Insights from Highly Sensitive Near-UV Photoemission Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2021; 13:43540-43553. [PMID: 34472345 DOI: 10.1021/acsami.1c10171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Using advanced near-UV photoemission spectroscopy (PES) in constant final state mode (CFSYS) with a very high dynamic range, we investigate the triple-cation lead halide perovskite Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3 and gain detailed insights into the density of occupied states (DOS) in the valence band and band gap. A valence band model is established which includes the parabolic valence band edge and an exponentially decaying band tail in a single equation. This allows us to precisely determine two valence band maxima (VBM) at different k-vectors in the angle-integrated spectra, where the highest one, resulting from the VBM at the R-point in the Brillouin zone, is found between -1.50 to -1.37 eV relative to the Fermi energy EF. We investigate quantitatively the formation of defect states in the band gap up to EF upon decomposition of the perovskites during sample transfer, storage, and measurements: during near-UV-based PES, the density of defect states saturates at a value that is around 4 orders of magnitude below the density of states at the valence band edge. However, even short air exposure, or 3 h of X-ray illumination, increased their density by almost a factor of six and ∼40, respectively. Upon prolonged storage in vacuum, the formation of a distinct defect peak is observed. Thus, near-UV CFSYS with modeling as shown here is demonstrated as a powerful tool to characterize the valence band and quantify defect states in lead halide perovskites.
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Affiliation(s)
- Dorothee Menzel
- Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
| | - Alvaro Tejada
- Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
- Departamento de Ciencias, Sección Física, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, 15088 Lima, Peru
| | - Amran Al-Ashouri
- Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
| | - Igal Levine
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
| | - Jorge Andres Guerra
- Departamento de Ciencias, Sección Física, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, 15088 Lima, Peru
| | - Bernd Rech
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Scientific Management, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
- Faculty IV-Electrical Engineering and Computer Science, Technical University Berlin, Marchstraße 23, 10587 Berlin, Germany
| | - Steve Albrecht
- Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
- Faculty IV-Electrical Engineering and Computer Science, Technical University Berlin, Marchstraße 23, 10587 Berlin, Germany
| | - Lars Korte
- Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
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New quaternary thallium indium germanium selenide TlInGe 2 Se 6 : Crystal and electronic structure. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.07.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Mistrik J, Kasap S, Ruda HE, Koughia C, Singh J. Optical Properties of Electronic Materials: Fundamentals and Characterization. SPRINGER HANDBOOK OF ELECTRONIC AND PHOTONIC MATERIALS 2017. [DOI: 10.1007/978-3-319-48933-9_3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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8
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Woomer AH, Farnsworth TW, Hu J, Wells RA, Donley CL, Warren SC. Phosphorene: Synthesis, Scale-Up, and Quantitative Optical Spectroscopy. ACS NANO 2015; 9:8869-84. [PMID: 26256770 DOI: 10.1021/acsnano.5b02599] [Citation(s) in RCA: 209] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Phosphorene, a two-dimensional (2D) monolayer of black phosphorus, has attracted considerable theoretical interest, although the experimental realization of monolayer, bilayer, and few-layer flakes has been a significant challenge. Here, we systematically survey conditions for liquid exfoliation to achieve the first large-scale production of monolayer, bilayer, and few-layer phosphorus, with exfoliation demonstrated at the 10 g scale. We describe a rapid approach for quantifying the thickness of 2D phosphorus and show that monolayer and few-layer flakes produced by our approach are crystalline and unoxidized, while air exposure leads to rapid oxidation and the production of acid. With large quantities of 2D phosphorus now available, we perform the first quantitative measurements of the material's absorption edge-which is nearly identical to the material's band gap under our experimental conditions-as a function of flake thickness. Our interpretation of the absorbance spectrum relies on an analytical method introduced in this work, allowing the accurate determination of the absorption edge in polydisperse samples of quantum-confined semiconductors. Using this method, we found that the band gap of black phosphorus increased from 0.33 ± 0.02 eV in bulk to 1.88 ± 0.24 eV in bilayers, a range that is larger than that of any other 2D material. In addition, we quantified a higher-energy optical transition (VB-1 to CB), which changes from 2.0 eV in bulk to 3.23 eV in bilayers. This work describes several methods for producing and analyzing 2D phosphorus while also yielding a class of 2D materials with unprecedented optoelectronic properties.
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Affiliation(s)
- Adam H Woomer
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
| | - Tyler W Farnsworth
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
| | - Jun Hu
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
| | - Rebekah A Wells
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
| | - Carrie L Donley
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
| | - Scott C Warren
- Department of Chemistry, ‡Chapel Hill Analytical and Nanofabrication Laboratory, and §Department of Applied Physical Sciences, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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Jiang L, Lyou JH, Rane S, Schiff EA, Wang Q, Yuan Q. Open-Circuit Voltage Physics in Amorphous Silicon Solar Cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-609-a18.3] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe have performed computer calculations to explore effects of the p/i interface on the open-circuit voltage in a-Si:H based pin solar cells. The principal conclusions are that interface limitation can occur for values of VOC significantly below the built-in potential VBI of a cell, and that the effects can be understood in terms of thermionic emission of electrons from the intrinsic layer into the p-layer. We compare measurements of VOC and electroabsorption estimates of VBI with the model calculations. We conclude that p/i interface limitation is important for current a-Si:H based cells, and that the conduction band offset between the p and i layers is as important as the built-in potential for future improvements to VOC.
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10
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Jackson WB, Johnson NM. Comparison of the Optical Cross Section for the Si Dangling Bond in a- Si:H and At the c - Si/SiO2 Interface. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-46-545] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThe optical properties of the trivalent silicon dangling bond defect in hydrogenated amorphous silicon and at the Si/SiO2 interface are compared. While both defects give rise to ambipolar deep levels within the gap, significant differences in the optical properties between the two systems are found. The absorption in a-Si:H is significantly stronger and is dominated by a transition from the defect to the conduction band while the absorption at the interface is dominated by hole emission. The average dipole matrix element squared is roughly independent of energy in both systems with a magnitude of ∼30Å2. Implications of these results for optical measurements in other silicon systems are discussed.
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11
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Dawson R, Li Y, Gunes M, Heller D, Nag S, Collins R, Wronski C, Bennett M, Li Y. Optical Properties of Hydrogenated Amorphous Silicon, Silicon-Germanium and Silicon-Carbon Thin Films. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-258-595] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe optical properties of solar cell grade hydrogenated amorphous silicon (a-Si:H), silicon germanium (a-SiGe:H) and silicon carbon (a-SiC:H) alloy thin films have been investigated over a wide photon energy range (0.8–4.8 eV) using a combination of subgap photoconductivity, reflection and transmission, and spectroscopie ellipsometry techniques in order to obtain accurate optical functions for solar cell modelling. Studies on films with thicknesses ranging from a few hundred Å to a few microns show that the optical spectra obtained by the different techniques agree closely over the energy ranges of overlap and display no thickness dependence from the Urbach tail energies and above. Thus, the results appear to be free of measurement and sample related artifacts. Three different methods provide a common value for the optical gap within ±0.02 eV and the result for a-Si:H is ∼0.1 eV below the mobility gap.
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Zhu K, Yang J, Wang W, Schiff EA, Liang J, Guha S. Bandtail Limits to Solar Conversion Efficiencies in Amorphous Silicon Solar Cells. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-762-a3.2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractWe describe a model for a-Si:H based pin solar cells derived primarily from valence bandtail properties. We show how hole drift-mobility measurements and measurements of the temperature-dependence of the open-circuit voltage VOC can be used to estimate the parameters, and we present VOC(T) measurements. We compared the power density under solar illumination calculated with this model with published results for as-deposited a-Si:H solar cells. The agreement is within 4% for a range of thicknesses, suggesting that the power from as-deposited cells is close to the bandtail limit.
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Stegemann B, Sixtensson D, Lußky T, Schoepke A, Didschuns I, Rech B, Schmidt M. Ultrathin SiO(2) layers on Si(111): preparation, interface gap states and the influence of passivation. NANOTECHNOLOGY 2008; 19:424020. [PMID: 21832680 DOI: 10.1088/0957-4484/19/42/424020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An essential prerequisite for the successful application of Si/SiO(2) nanostructures in photovoltaics is the realization of well-defined and abrupt interfaces with low densities of interface gap states. Here, a complete in situ process from preparation and hydrogen passivation to interface gap state analysis by near-UV photoelectron spectroscopy without breaking ultrahigh vacuum (UHV) conditions is introduced. It is demonstrated that by RF plasma oxidation of Si(111) substrates with thermalized neutral oxygen atoms, ultrathin SiO(2) layers can be realized with compositionally and structurally abrupt Si/SiO(2) interfaces and a minimal amount of intermediate oxidation states bridging the transition from Si to SiO(2). Plasma oxidized samples have significantly lower interface gap states than samples oxidized by thermal oxidation at 850 °C. Interface gap state densities were further reduced by in situ hydrogen plasma passivation with nearly thermalized H atoms. The resulting reduction of interface recombination velocity and the increase of effective majority and minority carrier lifetimes are revealed by constant photocurrent measurements and quasi-steady-state photoconductance, respectively.
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Street RA, Biegelsen DK, Jackson WB, Johnson NM, Stutzmann M. Dopant and defect states in a-Si:H. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/13642818508240597] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- R. A. Street
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
| | - D. K. Biegelsen
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
| | - W. B. Jackson
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
| | - N. M. Johnson
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
| | - M. Stutzmann
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
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Affiliation(s)
- M. Stutzmann
- a Max-Planck-Institut für Festkörperforschung , Heisenbergstraße 1, D-7000 Stüttgart 80, F.R. Germany
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16
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Affiliation(s)
- J. Robertson
- a National Power Laboratories , Leatherhead, Surrey , KT22 7SE , England
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17
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Affiliation(s)
- R. A. Street
- a Xerox Palo Alto Research Center , Palo Alto , California , 94304 , U.S.A
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18
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Nesládek M, Meykens K, Stals LM, Vanecek M, Rosa J. Origin of characteristic subgap optical absorption in CVD diamond films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:5552-5561. [PMID: 9986517 DOI: 10.1103/physrevb.54.5552] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Dubeau J, Hamel LA, Pochet T. Radiation ionization energy in a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:10740-10750. [PMID: 9982641 DOI: 10.1103/physrevb.53.10740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Neslädek M, van ěček M, Stals LM. Defect-Induced Optical Absorption in CVD Diamond Films. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/pssa.2211540121] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Zanatta AR, Chambouleyron I. Absorption edge, band tails, and disorder of amorphous semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:3833-3836. [PMID: 9983934 DOI: 10.1103/physrevb.53.3833] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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O'Leary SK, Zukotynski S, Perz JM. Optical absorption in amorphous semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:7795-7797. [PMID: 9979756 DOI: 10.1103/physrevb.52.7795] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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O'Leary SK, Zukotynski S, Perz JM. Semiclassical density-of-states and optical-absorption analysis of amorphous semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:4143-4149. [PMID: 9979251 DOI: 10.1103/physrevb.51.4143] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Berntsen AJ, Stolk PA, Saris FW. Separating the effects of hydrogen and bond-angle variation on the amorphous-silicon band gap. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14656-14658. [PMID: 10007891 DOI: 10.1103/physrevb.48.14656] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Wraback M, Tauc J. Direct measurement of the hot carrier cooling rate in a-Si:H using femtosecond 4 eV pulses. PHYSICAL REVIEW LETTERS 1992; 69:3682-3685. [PMID: 10046886 DOI: 10.1103/physrevlett.69.3682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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26
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Zammit U, Marinelli M, Pizzoferrato R, Mercuri F. Gap-states distribution of ion-implanted Si and GaAs from subgap absorption measurements. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:7515-7518. [PMID: 10002487 DOI: 10.1103/physrevb.46.7515] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Johanson RE. Drift mobility of amorphous semiconductors measured by the traveling-wave technique. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:4089-4112. [PMID: 10002022 DOI: 10.1103/physrevb.45.4089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hamed AJ. Persistent photoconductance in doping-modulated and compensated a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:5585-5602. [PMID: 9998398 DOI: 10.1103/physrevb.44.5585] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jin S, Ley L. Hydrogen-related defects in hydrogenated amorphous semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:1066-1073. [PMID: 9999612 DOI: 10.1103/physrevb.44.1066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Band Edges and Gap States by Optical Absorption and Electron Spin Resonance in Amorphous Carbon (a-C) and Hydrogenated Amorphous Carbon (a-C:H). ACTA ACUST UNITED AC 1991. [DOI: 10.1007/978-1-4684-5967-8_26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Aljishi S, Jin S, Ley L, Wagner S. Thermal equilibration of surface defects in hydrogenated amorphous silicon-germanium alloys. PHYSICAL REVIEW LETTERS 1990; 65:629-632. [PMID: 10042972 DOI: 10.1103/physrevlett.65.629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Aljishi S, Cohen JD, Jin S, Ley L. Band tails in hydrogenated amorphous silicon and silicon-germanium alloys. PHYSICAL REVIEW LETTERS 1990; 64:2811-2814. [PMID: 10041817 DOI: 10.1103/physrevlett.64.2811] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Campbell IH, Fauchet PM, Lyon SA, Nemanich RJ. Photoluminescence above the Tauc gap in a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:9871-9879. [PMID: 9993368 DOI: 10.1103/physrevb.41.9871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Michelson CE, Cohen JD. Effects of the implantation of oxygen, nitrogen, and carbon on the density of states of n-type hydrogenated amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:1529-1541. [PMID: 9993869 DOI: 10.1103/physrevb.41.1529] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wronski CR, Lee S, Hicks M, Kumar S. Internal photoemission of holes and the mobility gap of hydrogenated amorphous silicon. PHYSICAL REVIEW LETTERS 1989; 63:1420-1423. [PMID: 10040563 DOI: 10.1103/physrevlett.63.1420] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Relationship between optical and structural properties of hydrogenated amorphous silicon. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf00618889] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mohamedi A, Thèye ML, Vergnat M, Marchal G, Piecuch M. Optical studies of bonding in coevaporated amorphous silicon-tin alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:3711-3719. [PMID: 9948693 DOI: 10.1103/physrevb.39.3711] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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McMahon TJ, Crandall RS. Hole trapping, light soaking, and secondary photocurrent transients in amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:1766-1771. [PMID: 9948393 DOI: 10.1103/physrevb.39.1766] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Solomon I, Schmidt MP, Sénémaud C. Band structure of carbonated amorphous silicon studied by optical, photoelectron, and x-ray spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:13263-13270. [PMID: 9946304 DOI: 10.1103/physrevb.38.13263] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Winer K, Hirabayashi I, Ley L. Distribution of occupied near-surface band-gap states in a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:7680-7693. [PMID: 9945495 DOI: 10.1103/physrevb.38.7680] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Winer K, Hirabayashi I, Ley L. Exponential conduction-band tail in P-doped a-Si:H. PHYSICAL REVIEW LETTERS 1988; 60:2697-2700. [PMID: 10038425 DOI: 10.1103/physrevlett.60.2697] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Winer K, Ley L. Effects of oxidation on surface band-gap states in a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:8363-8369. [PMID: 9944174 DOI: 10.1103/physrevb.37.8363] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Bose SK, Winer K, Andersen OK. Electronic properties of a realistic model of amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:6262-6277. [PMID: 9943864 DOI: 10.1103/physrevb.37.6262] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Street RA, Hack M, Jackson WB. Mechanisms of thermal equilibration in doped amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:4209-4224. [PMID: 9945059 DOI: 10.1103/physrevb.37.4209] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Branz HM, Capuder K, Lyons EH, Haggerty JS, Adler D. Conductivity and quenched-in defects in hydrogenated amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:7934-7940. [PMID: 9942590 DOI: 10.1103/physrevb.36.7934] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Winer K, Ley L. Surface states and the exponential valence-band tail in a-Si:H. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:6072-6078. [PMID: 9942290 DOI: 10.1103/physrevb.36.6072] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Smith ZE, Wagner S. Band tails, entropy, and equilibrium defects in hydrogenated amorphous silicon. PHYSICAL REVIEW LETTERS 1987; 59:688-691. [PMID: 10035845 DOI: 10.1103/physrevlett.59.688] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Vanhuyse B, Grevendonk W, Adriaenssens GJ, Dauwen J. Constant-dipole-matrix-element model for Faraday rotation in amorphous semiconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:9298-9300. [PMID: 9941335 DOI: 10.1103/physrevb.35.9298] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Eggert JR, Paul W. Midgap injection-induced absorption in amorphous silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:7993-7998. [PMID: 9941134 DOI: 10.1103/physrevb.35.7993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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