1
|
Korath Shivan S, Maier A, Scheele M. Emergent properties in supercrystals of atomically precise nanoclusters and colloidal nanocrystals. Chem Commun (Camb) 2022; 58:6998-7017. [DOI: 10.1039/d2cc00778a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We provide a comprehensive account of the optical, electrical and mechanical properties that result from the self-assembly of colloidal nanocrystals or atomically precise nanoclusters into crystalline arrays with long-range order....
Collapse
|
2
|
Grassl F, Ullrich A, Mansour AE, Abdalbaqi SM, Koch N, Opitz A, Scheele M, Brütting W. Coupled Organic-Inorganic Nanostructures with Mixed Organic Linker Molecules. ACS APPLIED MATERIALS & INTERFACES 2021; 13:37483-37493. [PMID: 34328310 DOI: 10.1021/acsami.1c08614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The electronic properties of semiconducting inorganic lead sulfide (PbS) nanocrystals (NCs) and organic linker molecules are dependent on the size of NCs as well as the used ligands. Here, we demonstrate that a weakly binding ligand can be successfully attached to PbS NCs to form a coupled organic-inorganic nanostructure (COIN) by mixing with a strong binding partner. We use the weakly binding zinc β-tetraaminophthalocyanine (Zn4APc) in combination with the strongly binding 1,2-ethanedithiol (EDT) as a mixed ligand system and compare its structural, electronic, and (photo-)electrical properties with both single-ligand COINs. It is found that binding of Zn4APc is assisted by the presence of EDT leading to improved film homogeneity, lower trap density, and enhanced photocurrent of the derived devices. Thus, the mixing of ligands is a versatile tool to achieve COINs with improved performance.
Collapse
Affiliation(s)
- Florian Grassl
- Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany
| | - Aladin Ullrich
- Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany
| | - Ahmed E Mansour
- Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | | | - Norbert Koch
- Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Andreas Opitz
- Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Marcus Scheele
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | | |
Collapse
|
3
|
Xia P, Davies DW, Patel BB, Qin M, Liang Z, Graham KR, Diao Y, Tang ML. Spin-coated fluorinated PbS QD superlattice thin film with high hole mobility. NANOSCALE 2020; 12:11174-11181. [PMID: 32406467 DOI: 10.1039/d0nr02299c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Motivated by the oleophobic and electron-withdrawing nature of perfluorocarbons, we explore the effect of a trifluoromethyl coating on lead sulfide quantum dots (PbS QDs) in thin film transistor (TFT) geometry. The low surface energy conferred by the oleophobic perfluorocarbons creates QDs packed in a primitive cubic lattice with long range order, as confirmed by grazing incidence small angle X-ray scattering (GISAXS) and transmission electron microscopy (TEM). Hole mobilities as high as 0.085 cm2 V-1 s-1 were measured in the TFTs. No electron transport was observed. This suggests that the electron-withdrawing nature of the trifluoromethyl ligand is eclipsed by the excess holes present in the PbS QDs that likely stem from cation vacancies induced by the thiol group.
Collapse
Affiliation(s)
- Pan Xia
- Department of Chemistry & Materials Science and Engineering Program, University of California, Riverside, 900 University Avenue, Riverside, California 92521, USA.
| | - Daniel W Davies
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA
| | - Bijal B Patel
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA
| | - Maotong Qin
- Department of Materials Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, NO. 96 Jinzhai Road, Hefei, Anhui, 230026 P. R. China
| | - Zhiming Liang
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Ying Diao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, USA
| | - Ming Lee Tang
- Department of Chemistry & Materials Science and Engineering Program, University of California, Riverside, 900 University Avenue, Riverside, California 92521, USA.
| |
Collapse
|
4
|
Yazdani N, Jansen M, Bozyigit D, Lin WMM, Volk S, Yarema O, Yarema M, Juranyi F, Huber SD, Wood V. Nanocrystal superlattices as phonon-engineered solids and acoustic metamaterials. Nat Commun 2019; 10:4236. [PMID: 31530815 PMCID: PMC6748911 DOI: 10.1038/s41467-019-12305-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 08/28/2019] [Indexed: 11/29/2022] Open
Abstract
Phonon engineering of solids enables the creation of materials with tailored heat-transfer properties, controlled elastic and acoustic vibration propagation, and custom phonon-electron and phonon-photon interactions. These can be leveraged for energy transport, harvesting, or isolation applications and in the creation of novel phonon-based devices, including photoacoustic systems and phonon-communication networks. Here we introduce nanocrystal superlattices as a platform for phonon engineering. Using a combination of inelastic neutron scattering and modeling, we characterize superlattice-phonons in assemblies of colloidal nanocrystals and demonstrate that they can be systematically engineered by tailoring the constituent nanocrystals, their surfaces, and the topology of superlattice. This highlights that phonon engineering can be effectively carried out within nanocrystal-based devices to enhance functionality, and that solution processed nanocrystal assemblies hold promise not only as engineered electronic and optical materials, but also as functional metamaterials with phonon energy and length scales that are unreachable by traditional architectures.
Collapse
Affiliation(s)
- Nuri Yazdani
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Maximilian Jansen
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Deniz Bozyigit
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Weyde M M Lin
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Sebastian Volk
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Olesya Yarema
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Maksym Yarema
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland
| | - Fanni Juranyi
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
| | - Sebastian D Huber
- Institute for Theoretical Physics, ETH Zurich, 8093, Zürich, Switzerland
| | - Vanessa Wood
- Materials and Device Engineering Group, Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, CH-8092, Switzerland.
| |
Collapse
|
5
|
Marino E, Balazs DM, Crisp RW, Hermida-Merino D, Loi MA, Kodger TE, Schall P. Controlling Superstructure-Property Relationships via Critical Casimir Assembly of Quantum Dots. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:13451-13457. [PMID: 31205576 PMCID: PMC6558640 DOI: 10.1021/acs.jpcc.9b02033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/26/2019] [Indexed: 05/17/2023]
Abstract
The assembly of colloidal quantum dots (QDs) into dense superstructures holds great promise for the development of novel optoelectronic devices. Several assembly techniques have been explored; however, achieving direct and precise control over the interparticle potential that controls the assembly has proven to be challenging. Here, we exploit the application of critical Casimir forces to drive the growth of QDs into superstructures. We show that the exquisite temperature-dependence of the critical Casimir potential offers new opportunities to control the assembly process and morphology of the resulting QD superstructures. The direct assembly control allows us to elucidate the relation between structural, optical, and conductive properties of the critical Casimir-grown QD superstructures. We find that the choice of the temperature setting the interparticle potential plays a central role in maximizing charge percolation across QD thin-films. These results open up new directions for controlling the assembly of nanostructures and their optoelectronic properties.
Collapse
Affiliation(s)
- Emanuele Marino
- Van
der Waals—Zeeman Institute, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Daniel M. Balazs
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ryan W. Crisp
- Chemical
Engineering, Optoelectronic Materials, Delft
University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | | | - Maria A. Loi
- Zernike
Institute for Advanced Materials, University
of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Thomas E. Kodger
- Van
der Waals—Zeeman Institute, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Physical
Chemistry and Soft Matter, Wageningen University
& Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Peter Schall
- Van
der Waals—Zeeman Institute, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- E-mail:
| |
Collapse
|
6
|
Garoz‐Ruiz J, Perales‐Rondon JV, Heras A, Colina A. Spectroelectrochemistry of Quantum Dots. Isr J Chem 2019. [DOI: 10.1002/ijch.201900028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jesus Garoz‐Ruiz
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| | - Juan V. Perales‐Rondon
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| | - Aranzazu Heras
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| | - Alvaro Colina
- Department of ChemistryUniversidad de Burgos Pza. Misael Bañuelos s/n E-09001 Burgos Spain
| |
Collapse
|
7
|
Weber M, Westendorf S, Märker B, Braun K, Scheele M. Opportunities and challenges for electrochemistry in studying the electronic structure of nanocrystals. Phys Chem Chem Phys 2019; 21:8992-9001. [DOI: 10.1039/c9cp00301k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We review the state-of-the-art of determining the electronic structure of nanocrystals in thin films by electrochemistry and emphasize the benefits of correlating electrochemical with spectroscopic methods to this end.
Collapse
Affiliation(s)
- Michelle Weber
- Institute of Physical and Theoretical Chemistry
- University of Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Sophia Westendorf
- Institute of Physical and Theoretical Chemistry
- University of Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Björn Märker
- Institute of Physical and Theoretical Chemistry
- University of Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Kai Braun
- Institute of Physical and Theoretical Chemistry
- University of Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Marcus Scheele
- Institute of Physical and Theoretical Chemistry
- University of Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| |
Collapse
|
8
|
Abstract
From a niche field over 30 years ago, quantum dots (QDs) have developed into viable materials for many commercial optoelectronic devices. We discuss the advancements in Pb-based QD solar cells (QDSCs) from a viewpoint of the pathways an excited state can take when relaxing back to the ground state. Systematically understanding the fundamental processes occurring in QDs has led to improvements in solar cell efficiency from ~3% to over 13% in 8 years. We compile data from ~200 articles reporting functioning QDSCs to give an overview of the current limitations in the technology. We find that the open circuit voltage limits the device efficiency and propose some strategies for overcoming this limitation.
Collapse
|