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Doan UTT, Le DK, Huynh TL, Ngo TT, Vo TQ, Thi MTT, Pham ATT, Tran VC, Nguyen PT, Pham NK. Tuned Transport Path of Perovskite MAPbI 3 -based Memristor Structure. Chemphyschem 2023; 24:e202300210. [PMID: 37394623 DOI: 10.1002/cphc.202300210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/04/2023]
Abstract
In this study, the features of resistive random access memory (RRAM) employing a straightforward Cr/MAPbI3 /FTO three-layer structure have been examined and clarified. The device displays various resistance switching (RS) behavior at various sweep voltages between 0.5 and 5 V. The RS effect has a conversion in the direction of the SET and RESET processes during sweeping for a number of cycles at a specific voltage. The directional change of the RS processes corresponds to the dominant transition between the generation/recombination of iodide ion and vacancy in the MAPbI3 perovskite layer and the electrochemical metallization of the Cr electrode under the influence of an electric field, which results in the conductive filament (CF) formation/rupture. At each stage, these processes are controlled by specific charge conduction mechanisms, including Ohmic conduction, space-charge-limited conduction (SCLC), and variable-range hopping (VRH). By identifying the biased voltage and the quantity of voltage sweep cycles, one can take a new approach to control or modulate the pathways for effective charge transport. This new approach is made possible by an understanding of the RS characteristics and the corresponding mechanisms causing the variation of RS behavior in the structure.
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Affiliation(s)
- Uyen Tu Thi Doan
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
- Laboratory of Advanced Materials, University of Science, Ho Chi Minh City, 70000, Vietnam
| | - Duy Khanh Le
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
| | - Truong Lam Huynh
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
| | - Tung Thanh Ngo
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
- Faculty of Chemistry, University of Science, Ho Chi Minh City, 70000, Vietnam
| | - Trieu Quang Vo
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
| | - Minh Thu Tran Thi
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
| | - Anh Tuan Thanh Pham
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
- Laboratory of Advanced Materials, University of Science, Ho Chi Minh City, 70000, Vietnam
| | - Vinh Cao Tran
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
- Laboratory of Advanced Materials, University of Science, Ho Chi Minh City, 70000, Vietnam
| | - Phuong Tuyet Nguyen
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
- Faculty of Chemistry, University of Science, Ho Chi Minh City, 70000, Vietnam
| | - Ngoc Kim Pham
- Faculty of Materials Science and Technology, University of Science, Ho Chi Minh City, 70000, Vietnam
- Vietnam National University, Ho Chi Minh City, 70000, Vietnam
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Tuan Thanh Pham A, Ai Thi Nguyen P, Kim Thi Phan Y, Huu Nguyen T, Van Hoang D, Kieu Truong Le O, Bach Phan T, Cao Tran V. Effects of B 2O 3 doping on the crystalline structure and performance of DC-magnetron-sputtered, transparent ZnO thin films. Appl Opt 2020; 59:5845-5850. [PMID: 32609712 DOI: 10.1364/ao.395051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
The transparent-conducting performance is estimated through figure-of-merit (FOM) value. To improve poor FOM value of pure ZnO thin films, boron (B) as a donor impurity was doped into the films. Direct-current magnetron sputtering was used to prepare B-doped ZnO (BZO) thin films from sintered ZnO targets with variable B2O3 content changing from 0 to 2 wt. %. The x ray diffraction analysis confirmed the preferably c-axis-oriented structure of hexagonal wurtzite ZnO host. The results also showed variation in the film structure versus the B2O3 content through calculations of crystal size and residual stress. Depending on the B2O3 content, a competition of interstitial and substitutional B3+ ions induced more stress or relaxation in lattice structure of the films. At 1% B2O3, the BZO thin film had the best crystalline characterization with the lowest stress and large crystal size. In consequence, the BZO 1% film obtained the lowest resistivity of 2.7×10-3Ωcm, average transmittance of 82.1%, and the best FOM value of 18.8×102Ω-1cm-1. The transparent-conducting performance of the ZnO thin films deposited by direct-current (DC) magnetron sputtering was significantly enhanced through B doping. The good-performance BZO film at 1% B2O3 is believed to be of use as electrodes in thin-film solar cells.
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Tran Nguyen NH, Nguyen TH, Liu YR, Aminzare M, Pham ATT, Cho S, Wong DP, Chen KH, Seetawan T, Pham NK, Ta HKT, Tran VC, Phan TB. Thermoelectric Properties of Indium and Gallium Dually Doped ZnO Thin Films. ACS Appl Mater Interfaces 2016; 8:33916-33923. [PMID: 27960402 DOI: 10.1021/acsami.6b10591] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We investigated the effect of single and multidopants on the thermoelectrical properties of host ZnO films. Incorporation of the single dopant Ga in the ZnO films improved the conductivity and mobility but lowered the Seebeck coefficient. Dual Ga- and In-doped ZnO thin films show slightly decreased electrical conductivity but improved Seebeck coefficient. The variation of thermoelectric properties is discussed in terms of film crystallinity, which is subject to the dopants' radius. Small amounts of In dopants with a large radius may introduce localized regions in the host film, affecting the thermoelectric properties. Consequently, a 1.5 times increase in power factor, three times reduction in thermal conductivity, and 5-fold enhancement in the figure of merit ZT have been achieved at 110 °C. The results also indicate that the balanced control of both electron and lattice thermal conductivities through dopant selection are necessary to attain low total thermal conductivity.
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Affiliation(s)
- Nhat Hong Tran Nguyen
- Laboratory of Advanced Materials, University of Science, Vietnam National University , HoChiMinh City, Vietnam
- Faculty of Applied Science, University of Technology, Vietnam National University , HoChiMinh City, Vietnam
| | - Truong Huu Nguyen
- Laboratory of Advanced Materials, University of Science, Vietnam National University , HoChiMinh City, Vietnam
| | - Yi-Ren Liu
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
| | - Masoud Aminzare
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
| | - Anh Tuan Thanh Pham
- Laboratory of Advanced Materials, University of Science, Vietnam National University , HoChiMinh City, Vietnam
| | - Sunglae Cho
- Department of Physics, University of Ulsan , Ulsan 13557 Korea
| | - Deniz P Wong
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
| | - Kuei-Hsien Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica , Taipei 10617, Taiwan
| | - Tosawat Seetawan
- Center of Excellence on Alternative Energy, Research Development Institute, Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University , 680 Nittayo, Mueang District, Sakon Nakhon, 74000, Thailand
| | - Ngoc Kim Pham
- Faculty of Materials Science, University of Science, Vietnam National University , HoChiMinh City, Vietnam
| | - Hanh Kieu Thi Ta
- Faculty of Materials Science, University of Science, Vietnam National University , HoChiMinh City, Vietnam
| | - Vinh Cao Tran
- Laboratory of Advanced Materials, University of Science, Vietnam National University , HoChiMinh City, Vietnam
| | - Thang Bach Phan
- Laboratory of Advanced Materials, University of Science, Vietnam National University , HoChiMinh City, Vietnam
- Faculty of Materials Science, University of Science, Vietnam National University , HoChiMinh City, Vietnam
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