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Lee J, Kim B, Kim C, Lee MH, Kozakci I, Cho S, Kim B, Lee SY, Kim J, Oh J, Lee JY. Unlocking the Potential of Colloidal Quantum Dot/Organic Hybrid Solar Cells: Band Tunable Interfacial Layer Approach. ACS APPLIED MATERIALS & INTERFACES 2023; 15:39408-39416. [PMID: 37555937 DOI: 10.1021/acsami.3c08419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Hybrid colloidal quantum dot (CQD)/organic architectures are promising candidates for emerging optoelectronic devices having high performance and inexpensive fabrication. For unlocking the potential of CQD/organic hybrid devices, enhancing charge extraction properties at electron transport layer (ETL)/CQD interfaces is crucial. Hence, we carefully adjust the interface properties between the ETL and CQD layer by incorporating an interfacial layer for the ETL (EIL) using several types of cinnamic acid ligands. The EIL having a cascading band offset (ΔEC) between the ETL and CQD layer suppresses the potential barrier and the local charge accumulation at ETL/CQD interfaces, thereby reducing the bimolecular recombination. An optimal EIL effectively expands the depletion region that facilitates charge extraction between the ETL and CQD layer while preventing the formation of shallow traps. Representative devices with an EIL exhibit a maximum power conversion efficiency of 14.01% and retain over 80% of initial performances after 300 h under continuous maximum power point operation.
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Affiliation(s)
- Jihyung Lee
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Byeongsu Kim
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Changjo Kim
- Information and Electronics Research Institute, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Min-Ho Lee
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Irem Kozakci
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sungjun Cho
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Beomil Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sang Yeon Lee
- Information and Electronics Research Institute, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Junho Kim
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jihun Oh
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jung-Yong Lee
- School of Electrical Engineering (EE), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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Sangkhun W, Wanwong S, Wootthikanokkhan J, Sinthiptharakoon K, Kumnorkaew P. Enhanced Water Splitting Reaction Performance using TiO
2
Deposited with Graphene Quantum Dots Grafted onto Gold Nanoparticles. ChemistrySelect 2021. [DOI: 10.1002/slct.202101445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Weradesh Sangkhun
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Sompit Wanwong
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Jatuphorn Wootthikanokkhan
- Materials Technology Program School of Energy Environment and Materials King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd., Bang Mod Thung Khru Bangkok 10140 Thailand
| | - Kitiphat Sinthiptharakoon
- National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) 111 Thailand Science Park Pathum Thani 12120 Thailand
| | - Pisist Kumnorkaew
- National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency (NSTDA) 111 Thailand Science Park Pathum Thani 12120 Thailand
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Ezhilmaran B, Dhanasekar M, Bhat SV. Solution processed transparent anatase TiO 2 nanoparticles/MoO 3 nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications. NANOSCALE ADVANCES 2021; 3:1047-1056. [PMID: 36133282 PMCID: PMC9419760 DOI: 10.1039/d0na00780c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 12/17/2020] [Indexed: 05/04/2023]
Abstract
Ultraviolet (UV) photodetectors are considered as the major players in energy saving technology of the future. Efforts are needed to further develop such devices, which are capable of operating efficiently at low driving potential as well as with weak illumination. Herein, we report an all-oxide, highly transparent TiO2/MoO3 bilayer film, with nanoparticulate anatase TiO2 as the platform, fabricated by a simple solution based method and demonstrate its use in UV photodetection. Photoconductivity measurement with 352 nm light reveals the self-powered UV detection capability of the device due to the built-in potential at the bilayer interface. The device exhibits a high photoresponsivity (46.05 A W-1), detectivity (2.84 × 1012 Jones) and EQE (16 223%) even with a weak illumination of 76 μW cm-2, at a low bias of only -1 V. The self-powered performance of the bilayer device is comparable to that of commercial Si photodetectors as well as other such UV detectors reported based on metal oxide heterojunctions. The improved and faster photoresponse shown by the device is due to the formation of an effective heterojunction, as evidenced by XPS, electrochemical and I-V studies. It can be further attributed to the better charge transport through the densely aligned nanostructures, reduced recombination and the better mobility of anatase TiO2 nanoparticles. The performance is best-in-class and proves the potential of the transparent heterojunction to be used in highly responsive, self-powered UV detectors for low bias, low light applications.
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Affiliation(s)
- Bhuvaneshwari Ezhilmaran
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
| | - M Dhanasekar
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
| | - S Venkataprasad Bhat
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
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Cheng J, Dai Z, Chen B, Ji R, Yang X, Hu R, Zhu J, Li L. Well-Dispersed Cu 2ZnSnS 4 Nanocrystals Synthesized from Alcohols and Their Applications for Polymer Photovoltaics. NANOSCALE RESEARCH LETTERS 2016; 11:550. [PMID: 27957729 PMCID: PMC5153387 DOI: 10.1186/s11671-016-1761-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 11/29/2016] [Indexed: 06/06/2023]
Abstract
In this work, we report on a simple non-injection synthesis routine for the preparation of well-dispersed monocrystalline Cu2ZnSnS4 (CZTS) nanoparticles (NPs). The nanocrystal morphology was investigated by scanning and transmission electron microscopy, and its phase composition was studied by X-ray diffraction and Raman analyses. Cu2ZnSnS4 nanoparticles prepared using ethanolamine and diethanolamine as chemical stabilizers showed a high purity and a suitable size for polymer solar cell applications. The fabricated CZTS NPs are shown to be easily dispersed in a polymer/fullerene aromatic solution as well as the hybrid photovoltaic active layer. Thanks to the increment in the light absorption and electrical conductivity of the active layer, solar cells with a small amount of CZTS nanoparticles resulted in a clear enhancement of the photovoltaic performance. The short-circuit current density is increased from 9.90 up to 10.67 mA/cm2, corresponding to an improvement in the power conversion efficiency (PCE) from 3.30 to 3.65%.
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Affiliation(s)
- Jiang Cheng
- Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Zhongjun Dai
- College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Bing Chen
- College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Ran Ji
- Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Xin Yang
- Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Rong Hu
- Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Jiang Zhu
- College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
| | - Lu Li
- College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160 People’s Republic of China
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