Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy
Colloidal quantum dot solar cells (CQDSCs) based on one-dimensional metal oxide nanowires (NWs) as the electron transport layer (ETL) have attracted much attention due to their larger ETL/colloidal quantum dots (CQDs) contact area and longer electron transport length than other structure CQDSCs, suc...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-02-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fenrg.2019.00011/full |
| _version_ | 1818357423978577920 |
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| author | Shuhei Ozu Yaohong Zhang Hironobu Yasuda Yukiko Kitabatake Yukiko Kitabatake Taro Toyoda Masayuki Hirata Kenji Yoshino Kenji Katayama Shuzi Hayase Ruixiang Wang Qing Shen |
| author_facet | Shuhei Ozu Yaohong Zhang Hironobu Yasuda Yukiko Kitabatake Yukiko Kitabatake Taro Toyoda Masayuki Hirata Kenji Yoshino Kenji Katayama Shuzi Hayase Ruixiang Wang Qing Shen |
| author_sort | Shuhei Ozu |
| collection | DOAJ |
| description | Colloidal quantum dot solar cells (CQDSCs) based on one-dimensional metal oxide nanowires (NWs) as the electron transport layer (ETL) have attracted much attention due to their larger ETL/colloidal quantum dots (CQDs) contact area and longer electron transport length than other structure CQDSCs, such as planar CQDSCs. However, it is known that defect states in NWs would increase the recombination rate because of the high surface area of NWs. Here, the defect species on the ZnO NWs' surface which resulted in the surface recombination and SnO2 passivation effects were investigated. Comparing with the solar cells using pristine ZnO NWs, the CQDSCs based on SnO2 passivated ZnO NW electrodes exhibited a beneficial band alignment to charge separation, and the interfacial recombination at the ZnO/CQD interface was reduced, eventually resulting in a 40% improvement of power conversion efficiency (PCE). Overall, these findings indicate that surface passivation and the reduction of deep level defects in ETLs could contribute to improving the PCE of CQDSCs. |
| first_indexed | 2024-12-13T20:12:53Z |
| format | Article |
| id | doaj.art-0e97f55420e5402faba153c22f4fc165 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-13T20:12:53Z |
| publishDate | 2019-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-0e97f55420e5402faba153c22f4fc1652022-12-21T23:32:52ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2019-02-01710.3389/fenrg.2019.00011441666Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation StrategyShuhei Ozu0Yaohong Zhang1Hironobu Yasuda2Yukiko Kitabatake3Yukiko Kitabatake4Taro Toyoda5Masayuki Hirata6Kenji Yoshino7Kenji Katayama8Shuzi Hayase9Ruixiang Wang10Qing Shen11Faculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanFaculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanFaculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanFaculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanDepartment of Applied Chemistry, Chuo University, Tokyo, JapanFaculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanDepartment of Electrical and Electronic Engineering, Miyazaki University, Miyazaki, JapanDepartment of Electrical and Electronic Engineering, Miyazaki University, Miyazaki, JapanDepartment of Applied Chemistry, Chuo University, Tokyo, JapanFaculty of Life Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, JapanBeijing Engineering Research Centre of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture, Beijing, ChinaFaculty of Informatics and Engineering, University of Electro-Communications, Tokyo, JapanColloidal quantum dot solar cells (CQDSCs) based on one-dimensional metal oxide nanowires (NWs) as the electron transport layer (ETL) have attracted much attention due to their larger ETL/colloidal quantum dots (CQDs) contact area and longer electron transport length than other structure CQDSCs, such as planar CQDSCs. However, it is known that defect states in NWs would increase the recombination rate because of the high surface area of NWs. Here, the defect species on the ZnO NWs' surface which resulted in the surface recombination and SnO2 passivation effects were investigated. Comparing with the solar cells using pristine ZnO NWs, the CQDSCs based on SnO2 passivated ZnO NW electrodes exhibited a beneficial band alignment to charge separation, and the interfacial recombination at the ZnO/CQD interface was reduced, eventually resulting in a 40% improvement of power conversion efficiency (PCE). Overall, these findings indicate that surface passivation and the reduction of deep level defects in ETLs could contribute to improving the PCE of CQDSCs.https://www.frontiersin.org/article/10.3389/fenrg.2019.00011/fullcolloidal quantum dot solar cellsPbSZnO nanowiresurface passivationinterfacial recombinationSnO2 |
| spellingShingle | Shuhei Ozu Yaohong Zhang Hironobu Yasuda Yukiko Kitabatake Yukiko Kitabatake Taro Toyoda Masayuki Hirata Kenji Yoshino Kenji Katayama Shuzi Hayase Ruixiang Wang Qing Shen Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy Frontiers in Energy Research colloidal quantum dot solar cells PbS ZnO nanowire surface passivation interfacial recombination SnO2 |
| title | Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy |
| title_full | Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy |
| title_fullStr | Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy |
| title_full_unstemmed | Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy |
| title_short | Improving Photovoltaic Performance of ZnO Nanowires Based Colloidal Quantum Dot Solar Cells via SnO2 Passivation Strategy |
| title_sort | improving photovoltaic performance of zno nanowires based colloidal quantum dot solar cells via sno2 passivation strategy |
| topic | colloidal quantum dot solar cells PbS ZnO nanowire surface passivation interfacial recombination SnO2 |
| url | https://www.frontiersin.org/article/10.3389/fenrg.2019.00011/full |
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