| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Antimony Selenide Thin Film Solar Cells with an Electron Transport Layer of Alq$_{3}$ |
| Wen-Jian Shi1, Ze-Ming Kan1, Chuan-Hui Cheng2*, Wen-Hui Li2, Hang-Qi Song2, Meng Li2, Dong-Qi Yu1*, Xiu-Yun Du1, Wei-Feng Liu3, Sheng-Ye Jin4, and Shu-Lin Cong2 |
1School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
2School of Physics, Dalian University of Technology, Dalian 116024, China
3Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China
4State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 China
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| Cite this article: |
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Wen-Jian Shi, Ze-Ming Kan, Chuan-Hui Cheng et al 2020 Chin. Phys. Lett. 37 108401 |
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Abstract We fabricated Sb$_{2}$Se$_{3}$ thin film solar cells using tris(8-hydroxy-quinolinato) aluminum (Alq$_{3}$) as an electron transport layer by vacuum thermal evaporation. Another small organic molecule of N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)benzidine (NPB) was used as a hole transport layer. We took ITO/NPB/Sb$_{2}$Se$_{3}$/Alq$_{3}$/Al as the device architecture. An open circuit voltage ($V_{\rm oc}$) of 0.37 V, a short circuit current density ($J_{\rm sc}$) of 21.2 mA/cm$^{2}$, and a power conversion efficiency (PCE) of 3.79% were obtained on an optimized device. A maximum external quantum efficiency of 73% was achieved at 600 nm. The $J_{\rm sc}$, $V_{\rm oc}$, and PCE were dramatically enhanced after introducing an electron transport layer of Alq$_{3}$. The results suggest that the interface state density at Sb$_{2}$Se$_{3}$/Al interface is decreased by inserting an Alq$_{3}$ layer, and the charge recombination loss in the device is suppressed. This work provides a new electron transport material for Sb$_{2}$Se$_{3}$ thin film solar cells.
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Received: 14 July 2020
Published: 29 September 2020
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| PACS: |
84.60.Jt
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(Photoelectric conversion)
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85.30.De
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(Semiconductor-device characterization, design, and modeling)
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| Fund: Supported by the High Level Talents Project of Hainan Basic and Applied Research Program (Natural Science) (Grant No. 2019RC118), and the Open Fund of the State Key Laboratory of Molecular Reaction Dynamics in DICP (Grant No. SKLMRD-K202005). |
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