INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Factors influencing the performance of paintable carbon-based perovskite solar cells fabricated in ambient air |
Wei-Kang Xu(许伟康), Feng-Xiang Chen(陈凤翔), Gong-Hui Cao(曹功辉), Jia-Qi Wang(王嘉绮), Li-Sheng Wang(汪礼胜) |
Department of Physics Science and Technology, School of Science, Wuhan University of Technology, Wuhan 430070, China |
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Abstract To date, many efforts have been made to improve the performance of paintable carbon-based (PC-based) perovskite solar cells (PSCs). Though great progress has been achieved, their power conversion efficiencies are still relatively low compared with hole-transport-materials-based PSCs. General research on influencing factors of performance in PC-based PSCs is still insufficient. In this work, PC-based PSCs were fabricated in ambient air and four groups of controlled experiments were performed in which the PbI2 layers were prepared with or without antisolvent extraction treatment. These four groups of experiments were designed to find out the effect of different influencing factors on PC-based PSCs performance, for example, PbI2 residual, the surface morphology of the perovskite film, the surface roughness of the perovskite film, and the contact status of the perovskite/carbon electrode interface. With a systematic analysis, we demonstrated that the contact status of the perovskite/carbon electrode interface played a vital role in PC-based PSCs, and a flat, smooth perovskite surface could help to improve this contact status significantly. Besides, on the precondition of a poor contact interface, no PbI2 residual and a good surface morphology only brought limited benefits to the performances of PC-based PSCs.
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Received: 17 October 2017
Revised: 18 November 2017
Accepted manuscript online:
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PACS:
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84.60.Jt
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(Photoelectric conversion)
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88.40.H-
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(Solar cells (photovoltaics))
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84.60.Bk
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(Performance characteristics of energy conversion systems; figure of merit)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51702245) and the Fundamental Research Funds for the Central Universities, China (Grant No. WUT: 2017IB013). |
Corresponding Authors:
Feng-Xiang Chen
E-mail: phonixchen79@whut.edu.cn
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Cite this article:
Wei-Kang Xu(许伟康), Feng-Xiang Chen(陈凤翔), Gong-Hui Cao(曹功辉), Jia-Qi Wang(王嘉绮), Li-Sheng Wang(汪礼胜) Factors influencing the performance of paintable carbon-based perovskite solar cells fabricated in ambient air 2018 Chin. Phys. B 27 038402
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