Highly efficient bifacial semitransparent perovskite solar cells based on molecular doping of CuSCN hole transport layer

doi:10.1088/1674-1056/ab99ae

Abstract Coper thiocyanate (CuSCN) is generally considered as a very hopeful inorganic hole transport material (HTM) in semitransparent perovskite solar cells (ST-PSCs) because of its low parasitic absorption, high inherent stability, and low cost. However, the poor electrical conductivity and low work function of CuSCN lead to the insufficient hole extraction and large open-circuit voltage loss. Here, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) is employed to improve conductivity of CuSCN and band alignment at the CuSCN/perovskite (PVK) interface. As a result, the average power conversion efficiency (PCE) of PSCs is boosted by ≈ 11%. In addition, benefiting from the superior transparency of p-type CuSCN HTMs, the prepared bifacial semitransparent n-i-p planar PSCs demonstrate a maximum efficiency of 14.8% and 12.5% by the illumination from the front side and back side, respectively. We believe that this developed CuSCN-based ST-PSCs will promote practical applications in building integrated photovoltaics and tandem solar cells.

Keywords: perovskite solar cell CuSCN inorganic hole transport layer organic doping semitransparent solar cell

Received: 05 February 2020
Revised: 19 May 2020
Accepted manuscript online:

PACS:	88.40.H-	(Solar cells (photovoltaics))
	88.40.hj	(Efficiency and performance of solar cells)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB1500103), the National Natural Science Foundation of China (Grant No. 61674084), the Overseas Expertise Introduction Project for Discipline Innovation of Higher Education of China (Grant No. B16027), and the Science and Technology Project of Tianjin, China (Grant No. 18ZXJMTG00220).

Corresponding Authors: Pengyang Wang, Xiaodan Zhang
E-mail: pywang@nankai.edu.cn;xdzhang@nankai.edu.cn

Cite this article:

Shixin Hou(侯世欣), Biao Shi(石标), Pengyang Wang(王鹏阳), Yucheng Li(李玉成), Jie Zhang(张杰), Peirun Chen(陈沛润), Bingbing Chen(陈兵兵), Fuhua Hou(侯福华), Qian Huang(黄茜), Yi Ding(丁毅), Yuelong Li(李跃龙), Dekun Zhang(张德坤), Shengzhi Xu(许盛之), Ying Zhao(赵颖), Xiaodan Zhang(张晓丹) Highly efficient bifacial semitransparent perovskite solar cells based on molecular doping of CuSCN hole transport layer 2020 Chin. Phys. B 29 078801

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Highly efficient bifacial semitransparent perovskite solar cells based on molecular doping of CuSCN hole transport layer

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