苏州大学材料与化学化工学部材料学院李耀文

yangtao

A Semitransparent Inorganic Perovskite Film for Overcoming Ultraviolet Light Instability of Organic Solar Cells and Achieving 14.03% Efficiency

Weijie Chen1, Jingwen Zhang1, Guiying Xu1, Rongming Xue1, Yaowen Li1 *（李耀文）, Yinhua Zhou2, Jianhui Hou3, and Yongfang Li1,4

  

1 Laboratory of Advanced Optoelectronic Materials,College of Chemistry Chemical Engineering and Materials Science,Soochow University,Suzhou 215123, China

2 Wuhan National Laboratory for Optoelectronics,School of Optical and Electronic Information,Huazhong University of Science and Technology

Wuhan 430074, China

3 State Key Laboratory of Polymer Physics and Chemistry,CAS Research/Education Center for Excellence in Molecular Sciences ,Institute of Chemistry Chinese Academy of Sciences,Beijing 100190, P. R. China

4 CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry Chinese Academy of Sciences,Beijing 100190, China

  

Adv. Mater. 2018, 1800855

  

Organic solar cells (OSCs) can be unstable under ultraviolet (UV) irradiation. To address this issue and enhance the power conversion efficiency (PCE), an inorganic‐perovskite/organic four‐terminal tandem solar cell (TSC) based on a semitransparent inorganic CsPbBr3perovskite solar cell (pero‐SC) as the top cell and an OSC as bottom cell is constructed. The high‐quality CsPbBr3photoactive layer of the planar pero‐SC is prepared with a dual‐source vacuum coevaporation method, using stoichiometric precursors of CsBr and PbBr2with a low evaporation rate. The resultant opaque planar pero‐SC exhibits an ultrahigh open‐circuit voltage of 1.44 V and the highest reported PCE of 7.78% for a CsPbBr3‐based planar pero‐SC. Importantly, the devices show no degradation after 120 h UV light illumination. The related semitransparent pero‐SC can almost completely filter UV light and well maintain photovoltaic performance; it additionally shows an extremely high average visible transmittance. When it is used to construct a TSC, the top pero‐SC acting as a UV filter can utilize UV light for photoelectric conversion, avoiding the instability problem of UV light on the bottom OSC that can meet the industrial standards of UV‐light stability for solar cells, and leading to the highest reported PCE of 14.03% for the inorganic‐perovskite/organic TSC.

  

  

链接：https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201800855