期刊
SOLAR RRL
卷 3, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.201800256
关键词
energy level tuning; tin-lead mixed; perovskite solar cell; photovoltaic devices
资金
- National Key Research and Development Program of China [2016YFA0204000]
- National Natural Science Foundation of China [U1632118, 21571129]
- Shanghai Tech Start-up Funding
- Science and Technology Commission of Shanghai Municipality [16JC1402100, 16520720700]
- 1000 Young Talent Program
Small bandgap Sn-Pb mixed perovskite is generally regarded as the most promising structure to further enhance the power conversion efficiency of perovskite solar cells. However, the open circuit voltages (V(OC)s) are usually lower than expected. In this work, by doping the generally used hole transporting layer (HTL) poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) with a perfluorinated ionomer (PFI), we can tune the work function of it from -5.02 to -5.19eV. This reduces the energy level mismatch between the FA(0.6)MA(0.4) Sn0.6Pb0.4I3 (FAMA) absorber and HTL, giving rise to enhanced built-in voltage and better carrier extraction. The V-OC improves to over 50mV, up to 0.783V, resulting in an improved champion power conversion efficiency (PCE) of 15.85%. Moreover, the devices based on modified HTLs show improved stability at maximum power point. These results demonstrate that energy level tuning of the HTL is a promising strategy for the improvement of the PCEs of Sn-Pb mixed inverted PSCs, and the addition of PFI is an effective method to tune the work function of PEDOT:PSS.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据