串联
光电流
钙钛矿(结构)
材料科学
钝化
硅
能量转换效率
光电子学
晶界
带隙
半导体
钙钛矿太阳能电池
纳米技术
化学
复合材料
结晶学
图层(电子)
微观结构
作者
Bo Chen,Zhengshan J. Yu,Kong Liu,Xiaopeng Zheng,Ye Liu,Jianwei Shi,Derrek Spronk,Peter N. Rudd,Zachary C. Holman,Jinsong Huang
出处
期刊:Joule
[Elsevier]
日期:2018-10-24
卷期号:3 (1): 177-190
被引量:373
标识
DOI:10.1016/j.joule.2018.10.003
摘要
Organic-inorganic halide perovskites are promising semiconductors to mate with silicon in tandem photovoltaic cells due to their solution processability and tunable complementary bandgaps. Herein, we show that a combination of two additives, MACl and MAH2PO2, in the perovskite precursor can significantly improve the grain morphology of wide-bandgap (1.64–1.70 eV) perovskite films, resulting in solar cells with increased photocurrent while reducing the open-circuit voltage deficit to 0.49–0.51 V. The addition of MACl enlarges the grain size, while MAH2PO2 reduces non-radiative recombination through passivation of the perovskite grain boundaries, with good synergy of functions from MACl and MAH2PO2. Matching the photocurrent between the two sub-cells in a perovskite/silicon monolithic tandem solar cell by using a bandgap of 1.64 eV for the top cell results in a high tandem Voc of 1.80 V and improved power conversion efficiency of 25.4%.
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