能量转换效率
钙钛矿(结构)
磁滞
材料科学
钙钛矿太阳能电池
介孔材料
氧化锡
光电子学
平面的
图层(电子)
纳米技术
化学工程
兴奋剂
化学
结晶学
催化作用
凝聚态物理
有机化学
计算机图形学(图像)
工程类
物理
计算机科学
作者
Dong Yang,Ruixia Yang,Kai Wang,Congcong Wu,Xuejie Zhu,Jiangshan Feng,Xiaodong Ren,Guojia Fang,Shashank Priya,Shengzhong Liu
标识
DOI:10.1038/s41467-018-05760-x
摘要
Even though the mesoporous-type perovskite solar cell (PSC) is known for high efficiency, its planar-type counterpart exhibits lower efficiency and hysteretic response. Herein, we report success in suppressing hysteresis and record efficiency for planar-type devices using EDTA-complexed tin oxide (SnO2) electron-transport layer. The Fermi level of EDTA-complexed SnO2 is better matched with the conduction band of perovskite, leading to high open-circuit voltage. Its electron mobility is about three times larger than that of the SnO2. The record power conversion efficiency of planar-type PSCs with EDTA-complexed SnO2 increases to 21.60% (certified at 21.52% by Newport) with negligible hysteresis. Meanwhile, the low-temperature processed EDTA-complexed SnO2 enables 18.28% efficiency for a flexible device. Moreover, the unsealed PSCs with EDTA-complexed SnO2 degrade only by 8% exposed in an ambient atmosphere after 2880 h, and only by 14% after 120 h under irradiation at 100 mW cm-2.
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