材料科学
介孔材料
能量转换效率
光伏系统
钙钛矿(结构)
纳米技术
钙钛矿太阳能电池
电子传输链
化学工程
光电子学
生物
工程类
植物
催化作用
生物化学
化学
生态学
作者
Qin Liu,Minchao Qin,Weijun Ke,Xiaolu Zheng,Chen Zhao,Pingli Qin,Lixia Xiong,Hongwei Lei,Jiawei Wan,Jian Wen,Guang Yang,Junjie Ma,Zhenyu Zhang,Guojia Fang
标识
DOI:10.1002/adfm.201600910
摘要
Perovskite solar cells (PSCs) may offer huge potential in photovoltaic conversion, yet their practical applications face one major obstacle: their low stability, or quick degradation of their initial efficiencies. Here, a new design scheme is presented to enhance the PSC stability by using low‐temperature hydrothermally grown hierarchical nano‐SnO 2 electron transport layers (ETLs). The ETL contains a thin compact SnO 2 layer underneath a mesoporous layer of SnO 2 nanosheets. The mesoporous layer plays multiple roles of enhancing photon collection, preventing moisture penetration and improving the long‐term stability. Through such simple approaches, PSCs with power conversion efficiencies of ≈13% can be readily obtained, with the highest efficiency to be 16.17%. A prototypical PSC preserves 90% of its initial efficiency even after storage in air at room temperature for 130 d without encapsulation. This study demonstrates that hierarchical SnO 2 is a potential ETL for fabricating low‐cost and efficient PSCs with long‐term stability.
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