材料科学
制作
钙钛矿(结构)
光伏系统
成核
图层(电子)
双层
化学工程
多孔性
纳米技术
结晶
降水
复合材料
化学
膜
有机化学
生物化学
气象学
病理
工程类
物理
生态学
生物
替代医学
医学
作者
Yu Yu,Songwang Yang,Lei Lei,Yan Liu
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2017-01-01
卷期号:9 (7): 2569-2578
被引量:28
摘要
Perovskite films are a promising candidate for future highly efficient and low-cost solar cells. The long diffusion length of charge carriers in the perovskite film makes its architecture fabrication seem unnecessary, while the rapid crystallization process increases the difficulty in its architecture fabrication. Here we show the fabrication of perovskite architectures through a nucleation mediated interfacial precipitation method with the proper immiscible anti-solvent. Consecutively evolved architectures from tri-layer porous films to bilayer dense films are obtained. The interfacial precipitation provides the possibility of controlling the crystallization process of perovskite films, while the secondary nucleation is the origin of the porous architecture. The nucleation mediation can be a novel bottom-up approach to fabricate architectural perovskite films. The tri-layer architectural perovskite film exhibits excellent light absorption in the range of 500–800 nm and good photovoltaic performance with 8.2% enhancement in efficiency compared with the bilayer film for the corresponding solar cells.
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