Bifunctional pi-conjugated ligand assisted stable and efficient perovskite solar cell fabrication via interfacial stitching
Bifunctional pi-conjugated ligand assisted stable and efficient perovskite solar cell fabrication via interfacial stitching
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双功能π共轭配体通过界面缝合辅助稳定高效的钙钛矿太阳能电池制造
DOI：
10.1039/c9ta03898a
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发表时间：
2019
影响因子：
11.9
通讯作者：
Wu Zhaoxin
中科院分区：
文献类型：
--
作者：
Wei Feijie;Jiao Bo;Dong Hua;Xu Jie;Lei Ting;Zhang Junjie;Yu Yue;Ma Lin;Wang Dongdong;Chen Jinbo;Hou Xun;Wu Zhaoxin
配体辅助界面工程被认为是同时提高钙钛矿太阳能电池（PSC）性能和稳定性的一种有前途的策略。由于传统非共轭配体的绝缘性质，陷阱钝化总是以钙钛矿薄膜的界面/体载子传输为代价。为了克服这一矛盾，引入功能性有机胺盐，3-苯基-2-丙烯-1-碘化胺，（PPEAI），通过“界面缝合效应”来改变钙钛矿膜的界面特性。这种典型的配体可以有效地抑制表面缺陷和离子迁移。此外，由于PPEAI的共轭和离域特性，可以实现钙钛矿膜的改善的电荷传输行为。通过采用优化的PPEAI改性的钙钛矿膜，从冠军器件获得了21.01%的效率，在环境条件和操作条件下都具有良好的稳定性而没有封装。
Ligand-assisted interface engineering has been considered as a promising strategy to improve the performance and stability of perovskite solar cells (PSCs) simultaneously. Due to the insulating properties of conventional non-conjugated ligands, trap passivation is always at the expense of the interface/bulk carrier transport of the perovskite film. To overcome this paradox, a functional organic amine salt, 3-phenyl-2-propen-1-amine iodide, (PPEAI), is introduced to modify the interfacial characteristics of perovskite films via an “interfacial stitching effect”. This typical ligand could effectively contribute to the suppression of surface defects and ion migration. Furthermore, improved charge transport behavior of perovskite films can be achieved due to the conjugation and delocalization characteristics of PPEAI. By employing the optimized PPEAI modified perovskite film, a 21.01% efficiency was obtained from the champion device, with good stability under both ambient conditions and operation conditions without encapsulation.