Toward high-efficiency and thermally-stable perovskite solar cells: A novel metal-organic framework with active pyridyl sites replacing 4-tert-butylpyridine
By Zhou, Xuesong; Qiu, Lele; Fan, Ruiqing; Ye, Haoxin; Tian, Changhao; Hao, Sue; Yang, Yulin
Published in Journal of Power Sources
Journal of Power Sources
2020
Abstract
4-tert-butylpyridine (t-BP), the only liquid phase constituent in hole transport layers (HTLs) of perovskite solar cells (PSCs), volatilizes easily to induce the aggregation, hydration, and ion penetration of lithium salts, thereby seriously impairing the thermal stability of devices. Herein, an efficient strategy is presented to address this issue by developing a novel thermally-stable metal-organic framework (MOF) In-Pyia with active pyridyl sites to replace the volatile t-BP. The In-Pyia-modified PSCs realize enhanced power conversion efficiency (PCE) with low performance fluctuation (19.47