Ying-Chiao Wang

Abstract Self-assembled molecules are widely used as bottom interfacial layers in inverted perovskite solar cells, yet their application to perovskite top surfaces remains poorly understood. Here, we develop two self-assembled molecules for perovskite surface modification and interfacial optimization with the hole transport layer. Through solvent engineering, ordered and uniform molecular packing is achieved on the perovskite surface.

Terpyridine-zinc(II) coordination nanosheets as modulators of perovskite crystallization to enhance solar cell efficiency Ying-Chiao Wang, Chun-Hao Chiang, Chun-Jen Su, Je-wei Chang, Chi-Ying Lin, Chia-Chun Wei, Shao-Ku Huang, Hiroaki Maeda, Wen-Bin Jian, U-Ser Jeng, Kazuhito TSUKAGOSHI, Chun-Wei Chen and Hiroshi Nishihara Abstract The high efficiency of precursor-to-perovskite conversion is one of the core factors in boosting the performance of perovskite solar cells (PSCs).

There are three unique advantages of TMTA: first, TMTA is a sticky liquid at room temperature (Supplementary Fig. 1a). During the crystallization of solid perovskite, the liquid TMTA will be automatically expelled to GBs without the interruption of crystal growth. Second, the carbonyl groups in TMTA allow weak interaction with PbI (Fig. 1c), making TMTA chemically anchor to GBs and passivate the defects39, thus leading to improved device efficiency of over 20%.