Journal Article

Amorphous (lysine)2PbI2 layer enhanced perovskite photovoltaics

Wang, Xingtao, Liu, Tiantian, Wan, Li, Wang, Yu, Yang, Deren, Wen, Yehui, Ning, Weihua, Zhang, Rui, Zhang, Tianchi, Kan, Miao, Wang, Yong

2024

Overview

Passivation materials play a crucial role in a wide range of high-efficiency, high-stability photovoltaic applications based on crystalline silicon and state-of-the-art perovskite materials. Currently, for perovskite photovoltaic, the mainstream passivation strategies routinely rely on crystalline materials. Herein, we have invented a new amorphous (lysine) 2 PbI 2 layer-enhanced halide perovskite. By utilizing a solid phase reaction between PbI 2 and lysine molecule, an amorphous (lysine) 2 PbI 2 layer is formed at surface/grain boundaries in the perovskite films. The amorphous (lysine) 2 PbI 2 with fewer dangling bonds can effectively neutralize surface/interface defects, achieving an impressive efficiency of 26.27% (certified 25.94%). Moreover, this amorphous layer not only reduces crystal lattice stress but also functions as a barrier against the decomposition of organic components, leading to suppressed de-structuring of perovskite and highly stable perovskite solar cells. The mainstream passivation strategies routinely rely on crystalline materials for perovskite photovoltaics. Here, authors utilize a solid phase reaction to prepare an amorphous (lysine) 2 PbI 2 layer to neutralize surface and interface defects, achieving device efficiency of over 26% for solar cells.

• Publisher: Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
• Subject: 639/301/299/946 / 639/638/675 / Amorphous materials / Crystal defects / Crystal lattices / Decomposition reactions / Efficiency / Grain boundaries / Humanities and Social Sciences / Lysine / multidisciplinary / Passivity / Perovskites / Photovoltaic cells / Photovoltaics / Science / Science (multidisciplinary) / Solar cells / Solid phases