High-performance methylammonium-free ideal-band-gap perovskite solar cells

Autor: Joseph J. Berry, Erin L. Ratcliff, Kai Zhu, Ji Hao, Nitin P. Padture, Jue Gong, Michael A. Anderson, Mengjin Yang, Srinivas K. Yadavalli, Yuanyuan Zhou, Fei Zhang, Chuanxiao Xiao, Jinhui Tong, Mingyu Hu, Zhenghong Dai
Rok vydání: 2021
Předmět:
Zdroj: Matter. 4:1365-1376
ISSN: 2590-2385
DOI: 10.1016/j.matt.2021.01.003
Popis: Summary The development of mixed tin-lead (Sn-Pb)-based perovskite solar cells (PSCs) with low band gap (1.2–1.4 eV) has become critical not only for pushing single-junction devices toward the maximum efficiency given by the Shockley-Queisser limit, but also for enabling all-perovskite tandem devices beyond this limit. However, achieving high power-conversion efficiency (PCE) and long-term device operation stability simultaneously remains a significant challenge for Sn-Pb-based PSCs. Here, we demonstrate near ideal-band-gap (∼1.34 eV) methylammonium-free Sn-Pb-based PSCs with high efficiency (∼20%) and promising operational stability of maintaining >80% of initial PCE over 750 h under maximum-power-point tracking. The key to this success is the use of a SnCl2⋅3FACl complex additive that improves the microstructure and reduces the development of residual stress in the Sn-Pb perovskite thin films, which in turn enhances the efficiency and stability of the Sn-Pb-based ideal-band-gap PSCs.
Databáze: OpenAIRE