期刊
ACS ENERGY LETTERS
卷 2, 期 12, 页码 2686-2693出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.7b00981
关键词
-
类别
资金
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University (HBKU)
- Qatar Foundation, Doha, Qatar, QF [2014.038.RA.QEERI.EPFL]
- SNSF NRP 70 [407040_154056]
- European Commission [H2020-ICT-2014-1]
- SOLEDLIGHT [N1: 643791]
- SwissState Secretariat for Education, Research and Innovation (SERI)
- Solaronix, Aubonne, Switzerland [CTI 15864.2 PFNM-NM]
- Swiss National Science Foundation (SNF) [407040_154056] Funding Source: Swiss National Science Foundation (SNF)
Understanding the crystallization process of organic-inorganic halide perovskites is of paramount importance for fabrication of reproducible and efficient perovskite solar cells. We report for the first time on the discovery and interplay of ubiquitous hexagonal polytypes (6H and 4H) during the crystallization process of mixed ion perovskite, namely (FAPbI(3))(x)(MAPbBr(3))(1-x). These polytypes, the first reported 31) hexagonal lead-halide-based perovskites, orchestrate a perovskite crystallization sequence revealed as 2H (delta phase)-4H-6H-3R(3C), commonly found among inorganic transition metal oxide perovskites under extreme conditions. We show that the chemical pressure arising from the incorporation of >3% Cs+ cations into the lattice successfully inhibits the formation of these environmentally sensitive polytypes, elucidating the origin of the widely reported improved device stability and reproducibility of Cs+-containing mixed ion perovskites.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据