期刊
ADVANCED MATERIALS INTERFACES
卷 7, 期 14, 页码 -出版社
WILEY
DOI: 10.1002/admi.202000105
关键词
perovskite; perovskite solar cells; stability; surface passivation
资金
- National Research Foundation of Korea (NRF) [NRF-2017R1A2B4008117]
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2018R1A6A1A03024334]
- HOMING programme of the Foundation for Polish Science
- European Union under the European Regional Development Fund [POIR.04.04.00-00-5EE7/18-00]
Interfacial engineering between the perovskite and hole transport layers has emerged as an effective way to improve perovskite solar cell (PSC) performance. A variety of organic halide salts are developed to passivate the traps and enhance the charge carrier transport. Here, the use of guanidinium iodide (GuaI) for interfacial modification of mixed-cation (Cs)(x)(FA)(1-x)PbI3 perovskite films, which results in the formation of a low-dimensional delta-FAPbI(3)-like phase on the 3D perovskite surface, is reported. The presence of this thin layer facilitates charge transfer at interfaces and reduces charge carrier recombination pathways as evidenced by enhanced carrier lifetimes and favorable interfacial band alignment. As a result, the power conversion efficiency of the control device is boosted from 19.22% to 20.07%, mainly due to improved open-circuit voltage (V-oc) and fill factor. Furthermore, the post-treatment with GuaI improves the moisture stability of perovskite polycrystalline films and ambient stability of PSCs.
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