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Doped Manipulation of Photoluminescence and Carrier Lifetime from CH₃NH₃PbI₃ Perovskite Thin Films

Author:
Ren, Lixia, Wang, Min, Wang, Shuanhu, Yan, Hong, Zhang, Zhan, Li, Ming, Zhang, Zhaoting, Jin, Kexin
Source:
ACS applied materials & interfaces 2019 v.11 no.17 pp. 16174-16180
ISSN:
1944-8252
Subject:
manganese acetate, photoluminescence, solar cells
Abstract:
The compositional doping techniques can delicately tune the band gap, carrier concentration, and mobility of perovskites to optimize the photoelectric properties of materials. It is reported that the doped perovskites have been widely researched in the photovoltaic and photoelectronic field. Here, we show that the photoluminescence intensity and carrier lifetime of CH₃NH₃PbI₃ films have been improved by 3 orders of magnitude by incorporating abundant MnAc₂·4H₂O in the perovskite precursor solution, which benefits from the morphological change and surface passivation induced by hydration water and surface manganese acetate. We also witness the increased photoluminescence quantum yield for film and the changed power conversion efficiency for perovskite solar cells. More importantly, the enhanced chemical stability of perovskite is displayed by immersing films into the water.
Agid:
6392052