Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH(4)SCN

The trap-state density in perovskite films largely determines the photovoltaic performance of perovskite solar cells (PSCs). Increasing the crystal grain size in perovskite films is an effective method to reduce the trap-state density. Here, we have added NH(4)SCN into perovskite precursor solution...

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Detalles Bibliográficos
Autores principales: Liu, Ziji, Liu, Detao, Chen, Hao, Ji, Long, Zheng, Hualin, Gu, Yiding, Wang, Feng, Chen, Zhi, Li, Shibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2019
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6718693/
https://www.ncbi.nlm.nih.gov/pubmed/31478092
http://dx.doi.org/10.1186/s11671-019-3134-4
Descripción
Sumario:The trap-state density in perovskite films largely determines the photovoltaic performance of perovskite solar cells (PSCs). Increasing the crystal grain size in perovskite films is an effective method to reduce the trap-state density. Here, we have added NH(4)SCN into perovskite precursor solution to obtain perovskite films with an increased crystal grain size. The perovskite with increased crystal grain size shows a much lower trap-state density compared with reference perovskite films, resulting in an improved photovoltaic performance in PSCs. The champion photovoltaic device has achieved a power conversion efficiency of 19.36%. The proposed method may also impact other optoelectronic devices based on perovskite films.

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