Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Ziji Liu; Detao Liu; Hao Chen; Long Ji; Hualin Zheng; Yiding Gu; Feng Wang; Zhi Chen; Shibin Li

doi:10.1186/s11671-019-3134-4

Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH₄SCN

Ziji Liu
, Detao Liu
, Hao Chen
, Long Ji
, Hualin Zheng
, Yiding Gu
, Feng Wang
, Zhi Chen
, Shibin Li

Producción científica: Article › revisión exhaustiva

29 Citas (Scopus)

Resumen

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 NH₄SCN 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.

Idioma original	English
Número de artículo	304
Publicación	Nanoscale Research Letters
Volumen	14
N.º	1
DOI	https://doi.org/10.1186/s11671-019-3134-4
Estado	Published - 2019

Nota bibliográfica

Publisher Copyright:
© 2019, The Author(s).

Financiación

The authors greatly acknowledge the Sichuan University and Ceshigou Analytical Testing Company for the measurement assistance. This work was supported by the National Natural Science Foundation of China under Grant Nos. 61874150, 61421002, and 61574029. This work was also partially supported by the University of Kentucky. The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. The authors declare no competing financial interests.

Financiadores	Número del financiador
Ceshigou Analytical Testing Company
University of Kentucky
National Natural Science Foundation of China (NSFC)	61574029, 61874150, 61421002
National Natural Science Foundation of China (NSFC)
Sichuan University, Chengdu, Sichuan

ODS de las Naciones Unidas

Este resultado contribuye a los siguientes Objetivos de Desarrollo Sostenible

Affordable and clean energy

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1186/s11671-019-3134-4

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abstract = "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 NH4SCN 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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AU - Liu, Ziji

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AU - Zheng, Hualin

AU - Gu, Yiding

AU - Wang, Feng

AU - Chen, Zhi

AU - Li, Shibin

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AB - 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 NH4SCN 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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