Enhanced Crystallinity of Triple-Cation Perovskite Film via Doping NH4SCN

Autor:	Ziji Liu, Detao Liu, Hao Chen, Long Ji, Hualin Zheng, Yiding Gu, Feng Wang, Zhi Chen, Shibin Li
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Perovskite solar cells NH4SCN Crystalline Trap-state density Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Nanoscale Research Letters, Vol 14, Iss 1, Pp 1-7 (2019)
Druh dokumentu:	article
ISSN:	1931-7573 1556-276X
DOI:	10.1186/s11671-019-3134-4
Popis:	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.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/bf6d2a66a25b4cafa0a66b748d51865d Zobrazit plný text záznamu Full text from SpringerLink View record in DOAJ