Long Carrier Diffusion Length and Efficient Charge Transport in Thick Quasi-Two-Dimensional Perovskite Solar Cells Enabled by Modulating Crystal Orientation and Phase Distribution

doi:10.1021/acsaem.2c01401

	Long Carrier Diffusion Length and Efficient Charge Transport in Thick Quasi-Two-Dimensional Perovskite Solar Cells Enabled by Modulating Crystal Orientation and Phase Distribution
	Yang, Lvpeng 2; Shi, Jishan 1,2; Wu, Youzhi 1; Jin, Xin 2; Bie, Tong 2; Hu, Chunlong 2; Liang, Wenxi 2; Gao, Yerun 2; Xu, Meichen 2; Shao, Ming 2
刊名	ACS APPLIED ENERGY MATERIALS
	2022-06-01
卷号	5 期号:7 页码:8930-8939
关键词	two-dimensional perovskite diffusion length carrier transport phase distribution crystal orientation
ISSN号	2574-0962
DOI	10.1021/acsaem.2c01401
英文摘要	The applications of quasi-two-dimensional (quasi-2D) perovskite solar cells (PSCs) are limited by their insufficient charge transport, and the underlying charge transport mechanism is not clear yet. Herein, we report a simple strategy for achieving efficient charge transport in the quasi-2D perovskite FPEA(2)MA(n-1)Pb(n)I(3n+1) (& lang;n & rang; = 4) by combining the crystal orientation control via the hot-casting method and the regulation of phase composition and distribution using methylammonium chloride (MACl) additives. The steady and transient optical spectra reveal that the synergistic effect of hot-casting processing and MACl additive leads to the formation of 3D-like phases, acting as highly conductive pathways to boost charge collection and transport in quasi-2D perovskite films. These specific phase heterogeneities result in an extraordinary long carrier diffusion length of 1.2 mu m. The resultant quasi-2D PSCs show a high power conversion efficiency of 17.5%. Notably, this remarkable efficiency is achieved for a relatively thick film (similar to 623 nm), which is much thicker than most reported efficient quasi-2D PSCs (200-500 nm). Moreover, our PSCs have demonstrated excellent environmental stability and thermal stability. Our results highlight that controlling the crystal orientation and multiphase distribution of quasi-2D perovskites is very promising to push the efficiency of quasi-2D PSCs approaching their three-dimensional (3D) counterparts.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000823211200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158903]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Yang, Lvpeng,Shi, Jishan,Wu, Youzhi,et al. Long Carrier Diffusion Length and Efficient Charge Transport in Thick Quasi-Two-Dimensional Perovskite Solar Cells Enabled by Modulating Crystal Orientation and Phase Distribution[J]. ACS APPLIED ENERGY MATERIALS,2022,5(7):8930-8939.
APA	Yang, Lvpeng.,Shi, Jishan.,Wu, Youzhi.,Jin, Xin.,Bie, Tong.,...&Shao, Ming.(2022).Long Carrier Diffusion Length and Efficient Charge Transport in Thick Quasi-Two-Dimensional Perovskite Solar Cells Enabled by Modulating Crystal Orientation and Phase Distribution.ACS APPLIED ENERGY MATERIALS,5(7),8930-8939.
MLA	Yang, Lvpeng,et al."Long Carrier Diffusion Length and Efficient Charge Transport in Thick Quasi-Two-Dimensional Perovskite Solar Cells Enabled by Modulating Crystal Orientation and Phase Distribution".ACS APPLIED ENERGY MATERIALS 5.7(2022):8930-8939.