Achieving over 21% efficiency in inverted perovskite solar cells by fluorinating a dopant-free hole transporting material

doi:10.1039/d0ta00522c

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Achieving over 21% efficiency in inverted perovskite solar cells by fluorinating a dopant-free hole transporting material
	Wan, Li ; Zhang, Wenxiao ; Fu, Sheng ; Chen, Lijun ; Wang, Yueming ; Xue, Zhongyuan ; Tao, Youtian ; Zhang, Wenjun ; Song, Weijie ; Fang, Junfeng
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020
卷号	8 期号:14 页码:6517-6523
关键词	HIGHLY EFFICIENT
DOI	10.1039/d0ta00522c
英文摘要	Hole transporting materials (HTMs) play a critical role in ameliorating the performance of perovskite solar cells (PSCs). Dedicated HTMs can improve not only the hole extraction and efficiency but also the stability. Herein, PFDT-COOH and its fluorinated derivative, PFDT-2F-COOH, are introduced as dopant-free HTMs for inverted PSCs. Compared to PFDT-COOH, PFDT-2F-COOH exhibits a deeper highest occupied molecular orbital (HOMO) level, a higher work function on indium tin oxide electrodes, and an elevated built-in potential in the device. The PFDT-COOH device based on FA(1-x)MA(x)PbI(3) mixed-cation perovskite exhibits a champion power conversion efficiency (PCE) of 20.64%, while the PFDT-2F-COOH device exhibits a champion PCE of 21.68%, which is close to the highest value (21.7%) attained in inverted single-junction PSCs. The elevated efficiency is attributed to reduction of carrier recombination and enhancement of carrier extraction via the fluorination strategy. In addition, the two devices also show excellent operational and thermal stabilities. Therefore, our work offers a feasible strategy for preparing high efficiency and stable inverted PSCs.
学科主题	Chemistry ; Energy & Fuels ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19799]
专题	2020专题
作者单位	1.Zhang, WJ 2.Fang, JF (corresponding author), East China Normal Univ, Minist Educ, Engn Res Ctr Nanophoton & Adv Instrument, Sch Phys & Mat Sci, Shanghai 200241, Peoples R China. 3.Fang, JF (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Wan, Li,Zhang, Wenxiao,Fu, Sheng,et al. Achieving over 21% efficiency in inverted perovskite solar cells by fluorinating a dopant-free hole transporting material[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8(14):6517-6523.
APA	Wan, Li.,Zhang, Wenxiao.,Fu, Sheng.,Chen, Lijun.,Wang, Yueming.,...&Fang, Junfeng.(2020).Achieving over 21% efficiency in inverted perovskite solar cells by fluorinating a dopant-free hole transporting material.JOURNAL OF MATERIALS CHEMISTRY A,8(14),6517-6523.
MLA	Wan, Li,et al."Achieving over 21% efficiency in inverted perovskite solar cells by fluorinating a dopant-free hole transporting material".JOURNAL OF MATERIALS CHEMISTRY A 8.14(2020):6517-6523.