Premium
Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) Modified by Water for Efficient Inverted Perovskite Solar Cells
Author(s) -
Xiong Jian,
Zhao Qian,
Liu Weizhi,
Dai Zhongjun,
Fan Baojin,
Xue Xiaogang,
Huang Yu,
Zhang Xiuyun,
Zhang Zheling,
Cai Ping,
Dai Qilin,
Zhang Jian
Publication year - 2021
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202100066
Subject(s) - pedot:pss , materials science , crystallinity , perovskite (structure) , energy conversion efficiency , chemical engineering , work function , optoelectronics , layer (electronics) , nanotechnology , composite material , engineering
Poly(3,4‐ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) is a popular hole transport material in inverted perovskite solar cells (PSCs). However, it is required to modify the PEDOT:PSS to achieve high‐performance PSCs. Herein, a facile method to modify PEDOT:PSS using water to improve the performance of inverted PSCs is developed. The modification impact on the physical properties of the PEDOT:PSS films is systemically studied. The results show that the transmittance and resistance of the PEDOT:PSS layer are greatly improved by modification using water without changing its work function. The growth of perovskite films on PEDOT:PSS is also influenced by the modification of PEDOT:PSS using water. Better crystallinity and larger grain sizes of the perovskite film are also achieved, leading to recombination loss being greatly reduced and the performance of the devices significantly improved. The PSCs based on modified PEDOT:PSS exhibit a higher power conversion efficiency (PCE) of 17.28 % and higher open‐circuit voltage ( V oc ) of 1.06 V compared to control devices prepared with unmodified PEDOT:PSS (PCE = 12.49%, V oc = 0.99 V). This work provides a facile method to modify PEDOT:PSS to prepare high‐performance inverted PSCs.