Premium
Dibenzo[ b , d ]thiophene‐Cored Hole‐Transport Material with Passivation Effect Enabling the High‐Efficiency Planar p–i–n Perovskite Solar Cells with 83% Fill Factor
Author(s) -
Zhang Jing,
Sun Quan,
Chen Qiaoyun,
Wang Yikai,
Zhou Yi,
Song Bo,
Jia Xuguang,
Zhu Yuanyuan,
Zhang Shuai,
Yuan Ningyi,
Ding Jianning,
Li Yongfang
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900421
Subject(s) - passivation , dopant , energy conversion efficiency , materials science , x ray photoelectron spectroscopy , perovskite (structure) , thiophene , fourier transform infrared spectroscopy , monomer , chemical engineering , optoelectronics , crystallography , nanotechnology , chemistry , doping , organic chemistry , layer (electronics) , composite material , engineering , polymer
N 2 , N 2 , N 8 , N 8 ‐tetrakis(4‐(methylthio)phenyl)dibenzo[ b,d ]thiophene‐2,8‐diamine (DBTMT) is synthesized from three commercial monomers for application as a promising dopant‐free hole‐transport material (HTM) in perovskite solar cells (pero‐SCs). The intrinsic properties (optical properties and electronic energy levels) of DBTMT are investigated, proving that DBTMT is a suitable HTM for the planar p–i–n pero‐SCs. The champion power conversion efficiency (PCE) of the optimized pero‐SCs (with structure as ITO/pristine DBTMT/MAPbI 3 /C 60 /BCP/Ag) reaches 21.12% with a fill factor (FF) of 83.25%, which is among the highest PCEs and FFs reported for planar p–i–n pero‐SCs based on dopant‐free HTMs. The Fourier‐transform infrared spectroscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy spectra of MAPbI 3 and DBTMT–MAPbI 3 films demonstrate that there is an interaction between DBTMT and MAPbI 3 at the interface through the sulfur atoms in DBTMT to passivate the defects, which is corresponding to the higher FF and PCE of the corresponding device.