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Selenophene‐Based Hole‐Transporting Materials for Perovskite Solar Cells
Author(s) -
Illicachi Luis A.,
UrietaMora Javier,
Momblona Cristina,
MolinaOntoria Agustín,
Calbo Joaquín,
Aragó Juan,
Insuasty Braulio,
Ortiz Alejandro,
Ortí Enrique,
Martín Nazario,
Nazeeruddin Mohammad Khaja
Publication year - 2021
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.202100208
Subject(s) - perovskite (structure) , materials science , energy conversion efficiency , photovoltaic system , mesoporous material , covalent bond , density functional theory , chemical engineering , nanotechnology , optoelectronics , crystallography , chemistry , computational chemistry , catalysis , organic chemistry , ecology , engineering , biology
Two novel and simple donor‐π‐bridge‐donor (D‐π‐D) hole‐transporting materials (HTMs) containing two units of the p ‐methoxytriphenylamine (TPA) electron donor group covalently bridged by means of the 3,4‐dimethoxyselenophene spacer through single and triple bonds are reported. The optoelectronic and thermal properties of the new selenium‐containing HTMs have been determined using standard experimental techniques and theoretical density functional theory (DFT) calculations. The selenium‐based HTMs have been incorporated in mesoporous perovskite solar cells (PSCs) in combination with the triple‐cation perovskite [(FAPbI 3 ) 0.87 (MAPbBr 3 ) 0.13 ] 0.92 [CsPbI 3 ] 0.08 . Limited values of power conversion efficiencies, up to 13.4 %, in comparison with the archetype spiro‐OMeTAD (17.8 %), were obtained. The reduced efficiencies showed by the new HTMs are attributed to their poor film‐forming ability, which constrains their photovoltaic performance due to the appearance of structural defects (pinholes).