Open Accessα-DTC70 fullerene performs significantly better than β-DTC70 as electron transporting material in perovskite solar cells
Author(s) -
Edison Castro,
Olivia FernandezDelgado,
Albert Artigas,
Gerardo Zavala,
Fang Liu,
Antonio MorenoVicente,
Antonio RodríguezFortea,
José Roberto Concha Velásquez,
Josep M. Poblet,
Luís Echegoyen
Publication year - 2020
Publication title -
journal of materials chemistry. c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.899
H-Index - 128
eISSN - 2050-7534
pISSN - 2050-7526
DOI - 10.1039/d0tc01382j
Subject(s) - perovskite (structure) , materials science , fullerene , electron , optoelectronics , engineering physics , chemical engineering , organic chemistry , nuclear physics , physics , chemistry , engineering
In this work, two new C 70 isomers, α and β bis(2-(thiophen-2-yl)ethyl)-C 70 -fullerene mono-adducts (DTC 70 ), were synthesized, characterized and used as electron transporting materials (ETMs) in perovskite solar cells (PSCs). Our results show that the α isomer improves both the J sc and FF values of the devices, when compared to the results for the β-isomer and to those for phenyl-C 70 -butyric acid methyl ester (PC 71 BM), used as control. Devices based on α-DTC 70 achieved a power conversion efficiency (PCE) of 15.9%, which is higher than that observed with PC 71 BM (15.1%).