α-DTC70 fullerene performs significantly better than β-DTC70 as electron transporting material in perovskite solar cells

Edison Castro; Olivia Fernandez-Delgado; Albert Artigas; Gerardo Zavala; Fang Liu; Antonio Moreno-Vicente; Antonio Rodríguez-Fortea; José D. Velasquez; Josep M. Poblet; Luis Echegoyen

doi:10.1039/D0TC01382J

α-DTC₇₀ fullerene performs significantly better than β-DTC₇₀ as electron transporting material in perovskite solar cells†

Edison Castro,

‡*^a Olivia Fernandez-Delgado,

‡^a Albert Artigas,

^b Gerardo Zavala,^a Fang Liu,^c Antonio Moreno-Vicente,^d Antonio Rodríguez-Fortea,

^d José D. Velasquez,^ae Josep M. Poblet

^d and Luis Echegoyen

*^a

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* Corresponding authors

^a Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
E-mail: eacastroportillo@utep.edu, echegoyen@utep.edu

^b Institut de Química Computacional i Catàlisi (IQCC), Department de Química, Universitat de Girona, 17003 Girona, Catalonia, Spain

^c Department of Chemistry, Columbia University, New York, New York 10027, USA

^d Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, Tarragona, Spain

^e Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, A. A. 25360 Cali, Colombia

Abstract

In this work, two new C₇₀ isomers, α and β bis(2-(thiophen-2-yl)ethyl)-C₇₀-fullerene mono-adducts (DTC₇₀), 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-C₇₀-butyric acid methyl ester (PC₇₁BM), used as control. Devices based on α-DTC₇₀ achieved a power conversion efficiency (PCE) of 15.9%, which is higher than that observed with PC₇₁BM (15.1%).

Journal of Materials Chemistry C

α-DTC₇₀ fullerene performs significantly better than β-DTC₇₀ as electron transporting material in perovskite solar cells†

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α-DTC₇₀ fullerene performs significantly better than β-DTC₇₀ as electron transporting material in perovskite solar cells

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Journal of Materials Chemistry C