RT Journal Article
T1 Hole transporting materials based on benzodithiophene and dithienopyrrole cores for efficient perovskite solar cells
A1 Sandoval-Torrientes, Rafael
A1 Zimmermann, Iwan
A1 Calbo, Joaquín
A1 Aragó, Juan
A1 Santos, Juan
A1 Ortí, Enrique
A1 Martín León, Nazario
A1 Nazeeruddin, Mohammad
AB The development of highly efficient hole transporting materials (HTMs) for perovskite solar cells (PSCs) is still one of the most thrilling research subjects in the development of this emerging photovoltaic technology. Inner ring engineering of the aromatic core of new HTMs –consisting in three fused rings endowed with four triarylamine units– reveals major performance effects over the fabricated devices. In particular, substitution of the central pyrrole ring in dithienopyrrole (DTP) by a benzene ring –benzodithiophene (BDT)– allows enhancing the power conversion efficiency from 15.6% to 18.1%, in devices employing mixed-perovskite (FAPbI3)0.85(MAPbBr3)0.15 (MA: CH3NH3 +, FA: NH=CHNH3 +) under 1 sun illumination. In comparison, 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) yielded 17.7%. The novel HTM molecules show an efficient quenching of the perovskite photoluminescence, indicating an efficient charge transfer from the active layer to the HTM, along with a good conductivity (comparable to that of spiro-OMeTAD reference). Density functional theory (DFT) calculations allowed rationalizing the electrochemical and optical properties, and predict a reorganization energy (λ) for the best performing BDT-based HTM (0.101 eV) significantly lower than that computed for the benchmark spiro-OMeTAD (0.139 eV).
PB Royal Society of Chemistry
SN 2050-7488
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/93371
UL https://hdl.handle.net/20.500.14352/93371
LA eng
NO Sandoval-Torrientes, R., et al. «Hole Transporting Materials Based on Benzodithiophene and Dithienopyrrole Cores for Efficient Perovskite Solar Cells». Journal of Materials Chemistry A, vol. 6, n.o 14, 2018, pp. 5944-51.  https://doi.org/10.1039/C7TA11314E.
NO European Commission
NO Comunidad de Madrid
NO Ministerio de Economía y Competitividad (España)
NO Generalitat Valenciana
DS Docta Complutense
RD 8 abr 2025