RT Journal Article
T1 High-Efficiency Perovskite Solar Cells using Molecularly-Engineered, Thiophene-Rich,Hole-Transporting Materials: Influence of Alkyl Chain Length on Power Conversion Efficiency
A1 Zimmermann, Iwan
A1 Urieta Mora, Javier
A1 Gratia, Paul
A1 Aragó, Juan
A1 Grancini, Giulia
A1 Molina-Ontoria, Agustín
A1 Ortí, Enrique
A1 Martín, Nazario
A1 Khaja Nazeeruddin, Mohammad
AB The synthesis and characterization of a series of novel small-molecule hole-transporting materials (HTMs) based on an anthra[1,2-b:4,3-b′:5,6-b′′:8,7-b′′′]tetrathiophene (ATT) core are reported. The new compounds follow an easy synthetic route and have no need of expensive purification steps. The novel HTMs were tested in perovskite solar cells (PSCs) and power conversion efficiencies (PCE) of up to 18.1 % under 1 sun irradiation were 2 measured. This value is comparable with the 17.8 % efficiency obtained using spiroOMeTAD as a reference compound. Similarly, a significant quenching of the Photoluminescence in the first nanosecond is observed, indicative of effective hole transfer.Additionally, the influence of introducing aliphatic alkyl chains acting as solubilizers on the device performance of the ATT molecules is investigated. Replacing the methoxy groups on the triarylamine sites by butoxy-, hexoxy- or decoxy-substituents greatly improved the solubility of the compounds without changing the energy levels, yet at the same time significantly decreasing the conductivity as well as the PCE, 17.3 % for ATT-OBu, 15.7 % for ATT-OHex and 9.7 % for ATT-ODec.
PB Wiley Online Library
SN 1614-6840 (Online) 1614-6832 (Print)
YR 2016
FD 2016-11-21
LK https://hdl.handle.net/20.500.14352/17661
UL https://hdl.handle.net/20.500.14352/17661
LA eng
NO Unión Europea. FP7
NO Unión Europea. H2020
NO European Research Council (ERC)
NO Comunidad de Madrid
NO Ministerio de Economía y Competitividad (MINECO)
NO Generalitat Valenciana
DS Docta Complutense
RD 9 abr 2025