García Benito, InésZimmermann, IwanUrieta Mora, JavierAragó, JuanMolina Ontoria, AgustínOrtí, EnriqueMartín León, NazarioNazeeruddin, Mohammad Khaja2025-01-232025-01-232017-03-07García-Benito, Inés, et al. «Isomerism Effect on the Photovoltaic Properties of Benzotrithiophene-Based Hole-Transporting Materials». Journal of Materials Chemistry A, vol. 5, n.o 18, 2017, pp. 8317-24.2050-74882050-749610.1039/c7ta00997fhttps://hdl.handle.net/20.500.14352/115891Engineering of inorganic–organic lead halide perovskites for photovoltaic applications has experienced significant advances in recent years. However, the use of the relatively expensive spiro-OMeTAD as a hole-transporting material (HTM) poses a challenge due to dopant-induced degradation. Herein we introduce two new three-armed and four-armed HTMs (BTT-4 and BTT-5) based on isomeric forms of benzotrithiophene (BTT). The isomerism impact on the optical, electrochemical and photophysical properties and the photovoltaic performance is systematically investigated. Perovskite solar cells (PSCs) using BTT-4 and BTT-5 as HTMs show remarkable light-to-energy conversion efficiencies of 19.0% and 18.2%, respectively, under standard measurement conditions. These results validate the readily available BTT heteroaromatic structure as a valuable core for the design of highly efficient HTMs for the preparation of PSCs.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://doi.org/10.1039/C7TA00997Fhttps://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta00997fopen access547Química orgánica (Química)2306 Química Orgánica