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RESEARCH PRODUCT

Isomerism effect on the photovoltaic properties of benzotrithiophene-based hole-transporting materials

Agustín Molina-ontoriaIwan ZimmermannInés García-benitoNazario MartínNazario MartínJuan AragóJavier Urieta-moraMohammad Khaja NazeeruddinEnrique Ortí

subject

Materials scienceRenewable Energy Sustainability and the EnvironmentPhotovoltaic systemGeneral Materials ScienceNanotechnology02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnology0210 nano-technology01 natural sciences0104 chemical sciencesPerovskite (structure)

description

Engineering 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.

yearjournalcountryeditionlanguage
2017-01-01
http://hdl.handle.net/20.500.12614/1407