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In article number 1801734, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Mohammad Khaja Nazeeruddin, and co‐workers conduct a systematic study on how heteroatoms in the central scaffold of star‐shaped hole‐transporting materials affect the photovoltaic efficiency of perovskite solar cells. Chalcogenide‐based derivatives achieve excellent performance rivalling the benchmark spiro‐OMeTAD.
Three new star‐shaped hole‐transporting materials (HTMs) incorporating benzotripyrrole, benzotrifuran, and benzotriselenophene central cores endowed with three‐armed triphenylamine moieties (BTP‐1, BTF‐1, and BTSe‐1, respectively) are designed, synthesized, and implemented in perovskite solar cells (PSCs). The impact that the heteroatom‐containing central scaffold has on the electrochemical and photophysical...
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