It′s all about polymers: All-polymer solar cells (all-PSCs) based on six perylene diimide containing polymers (PX–PDIs) as acceptor materials and two polythiophene derivatives (P3HT and PT1) as donor materials were investigated systematically (see picture). The highest power-conversion efficiency (PCE) of all-PSCs was 2.23 %, one of the highest PCEs of polymer/polymer blend photovoltaic devices reported to date.
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