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Polymer solar cells (PSCs) have achieved great progress recently, benefiting from the rapid development of narrow bandgap small molecule acceptors and wide bandgap conjugated polymer donors. Among the polymer donors, the D–A copolymers with quinoxaline (Qx) as A‐unit have received increasing attention since the report of the low‐cost and high‐performance D–A copolymer donor based on thiophene D‐unit...
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