Co‐evaporant Induced Crystalline Donor: Acceptor Blends in Organic Solar Cells

Currently, major research efforts are focused on improving the cell effi ciency through optimization of the bulk heterojunction (BHJ) architecture, [ 6 ] a blend fi lm consisting of a mixture of donor ( p -type) component and acceptor ( n -type) component of various organic materials. High-effi ciency OSCs are mostly based on BHJs with a solution-cast blend fi lm of a conjugated polymer as the donor and a small molecule as the acceptor, [ 7–9 ]

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