Abstract
AbstractA Charge‐transfer (CT) states in bulk heterojunction (BHJ) solar cells play a decisive role in determining the characteristics and performance of the devices. The photophysical processes of CT states are closely investigated in a perylene based BHJ and a fullerene‐based BHJ. Comparison of the band‐tail photocurrent, PL/EL and morphology reveal the role of molecular structure‐property correlation on charge generation processes. The inference drawn from these results points to decreased early recombination losses at the polymer‐perylene interface and possibility of realizing higher efficiencies in such non‐fullerene systems compared to PC71BM based systems.
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