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Role of Charge‐Transfer State in Perylene‐Based Organic Solar Cells
Author(s) -
Shivanna Ravichandran,
Rajaram Sridhar,
Narayan K. S.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801134
Subject(s) - perylene , photocurrent , polymer solar cell , organic solar cell , fullerene , materials science , charge (physics) , heterojunction , polymer , chemical physics , optoelectronics , chemistry , molecule , solar cell , physics , organic chemistry , quantum mechanics , composite material
A 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 PC 71 BM based systems.