We report the synthesis of two barbiturate end-capped non-fullerene acceptors and demonstrate their efficient function in high voltage output organic solar cells. The acceptor with the lower LUMO level is shown to exhibit suppressed geminate recombination losses, resulting in enhanced photocurrent generation and higher overall device efficiency.
Bibliographical noteKAUST Repository Item: Exported on 2020-04-23
Acknowledged KAUST grant number(s): OSR-2015-CRG4-2572
Acknowledgements: The authors acknowledge KAUST for the funding (OSR-2015-CRG4-2572) and KAUST Center Competitive Fund. CH thanks MyBrainSc for PhD scholarship. SAJ and SS acknowledge funding under US NSF (CBET-1435912).