Non‐fused nonfullerene acceptors with asymmetric benzo[1,2‐b:3,4‐b', 6,5‐b"]trithiophene (BTT) central donor core and different acceptor terminal units for organic solar cells

Sharma, G.D.; Khokhlov, A.R.; Keshtov, M.L.; Shikin, D.Y.; Godovsky, D.Y.; Sergeev, V.N.; Liu, J.; Kalinkin, D.P.; Alekseev, V.G.; S, S.S.

Авторы: Sharma Ganesh D., Khokhlov A.R., Keshtov M.L., Shikin D.Y., Godovsky D.Y., Sergeev V.N., Liu J., Kalinkin D.P., Alekseev V.G., S Shyam Shankar
Журнал: Chemistry - A European Journal
Год издания: 2024
Издательство: John Wiley & Sons Ltd.
Местоположение издательства: United Kingdom
Первая страница: 235
Последняя страница: 239
DOI: 10.1002/chem.202403193
Аннотация: Here in, we have designed two new unfused non-fullerene small molecules using asymmetricbenzo[1,2-b:3.4-b', 6,5-b"]trithiophene (BTT) as the central donor core and different terminal unitsi.e., 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (NFA-4) and 1,3-diethyl-2-thioxodihydropyrimidine-4,6 (1H,5H)-dione (NFA-5) and examined their optical and electrochemicalproperties. Using a wide band-gap copolymer D18, organic solar cells (OSCs) based on bulkheterojunction of D18: NFA-4 and D18:NFA-5 showed overall power conversion efficiency(PCE) of about 17.07% and 11.27 %, respectively. The increased PCE for the NFA-4-based OSC,compared to NFA-5 counterpart, is due higher value of short circuit current (JSC), open circuitvoltage (VOC), and fill factor (FF). Following the addition of small amount of NFA-5 to the binarybulk heterojunction D18:NFA-4, the ternary organic solar cells attained a PCE of 18.05 %,surpassing that of the binary counterparts due to the higher values of which is higher than that forthe binary counterparts and attributed to the increased values of JSC, FF, and VOC. The higher valueof JSC is linked to the efficient use to excitons transferred from NFA-5 to NFA-4 with a greateddipole moment than NFA-5 and subsequently dissociated into a free charge carrier efficiently.Key words: Unfused non fullerene acceptors, organic solar cells, energy transfer, powerconversion efficiency
Добавил в систему: Кештов Мухамед Лостанбиевич

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Non‐fused nonfullerene acceptors with asymmetric benzo[1,2‐b:3,4‐b', 6,5‐b"]trithiophene (BTT) central donor core and different acceptor terminal units for organic solar cellsстатья

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