Non-fused Nonfullerene Acceptors with an Asymmetric Benzo[1,2-b:3,4-b', 6,5-b"]trithiophene (BTT) Donor Core and Different AcceptorTerminal Units for Organic Solar Cells.

Autor: Khokhlov AR; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Keshtov ML; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Shikin DY; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Godovsky DY; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Sergeev VN; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Liu J; Changchun Institute of Applied Chemistry CAS, Ren Min Street, Changchun, 130022, P.R. China., Kalinkin DP; A.N. Nesmeyanov Institute of Organoelement compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation., Alekseev VG; Department of Inorganic and Analytical Chemistry, Tver State University, Sadovyiper. 35, Tver, 170002, Russian Federation., S SS; Department of Physics and Electronics Communication Engineering, The LNM Institute of Information Technology, Jamdoli, Jaipur (Raj.), 302031, India., Sharma GD; Department of Physics and Electronics Communication Engineering, The LNM Institute of Information Technology, Jamdoli, Jaipur (Raj.), 302031, India.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2024 Dec 18; Vol. 30 (71), pp. e202403193. Date of Electronic Publication: 2024 Nov 09.
DOI: 10.1002/chem.202403193
Abstrakt: Here in, we have designed two new unfused non-fullerene small molecules using asymmetric benzo[1,2-b:3.4-b', 6,5-b"]trithiophene (BTT) as the central donor core and different terminal units i. e., 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (NFA-4) and 1,3-diethyl-2-thioxodi hydropyrimidine-4,6 (1H,5H)-dione (NFA-5) and examined their optical and electrochemical properties. Using a wide band-gap copolymer D18, organic solar cells (OSCs) based on bulk heterojunction 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 (J SC ), open circuit voltage (V OC ), and fill factor (FF). Following the addition of small amount of NFA-5 to the binary bulk 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 for the binary counterparts and attributed to the increased values of J SC , FF, and V OC . The higher value of J SC is linked to the efficient use to excitons transferred from NFA-5 to NFA-4 with a greated dipole moment than NFA-5 and subsequently dissociated into a free charge carrier efficiently.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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