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New benzodithiophene fused electron acceptors for benzodithiophene-based polymer

Authors
Sun, ChengLee, SanseongKim, Myeong-JongKim, JaeyoungOh, JuhuiPark, ByoungwookCheon, Hyung JinRyu, Jong MinKang, HongkyuJang, Soo-YoungKim, KihyunLee, KwangheeKim, Yun-Hi
Issue Date
Dec-2021
Publisher
ELSEVIER SCI LTD
Keywords
Benzodithiophene fused acceptor; Nonfullerene acceptor; Film morphology; Surface energy; Organic solar cell
Citation
DYES AND PIGMENTS, v.196
Indexed
SCIE
SCOPUS
Journal Title
DYES AND PIGMENTS
Volume
196
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/2885
DOI
10.1016/j.dyepig.2021.109756
ISSN
0143-7208
Abstract
We designed and synthesised two fused electron acceptors based on 6,6,12,12-tetrakis (3-hexylphenyl)-indacenobis (benzodithiophene) with two-dimensional alkylthiophene or alkylthiothiophene substituents, named ETBDTIC and ESTBDTIC, respectively. ESTBDTIC exhibited red-shift absorption and deeper the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels compared with ETBDTIC. The ESTBDTIC based device exhibited slightly lower open-circuit voltage (V-oc) because of its deeper LUMO level that originated from the electron-withdrawing thioalkyl group, while short-circuit current density (J(sc)) and fill factor (FF) of ESTBDTIC were much higher than the J(sc) and FF of ETBDTIC. The ETBDTIC-based device displayed power conversion efficiency (PCE) of 5.11% with a Voc of 0.96 V, J(sc) of 11.24 mA/cm(2), and FF of 47.30%; the corresponding values of ESTBDTIC-based device were 7.78%, 0.92 V, 13.92 mA/cm(2), and 60.50%. The electronic properties, charge transport, crystallinity, film morphology, and surface energy, and photovoltaic characteristics were studied.
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자연과학대학 > 화학과 > Journal Articles
공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles

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자연과학대학 (화학과)
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