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Cited 4 time in webofscience Cited 4 time in scopus
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A series of selenium-containing non-fullerene acceptors with side chain engineering for organic solar cells

Authors
Oh, J.Park, H.Y.Kim, J.-H.Chen, S.Lee, S.Kim, J.Song, X.Kang, H.Jang, S.-Y.Kwon, S.-K.Kim, Y.-H.Lee, K.
Issue Date
Nov-2022
Publisher
Elsevier BV
Keywords
Non-fullerene acceptors; Organic solar cells; Selenium; Side-chain engineering; Thermal stability
Citation
Dyes and Pigments, v.207
Indexed
SCIE
SCOPUS
Journal Title
Dyes and Pigments
Volume
207
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/791
DOI
10.1016/j.dyepig.2022.110646
ISSN
0143-7208
1873-3743
Abstract
Non-fullerene acceptors (NFAs) have been crucial in improving the efficiency of organic solar cells (OSCs) due to their attractive properties, such as strong light-harvesting ability, easily tunable energy levels, and high crystallinity. Nevertheless, general NFAs have limited light absorption, and studies on the design of NFAs that can absorb a broad range of the solar spectrum and that offer complementary absorption to that of donors should be conducted. Because selenium, a chalcogen element, can induce strong intermolecular Se?Se interactions, planarity, and extended effective conjugated length in OSC materials, NFAs with selenium usually exhibit redshifted absorption. Here, we synthesized a series of selenium-containing non-fullerene acceptors with different inner alkyl chain lengths, named Se-Y6-BO (2,2'-((2Z, 2′Z)-((12,13-bis(2-butyloctyl)-3,9-dinonyl-12,13-dihydroselenopheno[2″,3'':4′,5']thieno[2′,3':4,5]pyrrolo[3,2-g]selenopheno[2′,3':4,5]thieno [3,23,2-b] [1,2,5]thiadiazolo [3,43,4-e]indole-2,10-diyl)bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile) and Se?Y6-HD (2,2'-((2Z, 2′Z)-((12,13-bis(2-hexyldecyl)-3,9-dinonyl-12,13-dihydroselenopheno[2″,3'':4′,5']thieno[2′,3':4,5]pyrrolo[3,2-g]selenopheno[2′,3':4,5]thieno [3,23,2-b] [1,2,5]thiadiazolo [3,43,4-e]indole-2,10-diyl)bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile). The optical absorption of two selenium-containing NFAs was redshifted compared with that of Y6 due to the effect of selenium atoms in the backbone. The PM6:Se-Y6-BO-based devices achieved a power conversion efficiency (PCE) of 13.8% with an open-circuit voltage (VOC) of 0.81 V, short-circuit current density (JSC) of 24.4 mA cm?2, and a fill factor of 0.70. Similarly, the OSCs based on PM6:Se?Y6-HD achieved a PCE of 13.6% and a JSC of 23.7 mA cm?2. ? 2022 Elsevier Ltd
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공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles
자연과학대학 > 화학과 > Journal Articles

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