Synthesis and Opto-Electrical Properties of Novel Conjugated Small Molecule Bearing a B <- N Moiety
- 주제(키워드) organic solar cell , B-N containing dye , small molecule organic solar cell , stability
- 주제(기타) Polymer Science
- 설명문(일반) [Ryu, Ka Yeon; Sung, Dan-Bi; Kwon, Yong-Ju; Kim, Hyun Yeong; Lee, Chongmok; Kim, Won-Suk; Kim, Kyungkon] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS, KCI등재
- 발행기관 POLYMER SOC KOREA
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000174974
- 본문언어 영어
- Published As http://dx.doi.org/10.1007/s13233-020-8113-1
초록/요약
Effects of the B <- N unit on the energy level of conjugated small molecule were investigated by synthesizing a new small moleculeBPDPP(3,8-bis(5-(2,5-dioctyl-3,6-dioxo-4-(thiophen-2-yl)-2,3,5,6-tetrahydropyrrolo[3,4-c]pyrrol-1-yl)-thiophen-2-yl)-6,6-dioctyl-6H-benzo[3,4] [1,2]azaborolo[1,5-a]pyridin-5-ium-6-uide)viaSuzuki coupling. For comparison,CPDPP(6,6 '-(5,5 '-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-dioctyl-3-(thiophen-2-yl)pyrrolo[3,4-c] pyrrole-1,4(2H,5H)-dione)) having the same chemical structure withBPDPPexcept the B <- N unit is synthesized through the same coupling reaction. Absorption spectra and cyclovoltammetry analysis for these small molecules revealed that the B <- N unit reduces the band gap ofBPDPPby maintaining large oxidation potential. As a result, the blend film ofBPDPPand PC71BM maintained 87.4% of the initial absorption intensity after 1sun light soaking test for 315 h. The photo stability of theBPDPPis significantly higher than the blend film of P3HT: PC71BM, which maintained only 19.8% of the initial absorption intensity only after light soaking for 23 h.
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