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Synthesis of organic semiconductor bearing B <- N bridged thienylthiazole and diketopyrrolopyrrole for the applicaton of high open-circuit voltage organic photovoltaics

Title
Synthesis of organic semiconductor bearing B <- N bridged thienylthiazole and diketopyrrolopyrrole for the applicaton of high open-circuit voltage organic photovoltaics
Authors
Kim, Won-SukKim, KyungkonRyu, Ka YeonSung, Dan-BiWon, Suk-YoungJo, AraAhn, KyusangKim, Hyun YeongArulKashmir, ArulrajKwak, KyungwonLee, Chongmok
Ewha Authors
이종목김원석김경곤
SCOPUS Author ID
이종목scopus; 김원석scopus; 김경곤scopus
Issue Date
2018
Journal Title
DYES AND PIGMENTS
ISSN
0143-7208JCR Link1873-3743JCR Link
Citation
vol. 149, pp. 858 - 866
Publisher
ELSEVIER SCI LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
New small molecular semiconductors with small band gap and low-lying highest occupied molecular orbital (E-HOMO) namely TBDPPOT, TBDPPEH, and TBDPPEHT4 were synthesized by incorporating the B <- N bridged thienylthiazole and diketopyrrolopyrrole (DPP) derivatives. TBDPPOT and TBDPPEH were prepared, respectively, using two different DPPs having 1-octyl and 2-ethylhexyl moiety as the solubilizing group. In addition, the band gap of the TBDPPEH is further reduced by introducing planar thienothiophene unit, which was used for the preparation of TBDPPEHT4. These synthesized SMs are blended with fullerene derivative to construct a photo-active layer for organic photovoltaics. Among OPVs utilizing those SMs, the TBDPPEH exhibits highest power conversion efficiency of 3.21% with an exceptionally high V-OC of 0.92 V, which is ascribed to low-lying HOMO energy level of -5.62 eV. It is expected that the utilization of TBDPPEH as a photo-active layer for OPVs would enhance the oxidation stability of the OPVs.
DOI
10.1016/j.dyepig.2017.11.060
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자연과학대학 > 화학·나노과학전공 > Journal papers
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