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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Synthesis of the Copolymer Based on Diketopyrrolopyrrole with Didecyl Chain for OPVs

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Title
Synthesis of the Copolymer Based on Diketopyrrolopyrrole with Didecyl Chain for OPVs
Author
Song, SuheeKo, Seo-JinKim, TaehyoShin, HyunminKim, IlKim, Jin YoungSuh, Hongsuk
Issue Date
2014-11
Publisher
TAYLOR & FRANCIS LTD
Citation
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.600, no.1, pp.88 - 98
Abstract
A new accepter unit, diphenylpyrrolo[3,2-b]pyrrole-2,5-dione with didecyl chain, was prepared and utilized for the synthesis of the conjugated polymer containing electron donor-acceptor pair for OPVs. The iDPP, part of the structure of a natural dye found in lichens, is the regioisomer of the known DPP with switched position of the carbonyl group and nitrogen atom. At the 4-positions of the N-substituted phenyl groups of 1,4-bis(4-butylphenyl)-pyrrolo[3,2-b]-pyrrole-2,5-dione unit in P-butyl, the butyl group was substituted with decyl group to increase solubility. The absorption spectrum of polymer with diphenylpyrrolo[3,2-b]pyrrole-2,5-dione unit exhibit two maximum peaks at about 365 and 542nm. The spectrum of the P1 as the solid thin film shows absorption band with maximum peaks at 370 and 536nm, and the absorption onset at 703nm, corresponding to band gap of 1.76eV. The oxidation and reduction potential onset of the synthesized polymer were estimated to be 0.84 and -1.22V, which correspond to HOMO and LUMO energy levels of -5.64 and -3.58eV, respectively. The devices comprising P1 with PC61BM annealed at 100 degrees C showed a V-OC of 0.79V, a J(SC) of 1.75mA/cm(2), and a FF of 0.31, leading to the power conversion efficiency of 0.43% under white light illumination (AM 1.5G, 100 mW/cm(2)).
URI
https://scholarworks.unist.ac.kr/handle/201301/9443
DOI
10.1080/15421406.2014.936791
ISSN
1542-1406
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