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Article

Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics

1
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
2
Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, CA 91125, USA
3
Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10608, Taiwan
4
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
*
Authors to whom correspondence should be addressed.
Academic Editor: Seth B. Darling
Polymers 2016, 8(11), 382; https://doi.org/10.3390/polym8110382
Received: 30 September 2016 / Revised: 21 October 2016 / Accepted: 22 October 2016 / Published: 27 October 2016
(This article belongs to the Special Issue Conjugated Polymers 2016)
A series of novel p-type conjugated copolymers, PTTVBDT, PTTVBDT-TPD, and PTTVBDT-DPP, cooperating benzo[1,2-b:4,5-b′]dithiophene (BDT) and terthiophene-vinylene (TTV) units with/without thieno[3,4-c]pyrrole-4,6-dione (TPD) or pyrrolo[3,4-c]pyrrole-1,4-dione (DPP) via Stille polymerization were synthesized and characterized. Copolymer PTTVBDT shows a low-lying HOMO energy level and ordered molecular-packing behavior. Furthermore, two terpolymers, PTTVBDT-TPD and PTTVBDT-DPP, display stronger absorption ability, alower-lying HOMO energy level, and preferred molecular orientation, due to the replacement TTV-monomer units with electron-deficient groups. Furthermore, bulk-heterojunction organic solar cells were fabricated using blends of the PTTVBDT-TPD, and PC61BM gave the best power conversion efficiency of 5.01% under the illumination of AM 1.5G, 100 mW·cm−2; the short circuit current (Jsc) was 11.65 mA·cm−2 which displayed a 43.8% improvement in comparison with the PTTVBDT/PC61BM device. These results demonstrate a valid strategy combining the two-dimensional molecular structure with random copolymerization strikes promising conjugated polymers to achieve highly efficient organic photovoltaics. View Full-Text
Keywords: two-dimensional conjugated polymer; polymer solar cell; benzo[1,2-b:4,5-b′]dithiophene; thieno[3,4-c]pyrrole-4,6-dione; pyrrolo[3,4-c]pyrrole-1,4-dione; conjugated side chain. two-dimensional conjugated polymer; polymer solar cell; benzo[1,2-b:4,5-b′]dithiophene; thieno[3,4-c]pyrrole-4,6-dione; pyrrolo[3,4-c]pyrrole-1,4-dione; conjugated side chain.
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MDPI and ACS Style

Hsiow, C.-Y.; Wang, H.-Y.; Lin, Y.-H.; Raja, R.; Rwei, S.-P.; Chiu, W.-Y.; Dai, C.-A.; Wang, L. Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics. Polymers 2016, 8, 382. https://doi.org/10.3390/polym8110382

AMA Style

Hsiow C-Y, Wang H-Y, Lin Y-H, Raja R, Rwei S-P, Chiu W-Y, Dai C-A, Wang L. Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics. Polymers. 2016; 8(11):382. https://doi.org/10.3390/polym8110382

Chicago/Turabian Style

Hsiow, Chuen-Yo; Wang, Han-Ying; Lin, Yu-Hsiang; Raja, Rathinam; Rwei, Syang-Peng; Chiu, Wen-Yen; Dai, Chi-An; Wang, Leeyih. 2016. "Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics" Polymers 8, no. 11: 382. https://doi.org/10.3390/polym8110382

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