Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/103039
Title: Synthesis and characterization of thieno[3,2-b]thiophene-isoindigo-based copolymers as electron donor and hole transport materials for bulk-heterojunction polymer solar cells
Authors: Xu, Xiaofeng
Cai, Ping
Lu, Yong
Choon, Ng Siu
Chen, Junwu
Hu, Xiao
Ong, Beng S.
Keywords: DRNTU::Science::Chemistry
Issue Date: 2012
Source: Xu, X., Cai, P., Lu, Y., Choon, N. S., Chen, J., Hu, X., et al. (2013). Synthesis and characterization of thieno[3,2-b]thiophene-isoindigo-based copolymers as electron donor and hole transport materials for bulk-heterojunction polymer solar cells. Journal of Polymer Science Part A: Polymer Chemistry, 51(2), 424-434.
Series/Report no.: Journal of polymer science part A : polymer chemistry
Abstract: A novel class of thieno[3,2-b]thiophene (TT) and isoindigo based copolymers were synthesized and evaluated as electron donor and hole transport materials in bulk-heterojunction polymer solar cells (BHJ PSCs). These π-conjugated donor-acceptor polymers were derived from fused TT and isoindigo structures bridged by thiophene units. The band-gaps and the highest occupied molecular orbital (HOMO) levels of the polymers were tuned using different conjugating lengths of thiophene units on the main chains, providing band-gaps from 1.55 to 1.91 eV and HOMO levels from −5.34 to −5.71 eV, respectively. The corresponding lowest unoccupied molecular orbital (LUMO) levels were appropriately adjusted with the isoindigo units. Conventional BHJ PSCs (ITO/PEDOT:PSS/active layer/interlayer/Al) with an active layer composed of the polymer and PC71BM were fabricated for evaluation. Power conversion efficiency from a low of 1.25% to a high of 4.69% were achieved with the best performing device provided by the D−π−A polymer with a relatively board absorption spectrum, high absorption coefficient, and more uniform blend morphology. These results demonstrate the potential of this class of thieno[3,2-b]thiophene-isoindigo-based polymers as efficient electron donor and hole transport polymers for BHJ PSCs.
URI: https://hdl.handle.net/10356/103039
http://hdl.handle.net/10220/19144
ISSN: 0887-624X
DOI: 10.1002/pola.26400
Rights: © 2012 Wiley Periodicals, Inc.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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