NDLI: Synthesis and photovoltaic performance of donor–acceptor copolymers based on thieno[3,2-b]quinoxaline

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Ying Xie, Zhiyuan Wang, Lixiang Tong, Hui
Copyright Year	2013
Abstract	Two new donor–acceptor copolymers containing carbazole and thieno[3,2-b]quinoxaline units with meta- and para-positioned alkoxy groups on the peripheral phenyl rings, PCTTQx-m and PCTTQx-p, were designed and synthesized. Their thermal stability, UV-Vis absorptions, energy levels and photovoltaic properties were investigated. Compared with their quinoxaline analogues using carbazole and quinoxaline derivatives as donor and acceptor units, by simply fusing a thiophene ring to the quinoxaline unit, PCTTQx-m and PCTTQx-p not only exhibit lower bandgaps (∼1.8 eV) but also maintain deep HOMO energy levels (∼−5.3 eV). A polymer solar cell based on PCTTQx-m with the structure ITO/PEDOT:PSS/polymer:PC71BM/LiF/Al showed a promising PCE of 4.40% with a rather high open circuit voltage of 0.89 V, a short circuit current of 9.03 mA cm−2 and a fill factor of 0.54, which was higher than that of PCTTQx-p (3.45%). After solvent vapor annealing treatment, the PCE of the polymer solar cell based on a PCTTQx-m/PC71BM blend film could be further improved to 5.31%.
Starting Page	2884
Ending Page	2890
Page Count	7
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	4
Issue Number	9
Journal	Polymer Chemistry
DOI	10.1039/c3py00148b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Quinoxaline HOMO\/LUMO Poly(3,4-ethylenedioxythiophene) Organic solar cell Electronvolt Polymer Phenyl group Thiophene Carbazole Solar cell Short circuit Solvent Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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