NDLI: Novel donor–acceptor type conjugated polymers based on quinoxalino[6,5-f]quinoxaline for photovoltaic applications

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Novel donor–acceptor type conjugated polymers based on quinoxalino[6,5-f]quinoxaline for photovoltaic applications

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Correction: Triphenylamine-based donor–π–acceptor organic phosphors: synthesis, characterization and theoretical study

Materials Chemistry Frontiers Vol - 1 Issue - 2

Materials Chemistry Frontiers Vol - 1 Issue - 1

Novel donor–acceptor type conjugated polymers based on quinoxalino[6,5-f]quinoxaline for photovoltaic applications

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Guichuan Huang, Fei Duan, Chunhui He, Baitian Liu, Liqian Liu, Shengjian
Copyright Year	2017
Abstract	The field of polymer solar cells has undergone tremendous advancement in terms of power conversion efficiency in the past decade. However, there is still an urgent requirement to further enhance device performance for achieving large-scale commercialization. Here, we report the design and synthesis of three novel conjugated polymers alternatively copolymerized by a newly developed 2,3,8,9-tetrakis(3-(alkoxy)phenyl)-6,12-di(thiophen-2-yl)-2,3,8,9-tetrahydroquinoxalino[6,5-f]quinoxaline (DTNQx) acceptor unit and a conventional two-dimensional alkylthienyl-substituted benzodithiophene (BDT) unit. These polymers possess an identical main chain but different side chains. The structure–property relationship is systematically studied. All polymers exhibit an optical bandgap around 1.7 eV and a HOMO energy level around −5.16 eV. Compared with the quinoxaline unit, fused quinoxaline DTNQx leads to a downshifted HOMO energy level in the resulting polymers by 0.04 eV while keeping the bandgap unchanged. By changing the side chain length and by introducing branched side chains, polymer properties including absorption spectra and hole mobilities could be finely tuned. Under optimal conditions, polymer P2 shows the highest hole mobility of 2.7 × 10−4 cm2 V−1 s−1 and the best photovoltaic performance, with Jsc = 9.1 mA cm−2, Voc = 0.88 V, FF = 48%, and PCE = 3.8%.
Starting Page	499
Ending Page	506
Page Count	8
File Format	HTM / HTML PDF
ISSN	20521529
Volume Number	1
Issue Number	3
Journal	Materials Chemistry Frontiers
DOI	10.1039/c6qm00130k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Solar cell Quinoxaline BDT HOMO\/LUMO Electronvolt Polymer Jsc Phenyl group Band gap
Content Type	Text
Resource Type	Article

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