Study on Low-Band Gap Polymers Based on Diketopyrrolopyrrole for Organic Photovoltaic Applications

Two kinds of low-band gap polymers, poly[{N-(1-octyldecyl)-2,7-carbazole)}-alt-{3,6-bis(phenylene-1,4-diyl)-2,5-di(1-octyldecyl)-2,5-dihydropyrrolo[3,4]pyrrole-1,4-dione}], poly(Cvz-PhDPP) and poly[{N-(1-octyldecyl)-2,7-carbazole)}-alt-{3,6-bis(pyridinyl-5-yl)-2,5-di(1-octyldecyl)-2,5-dihydropyrrolo...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2013, Vol.578 (1), p.55-62
Main Authors: Song, Ho-Sung, Ahn, Sung Kwang, Karthikeyan, N. S., Gal, Yong-Soon, Jin, Sung-Ho, Lee, Jae Wook
Format: Article
Language:English
Subjects:
Aluminum
Band gap
Crystals
diketopyrrolopyrrole
Electric potential
Energy conversion efficiency
organic photovoltaics
Photovoltaic cells
Polymerization
Polymers
Solar cells
Voltage
π-conjugated polymer
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Summary:Two kinds of low-band gap polymers, poly[{N-(1-octyldecyl)-2,7-carbazole)}-alt-{3,6-bis(phenylene-1,4-diyl)-2,5-di(1-octyldecyl)-2,5-dihydropyrrolo[3,4]pyrrole-1,4-dione}], poly(Cvz-PhDPP) and poly[{N-(1-octyldecyl)-2,7-carbazole)}-alt-{3,6-bis(pyridinyl-5-yl)-2,5-di(1-octyldecyl)-2,5-dihydropyrrolo[3,4]pyrrole-1,4-dione}], poly(Cvz-PyDPP), were synthesized by palladium-catalyzed Suzuki polymerization. Bulk heterojunction solar cells with an ITO/PEDOT/polymer:PC 71 BM/LiF/Al configuration were fabricated, which shows open-circuit voltage, short-circuit current density, fill factor, and power conversion efficiency of 0.76 V, 4.01 mA/cm 2 , 0.35, and 1.07% under AM 1.5 irradiation (100 mW/cm 2 ), respectively.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2013.804371