Synthesis and properties of new low band gap semiconducting polymers

Low band gap organic semiconducting polymers were prepared as p-type donors for organic photovoltaic devices. A novel dibrominated monomer composed of phenothiazine, thiophene, and benzothiadiazole (DPDTBT) was synthesized as a low band gap core block. DPDTBT was copolymerized with three different b...

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Published inJournal of nanoscience and nanotechnology Vol. 14; no. 7; p. 5187
Main Authors Kim, Ji-Hoon, Kang, Jun, Mi, Dongbo, Xu, Fei, Jin, Sung-Ho, Chun, Ho-Hwan, Hwang, Do-Hoon
Format Journal Article
LanguageEnglish
Published United States 01.07.2014
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Summary:Low band gap organic semiconducting polymers were prepared as p-type donors for organic photovoltaic devices. A novel dibrominated monomer composed of phenothiazine, thiophene, and benzothiadiazole (DPDTBT) was synthesized as a low band gap core block. DPDTBT was copolymerized with three different boronic esters of dithiophene, fluorene, and phenothiazine by the Suzuki coupling polycondensation reaction. The band gap energies of the synthesized polymers ranged between 2.05 and 2.11 eV, depending on the polymer structure. Bulk heterojunction solar cells fabricated using the polymers and [6,6]-phenyl C71-butyric acid methyl ester (PC70BM) as an acceptor were characterized. The best power conversion efficiency obtained from the fabricated devices under simulated AM 1.5 G solar irradiation of 100 mW/cm2 was 0.46%.
ISSN:1533-4880
DOI:10.1166/jnn.2014.8426