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- W1968578056 startingPage "18821" @default.
- W1968578056 abstract "Two new carbazole-based copolymers PT and PP carrying thienyl or phenyl, respectively, alternating segments and 4-nitrophenylcyanovinylene pendant groups attached to the carbazole nitrogen were synthesized and characterized. Their optical and electrochemical properties were investigated. Both copolymers showed broad absorption bands in the longer wavelength region, which is complementary to those of PC61BM and PC71BM acceptors, and showed optical band gaps about 1.64 eV and 1.69 eV for PT and PP, respectively. The deep lying HOMO energy level benefited a high open circuit voltage (Voc), leading to an overall power conversion efficiency (PCE) of 2.19%, 2.98% 2.02% and 2.54% for bulk heterojunction (BHJ) solar cells based on PT:PC61BM, PT:PC71BM, PP:PC61BM and PP:PC71BM blends, respectively, processed from tetrahydrofuran (THF) solvent. The BHJ solar cells based on PT:PC71BM and PP:PC71BM blends processed from THF and 1-chloronaphthalene (CN) mixed solvents showed overall PCE of about 5.39% and 4.20%, respectively. The increase in the overall PCE for the BHJ devices based on solvent additives was attributed to the balanced charge transport in the devices." @default.
- W1968578056 created "2016-06-24" @default.
- W1968578056 creator A5027528362 @default.
- W1968578056 creator A5033361593 @default.
- W1968578056 creator A5048882136 @default.
- W1968578056 creator A5089448505 @default.
- W1968578056 creator A5091142549 @default.
- W1968578056 date "2013-01-01" @default.
- W1968578056 modified "2023-10-16" @default.
- W1968578056 title "Synthesis and characterization of two carbazole-based alternating copolymers with 4-nitrophenylcyanovinylene pendant groups and their use as electron donors for bulk heterojunction solar cells" @default.
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