Bulk Heterojunction Organic Photovoltaic Cell Fabricated with a p-Type Conjugated Star-shaped Molecule

A new multibranched crystalline molecule was synthesized through Horner–Emmons reactions using hexyl-substituted thiophene-based carbaldehydes as dendrons and benzene-1,2,4,5-tetramethylphosphonic acid octaethyl ester as the core unit. The molecule was employed to fabricate organic photovoltaic (OPV...

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Published in:Chemistry letters 2008-08, Vol.37 (8), p.866-867
Main Authors: Lee, Tae Wan, Kim, Dae Cheol, Kang, Nam Su, Yu, Jae Woong, Cho, Min Ju, Kim, Kyung Hwan, Choi, Dong Hoon
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container_title Chemistry letters
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creator Lee, Tae Wan
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description A new multibranched crystalline molecule was synthesized through Horner–Emmons reactions using hexyl-substituted thiophene-based carbaldehydes as dendrons and benzene-1,2,4,5-tetramethylphosphonic acid octaethyl ester as the core unit. The molecule was employed to fabricate organic photovoltaic (OPV) cells with methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM). Poly(3-hexylthiophene) (P3HT) was also used as a dopant to improve the film quality and power conversion efficiency. As a result, the short-circuit current density and open circuit voltage were increased when P3HT was added into 4(HPBT) and PCBM dyad, resulting in a higher power conversion efficiency of around 0.6%.
doi_str_mv 10.1246/cl.2008.866
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title Bulk Heterojunction Organic Photovoltaic Cell Fabricated with a p-Type Conjugated Star-shaped Molecule
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