Photoconductivity and photovoltaic effect of charge-transfer complex of poly[4-phenyl-2,6--(p-phenoxy) quinoline] and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone
- Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Polymer Chemistry Lab.
A new polymer containing a heterocyclic quinoline unit in the main chain,poly[4-phenyl-2,6-(p-phenoxy) quinoline] (PQ), was synthesized by an acid-catalyzed self-condensation reaction. The authors have found that PQ, which is generally a good insulator itself, can show photoconductivity when doped with an electron acceptor. From the UV-VIS absorption spectra, they found that PQ can form a charge-transfer (CT) complex with an electron acceptor, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ). The CT complex of the PQ-DDQ mixture showed distinct photoconductivity. Employing the DDQ composition ranging from 5 to 10 wt %, the ratio of dark and photoconductivity was calculated to be about 1: 100 at an applied electric field of 10[sup 5] V/cm. Additionally,the bilayer sample of PQ/DDQ exhibited a significant photovoltaic current increased with increasing photointensity. The open-circuit voltage was measured ranging from 0.4 to 0.7 V and the photovoltaic conversion efficiency was calculated to be [sup [minus]3]--10[sup [minus]2]%. The PQ film treated with DDQ vapor showed a relatively higher photovoltaic effect than that of the sample treated with DDQ solution.
- OSTI ID:
- 5849195
- Journal Information:
- Journal of Applied Polymer Science; (United States), Vol. 50:8; ISSN 0021-8995
- Country of Publication:
- United States
- Language:
- English
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