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Photocurrent spectral responses in poly(2,5-dimethoxy-p-phenylenevinylene) devices

Narayan, KS and Gautam, KS and Shivakumar, B and Ramakrishnan, S (1996) Photocurrent spectral responses in poly(2,5-dimethoxy-p-phenylenevinylene) devices. In: Synthetic Metals, 80 (3). pp. 239-242.

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We report the spectral response of the photocurrent in the sandwich configuration of poly (2,5-dimethoxy-p- phenylenevinylene) (DMPPV) devices. The photocurrent spectral responses are dependent on the polarity of the illuminated surface and the electrodes. The polarity-dependent photocurrent is modeled on a basis where charge carrier drift plays a dominant mechanism and hole transport is predominant over electron transport. The model can explain the results for the Au/DMPPV/Au symmetric configuration. The model cannot however explain the results for the indium-tin oxide (ITO) /DMPPV/Al device. The response for the light incident on the Al side is also reported. The spectral dependence is also studied as a function of bias electric field. Mechanisms leading to the behavior of the photocurrent spectral dependence are speculated.

Item Type: Journal Article
Publication: Synthetic Metals
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Poly(2,5-dimethoxy-p-phenylenevinylene);Devices;Photocurrent;Spectral response
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 15 May 2007
Last Modified: 19 Sep 2010 04:38
URI: http://eprints.iisc.ac.in/id/eprint/10967

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