NDLI: Sensitization effect in conducting polyaniline by rhodamine 6G

Content Provider	Springer Nature Link
Author	Somani, Prakash R. Radhakrishnan, S.
Copyright Year	2002
Abstract	Rhodamine 6G (R6G), an n-type dye, has been employed at small concentrations (0–15 mM/monomer) for sensitizing conducting polyaniline (PANI) in solid-state photocells with the configuration Au/PANI/SPE+R6G/ITO. It is observed that a p–n junction is formed at the PANI/dye interface. The photosensitivity factor (S) is observed to be maximum at a dye concentration of 6.3 mM/monomer. The variation of the dark (I$_{d}$) and light (I$_{l}$) current with respect to the dye concentration in the linear portion of the current–voltage (I–V) characteristic reveals that light current goes through a maximum whereas dark current remains more or less constant. Thus, it is the variation of the light current (I$_{l}$) that is more important and is one of the reasons for maximum photosensitivity at a certain dye concentration. The mechanism of the dye-sensitization process is explained on the basis of the energy band diagram of the materials forming the photocell. The observed photosensitivity is due to the lowering of the potential barrier in the presence of light at the PANI/dye interface.
Starting Page	735
Ending Page	741
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	13
Issue Number	12
e-ISSN	1573482X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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