We report the fabrication of organic Schottky diodes on indium tin oxide (ITO) coated glass by electrochemically polymerized polycarbazole (PCz) with configuration ITO/PCz/Al. The diode has been characterized in respect of electrical and optical properties. The study involves estimation of optical bandgap of the polymer from UV-visible spectroscopic measurements. The current-voltage and capacitance-voltage characteristics of the Schottky diode were subsequently used for extracting electronic parameters of the device such as ideality factor, barrier height, reverse saturation current, built-in potential, depletion width, doping concentration, etc. The photoresponse of the Schottky contact was measured by illuminating the device with a laser source operating at 650 nm having an incident optical power density of . The device exhibits a high value of peak detectivity near zero bias voltage and the same attains a value of the order of at a reverse bias of −6 V.
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1 June 2009
Research Article|
June 03 2009
Electronic and optical properties of electrochemically polymerized polycarbazole/aluminum Schottky diodes
Arun Kumar Singh;
Arun Kumar Singh
1School of Materials Science and Technology, Institute of Technology,
Banaras Hindu University
, Varanasi-221005, India
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A. D. D. Dwivedi;
A. D. D. Dwivedi
2Department of Electronics Engineering, Centre for Research in Microelectronics, Institute of Technology,
Banaras Hindu University
, Varanasi-221005, India
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P. Chakrabarti;
P. Chakrabarti
2Department of Electronics Engineering, Centre for Research in Microelectronics, Institute of Technology,
Banaras Hindu University
, Varanasi-221005, India
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Rajiv Prakash
Rajiv Prakash
a)
1School of Materials Science and Technology, Institute of Technology,
Banaras Hindu University
, Varanasi-221005, India
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]. Tel./FAX: +91-542-2368707.
J. Appl. Phys. 105, 114506 (2009)
Article history
Received:
November 21 2008
Accepted:
April 29 2009
Citation
Arun Kumar Singh, A. D. D. Dwivedi, P. Chakrabarti, Rajiv Prakash; Electronic and optical properties of electrochemically polymerized polycarbazole/aluminum Schottky diodes. J. Appl. Phys. 1 June 2009; 105 (11): 114506. https://doi.org/10.1063/1.3139277
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