Eur. Phys. J. Appl. Phys.
Volume 43, Number 1, July 2008
|Page(s)||37 - 41|
|Section||Semiconductors and Devices|
|Published online||19 June 2008|
Electrical parameters and gas sensing behaviour of ClInPc thin film devices
Applied Physics Division, Physics Department, Tarbiat Moallem University,
49 Mofateh Avenue, Tehran, Iran
2 Advanced Materials and Photonics group Physics Department, Lancaster University, LA14YB, UK
Corresponding author: email@example.com
Revised: 29 April 2008
Accepted: 8 May 2008
Published online: 19 June 2008
The electrical characteristics of thermally evaporated Chloroindium phthalocyanine thin films (ClInPc) are studied. A number of parameters are evaluated on the basis of the theory of space-charge-limited conduction. ClInPc thin films are extremely stable, in terms of both resistance to chemical attack and thermally, no hysteretic was observed after temperature cycling between room temperature and 500 K. DC current-voltage and current-temperature characteristics were obtained for ClInPc in vacuum and on exposure to dry air (20% O2) in both the dark and under illumination with visible light. The conductivity data were analysed in the framework of band theory to elucidate information about the activation energy Eac, forbidden band gap , domain or acceptor energy levels (). In the present work we also examine the response of ClInPc to O2 and NO2 at different temperatures.
PACS: 85.30.-z – Semiconductor devices / 07.07.Df – Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing / 85.30.Fg – Bulk semiconductor and conductivity oscillation devices (including Hall effect devices, space-charge-limited devices, and Gunn effect devices) / 42.70.Nq – Other nonlinear optical materials; photorefractive and semiconductor materials
© EDP Sciences, 2008
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