کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5369530 | 1388438 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrical properties and dielectric relaxation of thermally evaporated zinc phthalocyanine thin films Electrical properties and dielectric relaxation of thermally evaporated zinc phthalocyanine thin films](/preview/png/5369530.png)
The electrical transport properties and dielectric relaxation of Au/zinc phthalocyanine, ZnPC/Au devices have been investigated. The DC thermal activation energy at temperature region 400-500Â K is 0.78Â eV. The dominant conduction mechanisms in the device are ohmic conduction below 1Â V and space charge limited conduction dominated by exponential trap distribution in potentials >1Â V. Some parameters, such as concentration of thermally generated holes in valence band, the trap concentration per unit energy range at the valence band edge, the total concentration of traps and the temperature parameter characterizing the exponential trap distribution and their relation with temperatures have been determined. The AC electrical conductivity, Ïac, as a function of temperature and frequency has been investigated. It showed a frequency and temperature dependence of AC conductivity for films in the temperature range 300-400Â K. The films conductivity in the temperature range 400-435Â K increased with increasing temperature and it shows no response for frequency change. The dominant conduction mechanism is the correlated barrier hopping. The temperature and frequency dependence of real and imaginary dielectric constants and loss tangent were investigated.
Journal: Applied Surface Science - Volume 254, Issue 6, 15 January 2008, Pages 1852-1858