Photoconduction and electrical transport in polypropylene

Author

Hui, Zhang ; Hengkun, Xie ; Ziyu, Liu

Author_Institution

Dept. of Electr. Eng., Xi´´an Jiaotong Univ., China

fYear

1991

fDate

8-12 Jul 1991

Firstpage

995

Abstract

The photoconduction of polypropylene was measured. Based on experimental results on photoconduction current (I_photo) spectra, V-I characteristics, and the temperature dependence of I_photo, it was found that, at low applied field, photoconduction processes such as carrier injection and transport take place in localized states instead of the conduction band; at high applied field, the prebreakdown current results from the trapped electrons emitted into the vacuum level and drifting in microvoids in polypropylene. Therefore, the conduction band plays no role in conduction processes until breakdown

Keywords

electric breakdown of solids; electrical conductivity of amorphous semiconductors and insulators; high field effects; localised electron states; organic insulating materials; photoconductivity; polymers; V-I characteristics; carrier injection; conduction processes; electrical transport; high applied field; localized states; microvoids; photoconduction current; polypropylene; prebreakdown current; temperature dependence; trapped electrons; Electric breakdown; Electric variables measurement; Electrodes; Electron emission; Electron traps; Photoconductivity; Photonic band gap; Polymers; Thermal conductivity; Vacuum breakdown;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on

Conference_Location

Tokyo

Print_ISBN

0-87942-568-7

Type

conf

DOI

10.1109/ICPADM.1991.172240

Filename

172240