Title :
Electrode effect on carrier injection in polyvinyl pyrrolidone: polymethyl methacrylate polyblend films
Author :
Jain, Vivek ; Khare, P.K.
Author_Institution :
Dept. of Phys., Solid State Lab., Sagar, India
Abstract :
Mechanism of charge production and its persistent in polyvinyl pyrrolidone (PVP), polymethyl methacrylate (PMMA) and their polyblend films have been analysed using short circuit thermally stimulated discharge current (TSDC) technique as a function of electrode metal with constant polarizing field (3.5×104 volts/cm) and polarizing temperature (70°C). The TSDC spectra of PMMA consist of a sharp peak around 155-170°C, for Al-Ag/Cu systems, however. The TSDC spectra of PVP and polyblend films have been found to be characterized with two peaks located around 90-100°C and 140-160°C along with an additional current maxima which has been found around 205±50° C in a direction which is opposite to both the peaks. The observed polarization is explained in terms of existence of hetero charge due to dipole orientation and detrapping of charges injected from the electrodes with subsequent space-charge formation
Keywords :
dielectric polarisation; electrets; organic insulating materials; polymer blends; polymer films; space charge; thermally stimulated currents; 140 to 160 C; 155 to 170 C; 205 C; 70 C; 90 to 100 C; carrier injection; charge production; charges detrapping; constant polarizing field; current maxima; dipole orientation; electrode effect; polarizing temperature; polyvinyl pyrrolidone-polymethyl methacrylate polyblend films; short circuit thermally stimulated discharge current; space-charge formation; Contacts; Electrets; Electrodes; Glass; Optical films; Physics; Polarization; Polymer films; Temperature; Voltage;
Conference_Titel :
Electrets, 1994. (ISE 8), 8th International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-1940-0
DOI :
10.1109/ISE.1994.514791
