Title :
Estimation of carrier mobility using space charge measurement technique
Author :
Hozumi, N. ; Muramoto, Y. ; Nagao, M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Toyohashi Univ. of Technol., Japan
Abstract :
The carrier mobility in a ethylene-vinylacetate copolymer (EVA) film was measured by a new technique. The time-dependent charge distribution in an EVA film was monitored by the pulsed-electroacoustic method when a pulse voltage was superposed on a DC bias voltage. A positive charge packet injected from the anode was observed soon after the pulse application, and traveled towards the cathode. It was suggested from the movement of the charge packet, that the mobility of the positive carrier at 0.1-0.6 MV/cm was in the order of 10-9 cm2/Vs at room temperature. When the pulse voltage was very high, a charge packet appeared originating from the bulk, suggesting that the carrier dissociation takes place
Keywords :
acoustoelectric effects; carrier mobility; polyethylene insulation; polymer blends; polymer films; space charge; 293 K; DC bias voltage; carrier dissociation; carrier mobility; ethylene-vinylacetate copolymer film; positive charge packet; pulsed-electroacoustic method; space charge; time-dependent charge distribution; Current measurement; Dielectric materials; Dielectric measurements; Electrodes; Hall effect; Measurement techniques; Pulse measurements; Semiconductor materials; Space charge; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.804660