ELECTRICAL-CONDUCTIVITY OF POLY(PARA-PHENYLENE VINYLENE) FILMS DOPED WITH FECL3

被引:7
作者
MERTENS, R [1 ]
NAGELS, P [1 ]
CALLAERTS, R [1 ]
BRIERS, J [1 ]
GEISE, HJ [1 ]
机构
[1] UNIV INSTELLING ANTWERP,DEPT CHEM,B-2610 WILRIJK,BELGIUM
关键词
D O I
10.1016/0379-6779(93)90472-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Highly oriented films of poly(p-phenylene vinylene), PPV, were prepared by uniaxial stressing during the thermal conversion of a sulphonium polyelectrolyte precursor polymer. The molecular orientation is studied by infrared dichroism as a function of the stretch ratio. Electrical conductivity data of FeCl3-doped PPV films obtained between 80 and 300 K provides evidence that conduction occurs by variable-range hopping in unstretched films and by fluctuation induced tunneling in highly stretched films. The room temperature conductivity parallel sigma(parallel-to) and perpendicular sigma(perpendicular-to) to the stretch direction shows an anisotropy sigma(parallel-to)/sigma(perpendicular-to) equal to 13.
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页码:3538 / 3543
页数:6
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