Photoconductivity in Organic Pigments for Electrophotography Measured by Microwave Method
1991 Volume 30 Issue 4 Pages 403-410
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1991 Volume 30 Issue 4 Pages 403-410
Photoconductivity in organic pigment as the charge carrier generation material for electrophotography was studied by means6fmicrowave method. In the microcrystal of β-form metal free phthalocyanine (β-H2&mdot;Pc), the photo-generated carrier life time was 10.5 ms. Under the electric fields of 1.3 × 102 - 103 V/cm, microwave photoconductivity was constant in spite of increase in electric field. When 2, 4, 5, 7-tetranitro Fuorenone (TeNF) was added to microcrystal surface of H2&mdot;Pc, the microwave photoconductivity was increased remarkably because of interaction between H2&mdot;Pc and TeNF molecules.
Through the measurement of Q (quality factor) change of cavity with some volume samples, it was found that the microwave (x-band) ac conductivity of β-H2&mdot;Pc was 1.1 × 10-5 S&mdot;cm-1.
In perylene derivative pigment (N, N'-3, 5-xylyl-3, 4, 9, 10-perylenetetracarboxylic diimide), it was ascertained that microwave photoconductivity was consistent with electrophotographic sensitivity of double layered photoreceptor.
