[17p-P6-1~34] 12.3 Functional Materials and Novel Devices

[17p-P6-2] Photoconducting oligomer-insulating polymer blend for photorefractive materials

〇Koya Izumida^1,2, K.-L Wang⁴, Masaki Horie³, Takashi Hujihara⁴, Takeo Sasaki², Takahumi Sassa¹ (1.RIKEN, 2.Tokyo Univ. Sci, 3.TsingHua Univ., 4.ISIT)

Keywords:Photorefractive effect, Polymer blend, Photorefractive oligomer

The control of carrier trapping is important for photorefractive polymers. We focus on hole transporting triarylamine oligomer-insulating polymer blends and investigated the effect of the average molecular weight of the oligomer on carrier trapping. We found that carrier trapping was strengthened in the one with lowered oligomeric average molecular weight. In addition, photoconductivity related basic properties were evaluated on the polymer blend by the transient photocurrent measurement, time-of-flight measurement, and photoemission yield spectroscopy in air.