聚苯乙炔的伏安特性

聚苯乙炔的伏安特性周淑琴（中国科学院化学研究所北京１０００８０）关键词聚苯乙炔，伏 安特性，欧姆电导，空间电荷限制电流，高斯分布陷阱能级，陷阱态密度聚苯乙炔（ＰＰＡ）是一种具有π电子的共轭高分子聚合物，它的光电导特性引起了同行的兴趣［１］．目前高分...

CURRENT VOLTAGE CHARACTERISTICS IN POLY(PHENYL ACETYLENE)S

Measurements of the current in Poly(phenyl acetylene)s with different configuration (PPAs) as a function of the voltage were carried out at temperatures between 233 and 300K. The current voltage dependence is of J∝V n type. Under the lower applied field the exponent n 1,it showed ohmic behavior, while the Space Charge Limited Current (SCLC) was observed at the high applied field the exponent 8≥ n ≥3. A conductivity and conducting activation energy were obtained in the ohmic range. Using the SCLC theory, the trap level with Gaussion distribution of trap energy has been found. The trap energy agrees closely with the apparent activation energy observed for conduction, indicating that the dark conduction of the PPAs is by no means intrinsic one but a manifestation of thermal detrapping.