.Electrical properties of Copper(II) phthalocyanine derivative thin films[J].Optoelectronics Letters,2007,3(1):43-46 Electrical properties of Copper(II) phthalocyanine derivative thin films WANG Ting-ting HE Zhi-qun ZHENG Xiao-pan WANG Yong-sheng ZHANG Chun-xiu ZHANG Wen-guan [1]Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China [2]Lab of Printing ＆ Packaging Material and Technology-Beijing Area Major Laboratory, Beijing Institute of Graphic Communication, Beijing 102600, China Abstract:       This paper reports an investigation on the electrical properties of thin film devices made by Copper(II) phthalocyanine derivative and polycarbonate (PC) composite. The conducting and injection mechanism are further discussed. Materials of a variety composition were prepared into the thin film via spin-coating. ITO and aluminum were used as the bottom and top electrode respectively. J-V characteristic was measured and the result demonstrates that at a small bias region an Ohmic contact was achieved. As the forward bias increased, the current became space charge limited. The result of AC impedance measurement indicates the device could be equivalent to a parallel RC system. The introduction of PC into the CuPc possibly reduces the charge overlapping between the aromatic rings and led to a reduction in the molecular interaction. Hence, the ac conductivity decreases sharply as PC composition increases. But no change in the transport mechanism is found. This work is supported by National Natural Science Foundation of China (20674004 and 10434030), State Key Program for Basic Research of China (2003CB314707), and Lab of Printing & Packaging Material & Technology-Beijing Area Major Laboratory, Open project (KF060303). Hits: 3645 Download times: 218 View Full Text    Download reader