1Institute of Material Physics, Tianjin University of Technology, Tianjin 300384 2Key Laboratory of Display Material and Photoelectric Devices (Ministry of Education), Tianjin University of Technology, Tianjin 300384 3Singapore Institute of Manufacturing Technology, 71 Nanyang Drive 638075, Singapore
Abstract：We investigate the phthalocyanine derivative organic field-effect transistors (OFETs) using a novel para -quaterphenyl (p-4p) as the inducing layer. Compared to the devices without the p-4p inducing layer, the performances of p-type (copper phthalocyanine) and n-type (fluorinated copper phthalocyanine) OFETs with optimized thickness of p-4p thin films are greatly enhanced. Both the field-effect mobility and the on/off ratio of the two-type devices are improved by one order of magnitude compared to those of the control devices. This remarkable improvement is attributed to the introduction of p-4p, which can form a highly oriented and continuous phthalocyanine derivative film with the molecular π–π stack direction parallel to the substrate.
2014, Vol. 31 
