Ambipolar Carrier Mobility in Binary Blend Thin Film of Non-Peripheral Alkylphthalocyanines

India-Japan Expert Group Meeting on Biomolecular Electronics & Organic Nanotechnology for Environment Preservation

物理学;生物科学;生态环境科学

Fujii, Akihiko^1 ; Nakano, Shohei^1 ; Fukui, Hitoshi^1 ; Saito, Takashi^1 ; Ohmori, Masashi^1 ; Shimizu, Yo^2 ; Ozaki, Masanori^1

Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka

565-0871, Japan^1

Synthetic Nano-Function Materials Group, Research Institute for Ubiquitous Energy Devices, Kansai Center, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka

563-8577, Japan^2

关键词: Binary blends;    Blend films;    Blend ratios;    High mobility;    Molecular packing structure;    Phthalocyanine derivatives;    Temperature dependence;    Time-of-flight techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/704/1/012006/pdf
DOI  :  10.1088/1742-6596/704/1/012006

来源: IOP

【 摘 要 】

Charge carrier mobility in blend films of two types of soluble phthalocyanine derivatives with different substituent length, 1, 4, 8, 11, 15, 18, 22, 25-octapentyl-phthalocyanine (C5PcH2) and 1, 4, 8, 11, 15, 18, 22, 25-octahexyl-phthalocyanine (C6PcH2) has been investigated. The charge carrier mobility was measured by the time-of-flight technique. In the case of C5PcH2blend ratio below 25 mol%, the high mobility, such as 0.8-1.1 cm2V-1s-1for hole and 0.6 cm2V-1s-1for electron, were obtained at room temperature. In the thin films with C5PcH2above 30 mol%, the charge carrier mobility decreased by one order of magnitude and had the different temperature dependence from that below 25 mol%. The marked change of the charge carrier mobility depending on the blend ratio of phthalocyanine derivatives has been discussed by taking the miscibility and the molecular packing structure into consideration.