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Electrical properties of dysprosium phthalocyanine films |
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| Affiliation: | 1. Lab of Chemical Materials and Devices, College of Xiangyang Noncommissioned Officers, Xiangyang 441118, PR China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China;3. Baotou Research Institute of Rare Earths, Baotou 014040, PR China;4. Mathematics and Information College, Langfang Teachers University, Langfang 065000, PR China;1. Key Laboratory of Green Chemical Engineering and Technology of College of Heilongjiang Province, College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin 150080, China;2. School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China |
| Abstract: | Forty-four nanometers thick films of alkyl-substituted dysprosium phthalocyanine molecules were prepared on carefully cleaned indium tin oxide (ITO) substrates by the spin casting method. UV–vis absorption spectra and dc conduction characteristics were obtained in order to investigate the structure–conduction property relationship. The conduction is Ohmic at low applied voltages but the space charge limited mechanism is prevalent at relatively high voltages. The conductivities of both as-deposited and heat treated films are found to show directionally anisotropic behaviour. The columnar conductivity was found to be significantly large in the liquid crystalline state. |
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