DC conduction mechanism in polyvinyl alcohol films doped with potassium thiocyanate |
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| Affiliation: | 1. Physics Science and Engineering Technology College, Yichun University, Yichun 336000, People''s Republic of China;2. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, People''s Republic of China;3. School of Physics and Electronics, Central South University, Changsha 410083, People''s Republic of China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The current–voltage characteristics of pure polyvinyl alcohol (PVA) films and those doped with potassium thiocyanate (KSCN) are studied as a function of film temperature and dopant concentration. The conduction mechanisms operative in the films in different temperature and voltage ranges are estimated from the behaviour of log I versus V1/2 plots (I=current, V=voltage). For undoped (pure) films, the conduction mechanism appears to be essentially a Schottky type. On doping, there is considerable influence on the type of conduction mechanism, especially at lower temperatures. At higher temperatures, however, there is no significant effect of doping on the conduction mechanism. |
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