Polymer electrolyte liquid crystal mixtures as phase-dependent thermoelectric materials |
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| Authors: | Suhana Mohd Said Shahrir Razey Sahamir Mohd Faizul Mohd Sabri Muhammad Akmal Kamarudin Kei Hayashi Ahmad Zulazlan Shah Zulkifli |
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| Institution: | 1. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Malaysia;2. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Malaysia;3. Centre of Molecular Materials for Photonics and Electronics, Department of Engineering, University of Cambridge, United Kingdom;4. Department of Applied Physics, Graduate School of Engineering, Tohoku University, Japan |
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| Abstract: | Organic thermoelectric materials have gained a trajectory in recent years given its advantages of processability, low cost and flexibility. In this paper, polymer electrolyte liquid crystal (PELC) mixtures composed of polyvinyl alcohol, potassium iodide, and 4-Cyano-4'-pentylbiphenyl (5CB) liquid crystal are fabricated, the 5CB acts as a ‘temperature switch’, i.e., a strong correlation between the thermoelectric properties and the transition from Ne-Iso transition of the 5CB, is observed. The electrical conductivity and Seebeck coefficient of the PELC mixtures both decrease above the Ne-Iso transition temperature. This thermoelectric behavior is discussed in terms of the carrier concentration, carrier mobility, and order-disorder transition. |
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| Keywords: | Liquid crystal Organic thermoelectric Order-disorder transition Polymer electrolyte |
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