Journal
NANO ENERGY
Volume 34, Issue -, Pages 463-471Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.03.020
Keywords
Thin-film thermoelectric device; Light concentration; Integration design; Energy harvesting; Light sensing
Categories
Funding
- State Key Program of National Natural Science Foundation of China [61534001]
- National Natural Science Foundation of China [51601005]
- Fundamental Research Funds for the Central Universities
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In this study, we prepared a multi-functional thin-film thermoelectric device for small-scale energy harvesting and self-powered light sensing. A comprehensive optimization was conducted in terms of thermoelectric material, device, and system integration. The thermoelectric thin films in the device were prepared using the sputtering method together with a post-annealing process. A Fresnel lens was incorporated into the thin-film thermoelectric device for energy concentration. In addition, a simulation procedure was used to facilitate the optimization of the heat sink, which can provide fast heat dissipation and mechanical support for the thin-film thermoelectric device. The electricity generation and light sensing performance was then characterized under solar irradiation, followed by a feasibility study for sensor application. The results indicate that our thin-film thermoelectric device exhibits high voltage output and greatly enhanced responsivity. This work presents a significant progress toward an integrated design of an applicable and multifunctional thin-film thermoelectric sensor for detecting sunlight intensity.
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