期刊
NPJ FLEXIBLE ELECTRONICS
卷 4, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41528-020-00082-9
关键词
-
资金
- A*STAR, Industry Alignment Fund, Pharos Hybrid thermoelectric materials for ambient applications Program [1527200019, 1527200021]
Transparent and flexible thermoelectrics has been highly sought after for future wearable devices. However, the main stumbling block to prevent its widespread adoption is the lack of p-type transparent thermoelectrics and the stringent criteria of electrical and thermal properties matching appropriately between p-legs and n-legs. This work demonstrates the fabrication of p-type PEDOT:PSS films whose optical properties, electrical conductivity, thermal conductivity, and Seebeck coefficient were engineered to perfectly match the n-type indium tin oxide (ITO) counterparts. The dense p-type PEDOT:PSS and n-type ITO thin films show a thermoelectric figure of merit of zT=0.30 and 0.29 at 450K, and a thermal conductivity of 0.22 and 0.32Wm(-1)K(-1), respectively. A flexible thermoelectric generator (TEG) module with a high transmittance of >81% in the visible wavelength range of 400-800nm is fabricated using 10 pairs of p-type PEDOT:PSS and n-type ITO thin film legs. An ultra-high power density of 22.2Wm(-2) at a temperature gradient of 80K was observed, which is the highest power density reported for organic/hybrid-based flexible TEGs so far. Our transparent flexible thin-film p-n junction thermoelectric module with exceptionally high power generation may take a tremendous step forward towards multi-functional wearable devices.
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