期刊
NANO ENERGY
卷 93, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106789
关键词
Thermoelectric; Single-piece; Organic materials; Heat rectifying; Solar thermoelectric generator
类别
资金
- National Natural Science Foundation of China [51876151]
- Key Research and Development Program in Shaanxi Province of China [2021GXLH-Z-056]
- Fundamental Research Funds for the Central Universities
- World-Class Universities (Disciplines)
- Characteristic Development Guidance Funds for the Central Universities [PY3A010]
- Xi'an Jiaotong University [QY1J003]
- HPC platform, Xi'an Jiaotong University
- Instrument Analysis Center of Xi'an Jiaotong University
- H2 Cluster
A new junction-free all-in-one single-piece solar thermoelectric generator with heat-rectifying structure has been developed, achieving high power output and flexibility. The device showed promising performance in flexible organic thermoelectric devices, outperforming conventional thermoelectric generators.
Junctions existing in conventional thermoelectric generators (TEGs) may lower their output power by increasing the internal resistances and reduce their flexibility, especially for organic TEGs. In this paper, we reported a new junction free all-in-one single-piece (SP) solar thermoelectric generator which was scissored from a free-standing carbon nanotube thin film with patterned p/n modules. In addition, a heat-rectifying structure has been designed to increase the temperature gradient between the hot/cold side of the TEG. A high sunlight-to-electricity output power of 1709.2 nW was obtained for the SP device, which is about 4.5 times higher than that of the conventional-structure TEG (Con-TEG). The highest output power density of this SP device is about 83 times higher than that of the Con-TEG because this fully organic SP device does not contain heavy metal moieties as connectors that typically appear in the Con-TEGs. Moreover, the junction-free SP device exhibited excellent flexibility which can be bent for 1000 times without noticeable decay and fluctuations in its conductance. While the Con-TEG cracked after being bent for only 100 times. The results indicate a promising way for developing high performance flexible organic thermoelectric devices.
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