期刊
ADVANCED MATERIALS
卷 34, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202104786
关键词
Ag; Se-2; aqueous selenization reaction; flexible thermoelectric power generators; maximum output power density; thin films
类别
资金
- National Natural Science Foundation of China [52072327, 21975265, 21673200, 61504117]
- Youth Talents Lifting Project of Henan Province [2018HYTP010]
- Zhongyuan Thousand Talents (Zhongyuan Scholars) Program of Henan Province [202101510004]
- Construction and Practice of OPCE System for Cultivating Innovation Ability of Science and Engineering Students in Chinese Local University, Higher Education and Teaching Reformation Project [2014SJGLX064]
- JST Mirai Program [JPMJMI19A1]
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [19IRTSTHN026]
- Program for Zhongyuan Leading Talents of Science and Technology Innovation in Henan Province [204200510016]
An efficient room-temperature aqueous selenization reaction is designed to fabricate thin beta-Ag2Se films with optimized thermoelectric properties, which can be useful for flexible thermoelectric devices.
Aiming to overcome both the structural and commercial limitations of flexible thermoelectric power generators, an efficient room-temperature aqueous selenization reaction that can be completed in air within less than 1 min, to directly fabricate thin beta-Ag2Se films consisting of perfectly crystalline and large columnar grains with both in-plane randomness and out-of-plane [201] preferred orientation, is designed. A high power factor (PF) of 2590 +/- 414 mu W m(-1) K-2 and a figure-of-merit (zT) of 1.2 +/- 0.42 are obtained from a sample with a thickness of approximate to 1 mu m. The maximum output power density of the best 4-leg thermoelectric generator sample reach 27.6 +/- 1.95 and 124 +/- 8.78 W m(-2) at room temperature with 30 and 60 K temperature differences, respectively, which may be useful in future flexible thermoelectric devices.
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