Synthesis and thermoelectric properties of Bi2O2Se nanosheets
Synthesis and thermoelectric properties of Bi2O2Se nanosheets
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Bi2O2Se纳米片的合成及其热电性能
DOI：
10.1016/j.materresbull.2013.06.013
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发表时间：
2013-10-01
影响因子：
5.4
通讯作者：
Liu, Hong
中科院分区：
文献类型：
--
作者：
Zhang, Kaiyou;Hu, Chenguo;Liu, Hong
采用复合熔盐法在200 ℃下合成了纯的四亚甲基硒化铋纳米片。场发射扫描电子显微镜，X-射线衍射，能量色散X-射线光谱被用来表征样品的结构，形貌和组成。结果表明，纳米片的厚度约为120 nm。采用冷压法制备了热电性能测试样品。测量了从室温到470 K的热电性能，包括电导率、塞贝克系数和热导率。结果表明，样品具有较低的热导率（kappa（300）= 0.346 Wm（-1）K-1，kappa（470）= 0.458 Wm（-1）K-1），表现出n型半导体特性。虽然得到的优值很小，但它会随着温度的升高而提高。(c)2013爱思唯尔有限公司保留所有权利。
The pure tetragonal bismuth oxiselenide nanosheets are synthesized by the composite-molten-salt approach at 200 degrees C. Field emission scanning electron microscopy, X-ray diffraction, and energy dispersive X-ray spectroscopy are used to characterize the structure, morphology, and composition of the sample. The results show that the thickness of the nanosheets is about 120 nm. The sample for thermoelectric property measurements is prepared using cold pressing method. Thermoelectric properties, including electrical conductivity, Seebeck coefficient and thermal conductivity, are measured from room temperature to 470 K. The results show that the sample exhibits n-type semiconductor behavior with low thermal conductivity (kappa(300) = 0.346 Wm(-1) K-1, and kappa(470) = 0.458 Wm(-1) K-1). Although the obtained figure of merit is small, it would be enhanced with increase in temperature. (c) 2013 Elsevier Ltd. All rights reserved.