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conductivity of the undoped LaZnAsO epitaxial films was 0.2 S/cm at room temperature. The positive Seebeck coefficients of the epitaxial film indicated a p-type semiconductor. The optical bandgap of LaZnAsO... [1] KAYANUMA K, HIRAMATSU H, HIRANO M, KAWAMURA R, YANAGI H, KAMIYA T, HOSONO H. Apparent bipolarity and seebeck sign inversion in layered semiconductor: LaZnOP [J]. Phys Rev B, 2007, 76: 195325......
conductivity of the undoped LaZnOAs epitaxial films is 2.0×10-1 S/cm at room temperature, the Seebeck coefficient of the epitaxial film is positive and the optical bandgaps of LaZnOAs is estimated... findings for comparison. References [1] KAYANUMA K, HIRAMATSU H, HIRANO M, KAWAMURA R, YANAGI H, KAMIYA T, HOSONO H. Apparent bipolarity and Seebeck sign inversion in layered semiconductor: LaZnOP [J......
powders; homogeneous precipitation; preparation mechanism 近年来,由于能源与环境问题的日益突出,迫切希望能够发展一种可降低化石燃料,符合环保要求的绿色可再生能源技术.热电技术正是一种以热电材料为基础,实现热能与电能相互转化的环保能源技术.热电材料是一种具有热电效应的功能材料,热电效应包括Seebeck效应(用于发电)和Peltier效应(用于制冷).热电材料一般采用热电优值来表征其热电性能.热电优值越高,表示热电性能越好.热电材料要具有高的热电优值,则应具有高Seebeck系数,高电导率和低热导率[1-3].传统热电材料包括Bi-Te系列,Pb-Te系列和Si-Ge系列等,在高温下容易分解或氧化,影响其使用性能和寿命[4].自Terasaki等[5]研究发现层状结构的过渡金属氧化物NaCo2O4具有优异的热电性能以来,氧化物热电材料以其耐高温......
, the related thin films were prepared by PLD. The electrical properties, micrographs and laser induced voltage (LIV, the electric voltage is produced through the Seebeck effect when a temperature gradient... et al [28], the induced voltage is mainly determined by the Seebeck coefficient anisotropy DS, which includes the structural and electrical transport anisotropy [29]. As can be seen in Fig. 7......
), temperature gradients at the local solid/liquid interface should still exist. Due to the Seebeck effect, thermoelectric current in liquid metal will be produced [2,25]. The interaction... idea is that thermoelectric currents can be induced not only in the liquid but also in the solid owning to the Seebeck effect. Thus, TEMF will be produced to act on the dendrites. The magnitude order......
因子显著增大. Zhu等[7]研究了添加Sb2Te3的n型PbTe的热电性能, 发现添加后材料的热导率显著减小, 而Seebeck系数有所增大. 最近, Hsu等[8]发现, 在PbTe中添加Ag, Sb形成的多元AgPbmSbTem+2化合物热电材料在一定的温度范围具有相当大的ZT值. 当m=18, 材料在800K时表现出极好的热电性能, ZT值最高达2.2. 在600K至900K之间......
conductivity and Seebeck coefficient[A]. Proc 21st Inter Conf on Thermoelectrics, ICT′2002, IEEE[C]. Piscataway, USA: IEEE, 2002. 333-336. [9]Prieto A L, Sander M S, Martin-Gonzalez M S, et al......
, MARCHANT D D, GARNIER J E. Electrical conductivity, seebeck coefficient, and structure of In2O3-SnO2/[J]. American Ceramics Society Bulletin, 1986, 65(4): 673-678. [21] NADAUD N, LEQUEUS N, NANOT M......
