期刊论文详细信息
High-temperature thermoelectric properties of n-type PbSe doped with Ga, In, and Pb
Article
关键词: EFFICIENCY;    FIGURE;    ENHANCEMENT;    THERMOPOWER;    CARRIERS;    SILICON;    MERIT;    MASS;   
DOI  :  10.1103/PhysRevB.83.195209
来源: SCIE
【 摘 要 】

We report a systematic study of the thermoelectric properties of PbSe doped with Ga, In, and excess Pb as a function of carrier density and temperature. All metal dopants efficiently generate electron carriers in the crystal lattice with densities as high as similar to 10(20) cm(-3) measured by the Hall effect. The Seebeck coefficient as a function of carrier density at room temperature was found to be similar for all dopants, while at 700 K substantial differences were observed with PbSe-In exhibiting a larger response. Infrared spectral reflectivity measurements at room temperature showed that both Ga and In substitution in PbSe weakens the curvature of the dispersion relation of the conduction band compared to Pb. This electronic effect contributes a larger density of states in transport processes at high temperatures. We have obtained thermoelectric figures of merit of similar to 0.9 at 900 K, exceeding that of PbTe for T > 800 K.

【 授权许可】

Free   

  文献评价指标  
  下载次数:0次 浏览次数:2次