摘要
利用放电等离子烧结技术制备了宽带隙三元半导体化合物CuIn5Se8,并对其热电性能进行了研究。物相分析表明,化合物为单相CuIn5Se8,带隙宽度为1.13eV,比In2Se3合金的低。电学性能测试结果表明,随温度升高Seebeck系数绝对值从370.0μV·K1降低到263.0μV·K1,而电导率则随温度迅速增大。在818K时,其电导率达到最大值2.921031·m1,热导率为0.50W·K1·m1,最高热电优值ZT值达到0.33。
Wide-gap ternary semiconductor CuInsSe8 was prepared by the spark plasma sintering technique, and its thermoelectric properties were evaluated at 318-818 K. XRD analysis and band gap measurement indicate that this ternary compound is single phase CuInsSea with its band gap of 1.13 eV, about 0.2 eV smaller than that of In2Se3. The magnitude of Seebeck coefficient decreases from 370.0 to 263.0μV·k^(-1), and electrical conductivity increases from 1,44×102 to 2.92×10^3Ω^(-1)·113^(-1) with the temperature increasing. The thermal conductivity is 0.50W·K^(-1)·m^(-1), and the maximum thermoelectric figure of merit ZT is 0.33 at 818 K.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第7期1474-1477,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51171084
50871056)
浙江省自然科学基金(Y4100182)
宁波市自然科学基金(2011A610093)