典型文献
Enhanced near-room-temperature thermoelectric performance in GeTe
文献摘要:
GeTe is an excellent mid-temperature thermo-electric material with high dimensionless figure of merit(ZT)values at temperatures over 600 K.Its near-room-temperature performance is less studied due to the intrinsic high carrier concentration.Here,we successfully enhance the Seebeck coefficient of GeTe from~30 to 220 μV·K-1 at 300 K,which is achieved by AgInSe2 alloying and Bi doping.It is demonstrated that Bi doping helps to optimize the Seebeck coefficient without deterio-rating the intrinsic electrical transport properties of the matrix.A high room-temperature power factor(PF)of~11 μW·cm-1·K-2 is achieved for a wide range of Bi-doped samples.The simultaneously introduced abundant point defects cause mass and strain fluctuations,which decrease the lattice thermal conductivity(κL)to a low value of 0.6 W·m-1·K-1 at 300 K.Due to the synergetic effects of Bi doping in AgInSe2-alloyed GeTe,a high room-temperature ZT value of 0.46 is obtained together with a high ZT value of 1.1 at 523 K.
文献关键词:
中图分类号:
作者姓名:
Xian Yi Tan;Jin-Feng Dong;Ning Jia;Hong-Xia Zhang;Rong Ji;Ady Suwardi;Zhi-Liang Li;Qiang Zhu;Jian-Wei Xu;Qing-Yu Yan
作者机构:
School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore;Institute of Materials Research and Engineering,Agency for Science,Technology and Research,Singapore 138634,Singapore;Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province,College of Physics Science and Technology,Hebei University,Baoding 071002,China
文献出处:
引用格式:
[1]Xian Yi Tan;Jin-Feng Dong;Ning Jia;Hong-Xia Zhang;Rong Ji;Ady Suwardi;Zhi-Liang Li;Qiang Zhu;Jian-Wei Xu;Qing-Yu Yan-.Enhanced near-room-temperature thermoelectric performance in GeTe)[J].稀有金属(英文版),2022(09):3027-3034
A类:
AgInSe2
B类:
Enhanced,near,room,thermoelectric,performance,GeTe,is,excellent,mid,material,high,dimensionless,figure,merit,ZT,values,temperatures,over,Its,studied,due,intrinsic,carrier,concentration,Here,successfully,enhance,Seebeck,coefficient,from,which,achieved,by,alloying,Bi,doping,demonstrated,that,helps,optimize,without,deterio,rating,electrical,transport,properties,matrix,power,PF,wide,range,doped,samples,simultaneously,introduced,abundant,point,defects,cause,mass,strain,fluctuations,decrease,lattice,thermal,conductivity,low,Due,synergetic,effects,alloyed,obtained,together
AB值:
0.545732
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