Nb掺杂Mo1-xWxSeTe固溶体的热-电输运性能优化

Nb掺杂Mo_1-_xW_xSeTe固溶体的热-电输运性能优化

周星圆,柳伟,张程,华富强,张敏,苏贤礼,唐新峰

Optimization of Thermoelectric Transport Properties of Nb-doped Mo_1-_xW_xSeTe Solid Solutions

ZHOU Xingyuan,LIU Wei,ZHANG Cheng,HUA Fuqiang,ZHANG Min,SU Xianli,TANG Xinfeng

表1 Nb₂_yMo_0.5-_yW_0.5-_ySeTe (0≤y≤0.035)固溶体的组成和室温热电输运性质

Table 1 Compositions and transport parameters of Nb₂_yMo_0.5-_yW_0.5-_ySeTe (0≤y≤0.035) solid solutions at room temperature

Sample	Actual composition	p/(×10²⁰, cm^-3)	μ/(cm²·V^-1·s^-1)		σ/(×10⁴, S·m^-1)		S/(μV·K^-1)
Sample	Actual composition	p/(×10²⁰, cm^-3)	⊥P	//P	⊥P	//P	⊥P	//P
y=0	Mo_0.54W_0.46Se_0.93Te_0.94	0.16	0.79	0.26	0.02	0.01	22.4	42.0
y=0.005	Mo_0.53W_0.47Se_0.99Te_1.09	1.53	1.37	1.32	0.33	0.32	17.2	15.1
y=0.015	Nb_0.03Mo_0.51W_0.46Se_0.93Te_0.96	5.96	2.95	2.52	2.82	2.40	102	93.1
y=0.025	Nb_0.04Mo_0.44W_0.52Se_0.97Te_0.95	6.61	5.45	4.80	5.76	5.07	65.9	70.9
y=0.035	Nb_0.05Mo_0.51W_0.43Se_0.90Te_0.86	7.63	5.72	4.29	6.98	5.24	53.2	52.0