Solvothermal synthesis and thermoelectric properties of lanthanum contained Bi–Te and Bi–Se–Te alloys

"Graphene-Like" Exfoliation of Atomically-Thin Films of Bi2Te3 and Related Materials: Applications in Thermoelectrics and Topological Insulators

“…A representative device is shown in Figure 3 m. The measured RT resistivity is comparable to the values reported for thick Bi 2 Te 3 films used in thermoelectric devices [15][16][17][18][19]. The resistivity of ~10 -5 m is considered to be optimal in conventional Bi 2 Te 3 films because its further reduction leads to decreasing Seebeck coefficient.…”

“…In general, the increase of the resistance with increasing temperature is more typical of metals rather than semiconductors. But it is rather common for Bi 2 Te 3 films and was observed for materials produced by a range of different techniques [15][16][17][18][19]. It is explained by the specifics of the electron scattering on acoustic phonons and defects in Bi 2 Te 3 [20] although few exceptions from this dependence were also reported [21].…”

Electronic structures and thermoelectric properties of La or Ce-doped Bi2Te3 alloys from first principles calculations

“…There were several approaches to improve the thermoelectric properties of Bi 2 Te 3 -based alloys, including synthesizing nanostructured alloys and tuning carrier concentration of materials [14][15][16][17][18]. Recently, Rare earth (RE) elements including La, Ce, Y, Er, and Sm were used to adjust the thermoelectric properties of Bi 2 Te 3 [19][20][21][22][23][24][25][26][27]. For example, experimental data showed that the absoulte value of S of n-type Bi 2 Te 3 was raised through La doping, but decreased through Ce doping [19,24].…”

Влияние температуры спекания на термоэлектрические свойства соединения Bi-=SUB=-1.9-=/SUB=-Gd-=SUB=-0.1-=/SUB=-Te-=SUB=-3-=/SUB=-

“…Как было недавно установлено [17][18][19][20][21][22][23][24][25], в качестве эффективных легирующих примесей могут быть использованы редкоземельные элементы (R = Lu, Ce, Sm, Er, La и др.). Очевидно, что помимо собственно легирования редкоземельными элементами термоэлектрические свойства легированных материалов также будут зависеть от многих других характеристик материала, таких как плотность, кристаллическая и зеренная структура, элементный состав и дефектная структура.…”