Single-crystalline Bi2Te3 nanosheets with uniform morphology via a simple, efficient, and high-yield microwave-assisted synthesis

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi0.5Sb1.5Te3 by a hydrothermal synthesis method

“…3a, which should relate to the anisotropic crystal structure of Bi 0.5 Sb 1.5 Te 3 . The Bi 2 Te 3 compound has a rhombohedra structure 32 with the space group R 3m, wherein along the c-axis, the atomic layers array in the order of -Te(1)-Bi-Te(2)-Bi-Te(1)-and the neighboring Te(1) layers are linked by weak van der Waals bonds. [34][35][36][37] Therefore, the morphology of Bi 2 Te 3 -based alloy normally exhibits the feature of hexagonal platelets.…”

“…17,[28][29][30][31] Instead, hydrothermal synthesis as an effective method to fabricate Bi 2 Te 3 -based materials takes much shorter time, 32,33 while the synthesis of a single-phase Bi 0.5 Sb 1.5 Te 3 solid solution by hydrothermal reaction is rarely reported. 18,34,35 Furthermore, the reported room-temperature thermoelectric properties of the Bi 2 Te 3 -based alloy synthesized by the hydrothermal method are not as good as expected.…”

Formation of randomly distributed nano-tubes, -rods and -plates of n-type and p-type bismuth telluride via molecular legation

“…5 in ethylene glycol with the help of glacial acetic acid at room temperature. For one millimole batch of Bi 0.5 Sb 1.5 Te 3 , 0.243 g of Bi(NO 3 ) 3 .5H 2 O, 0.342 g of SbCl 3 and 0.665 g of NaTeO 3 and for one millimole batch of Bi 2 Te 2.7 Se 0.3 , 0.970 g of Bi(NO 3 ) 3 .5H 2 O, 0.333 g of SeO 2 and 0.598 g of NaTeO 3 were sequentially dissolved/suspended in 20-25 mL ethylene glycol.…”

“…Recently, synthesis of bismuth telluride based thermoelectric nanomaterials in different morphology has attracted lot of interest [1][2][3][4][5][6][7][8][9][10][11][12]. This interest is driven by the performance enhancement of the thermoelectric nanomaterials in diverse morphology at nanoscale [4,13].…”

“…The performance of the thermoelectric materials is measured in terms of a dimensionless parameter, called figure of merit ZT, which is defined as; ZT = (S 2 /k)T, where S is Seebeck coefficient, is electric conductivity, k is thermal conductivity and T is absolute temperature. Templating molecules and organic legands are mostly used in the solvo-thermal processes to obtain different morphology [2][3][4][5][6][7][8] and there are few reports on synthesis of different morphology without use of temperating molecules and organic legands [9,10]. In addition, these processes have been applied mostly to binary bismuth telluride [2][3][4][5][6][7][8][9][10].…”