Colloidal synthesis and thermoelectric properties of La-doped SrTiO3 nanoparticles

On the formation of superoxide radicals on colloidal ATiO3 (A = Sr and Ba) nanocrystal surfaces

“…1 In addition to exhibiting prototypical quantum paraelectric behavior, 2 these semiconductors are also promising host lattices for visible-light photocatalytic H 2 O splitting and CO 2 reduction, 3-9 sensors, 10 and memristors. 11,12 Recent advances in the colloidal synthesis [13][14][15][16][17][18][19][20] of ternary metal oxide nanocrystals (NCs) including SrTiO 3 and BaTiO 3 has generated further interest in the emergent phenomena that arise in these technologically-relevant materials when prepared with nanometer dimensions.…”

First-Principles Modeling of SrTiO3Based Oxides for Thermoelectric Applications

“…0.40m e (0.39m e ), 6.09m e (6.1m e ), and 0.58m e (0.57m e ) where m l and m h are the light and heavy effective masses of the three fold degenerate Ti t 2g bands which form the CB bottom. The estimated m l , m h , and m * i values are within B1-WC(LDA), respectively.…”

“…Consequently, efforts have been devoted over the last 15 years to the optimization of TE properties of both n-type and p-type oxide materials. Good candidates for n-type materials include Nb-, W-, La-, Ce-, Pr-, Nd-, Sm-, Gd-, Dy-, and Ydoped SrTiO 3 [1][2][3][4][5][6][7][8][9][10][11][12][13], Nb-, La-, Nd-, Sm-, and Gd-doped Sr 2 TiO 4 , and Sr 3 Ti 2 O 7 [14], La-doped CaMnO 3 [15] or Al-, Ge-, Ni-and Co-doped ZnO [16][17][18][19][20], Ce-doped In 2 O 3 [21], Er-doped CdO [22,23], TiO 2 [24], Nb 2 O 5 [24], WO 3 [24], while for p-type materials the most promising compounds are Ca 3 Co 4 O 9 [25] with ZT ∼ 0.3 at 1000 K [26], and BiCuSeO with ZT ∼ 1.4 at 923 K. [27] Many studies have concerned doped SrTiO 3 , demonstrating the largest ZT ∼ 0.4 in SrTi 0.8 Nb 0.2 O 3 films at 1000 K [2], and ZT ∼ 0.41 in bulk Sr 1−3x/2 La x TiO 3 at 973 K. [12] Different strategies have been proposed to further increase TE efficiency. Attempts to decrease the lattice thermal conductivity κ l by atomic substitution of Sr by Ba have been envisaged but seem to negatively affect the TE performance.…”

Contribution of point defects and nano-grains to thermal transport behaviours of oxide-based thermoelectrics

“…(a) Temperature dependence of effective thermal conductivity for La-doped STO with 69 nm grain size60 and (b) the lattice thermal property of In 2 O 3 with different grain sizes, the inset graph is the function with reciprocal temperature.…”