Highly improved thermoelectric performance of Nb-doped SrTiO3 due to significant suppression of phonon thermal conduction by synergetic effects of pores and metallic nanoparticles

Key properties of inorganic thermoelectric materials—tables (version 1)

“…By processing under reducing conditions a high PF, comparable with that of Bi 2 Te 3 can be achieved, but reducing thermal conductivity is much more of a challenge as nanostructuring is less effective than in many other materials. Doping on the cation A site, with La in place of ∼10% of the Sr has been popular and effective, which under reducing conditions leads to the formation of oxygen vacancies, which enhance electrical conductivity and reduce thermal conductivity [596][597][598][599][600][601][602][603][604][605][606][607][608][609][610][611][612]. On the cation B site, doping with higher valent Nb leads to metallic conduction and simultaneously increases S because the effective mass m * is increased; consequently, the PF σS 2 is enhanced, with values of ∼1500 µW m −1 K −2 at 1000 K recorded for SrTi 0.8 Nb 0.2 O 3 epitaxial films and a zT max of 0.37 [596].…”

“…By optimized doping of A and or B sites of STO, zT max values at high temperatures have remained stubbornly around 0.38 [597-599, 603, 604, 610]. There have been isolated reports of zT max values above 0.5 for STO-based materials [602,608,611], but an interesting development in recent years has been the enhancement of transport properties at lower temperatures through additions of carbon-based species. Lin et al [600] showed that incorporation of small amounts of graphene (<1 wt%) into STO enabled single crystal-like electronic transport behavior, with high electrical conductivity at temperatures of 373 K or less.…”

Thermoelectric Borides: Review and Future Perspectives

“…Commonly used families of thermoelectric materials with their peak zT values. [1) Bi 0.5 Sb 1.5 Te 3 , [ 3 ] 2) Ge 0.87 Pb 0.13 Te, [ 4 ] 3) Pb 0.953 Na 0.04 Ge 0.007 Te, [ 8 ] 4) Ba 0.08 La 0.05 Yb 0.08 Co 4 Sb 12 , [ 9 ] 5) Ce 0.14 Co 4 Sb 12 , [ 10 ] 6) Ce 0.45 Nd 0.45 Fe 3 CoSb 12, [ 11 ] 7) (Nb 06 Ta 0.4 ) 0.8 Ti 0.2 FeSb, [ 12 ] 8) ZrCoBi 0.65 Sb 0.15 Sn 0.20 [ 13 ] 9) Nb 0.83 CoSb, [ 14 ] 10) Yb 14 MnSb 11 , [ 15 ] 11) YbCd 2 Sb 2 , [ 16 ] 12) CaMg 2 Bi 2 , [ 16 ] 13) Ba 6.4 La 1.6 Cu 16 P 30 , [ 17 ] 14) Ba 8 Al 16 Ga 2 Si 26 P 2 , [ 18 ] 15) Ba 8 Ga 10 Al 6 Sn 30 , [ 19 ] 16) Ba 8 Ga 16 Ge 30 , [ 20 ] 17) RuIn 2.950 Zn 0.050 , [ 21 ] 18) FeGa 2.80 Ge 0.20 , [ 22 ] 19) RuIn 2.975 Zn 0.025 , [ 23 ] 20) Th 3 P 4 , [ 24 ] 21) Sr 0.9 La 0.1 Ti 0.9 Nb 0.1 O 3 , [ 25 ] 22) Sr 0.95 (Ti 0.8 Nb 0.2 ) 0.95 Ni 0.05 O 3 , [ 26 ] 23) Ca 2.5 Tb 0.5 Co 4 O 9 , [ 27 ] 24) Pb 0.93 Sb 0.05 S 0.5 Se 0.5 , [ 28 ] 25) Cu 1.85 Ag 0.15 Sn 0.9 In 0.1 Se 3 , [ 29 ] 26) Cu 1.94 Se 0.5 S 0.5 , [ 30 ] 27) Mg 1.98 Cr 0.02 (Si 0.3 Sn 0.7 ) 0.98 Bi 0.02 , [ 31 ] 28) Mg 2.08 Si 0.364 Sn 0.6 Sb 0.036 , [ 32 ] 29) Mg 2.16 (Si 0.4 Sn 0.6 ) 0.97 Bi 0.03 , [ 33 ] 30) B 4 C +25 mol% TiB 2 , [ 34 ] 31) SrB 6 , [ 35 ] 32) B 13 C 2 [ 36 ] ].…”

How Efficient are Thermoelectric Materials? – an Assessment of State-of-The-Art Individual and Segmented Thermoelectric Materials

“…A collection of high-performing TE materials exhibiting exceptionally high zT approaching three, have been identified in the medium to high-temperature range (400e900 K), including compounds like SnSe [15,16], skutterudites [17], clathrates [17,18], or half-heuslers [19e21]. Other TE materials like FeGa 3 -types [22,23] and oxides [24,25] also offer a competitive zT at high temperatures combined with elemental abundances.…”