Thermoelectric properties of Co substituted synthetic tetrahedrite

Thermoelectric properties of n-type Cu4Sn7S16-based compounds

“…5(d)), which is close to the data of Sb 3+ -containing materials such as Sb 2 S 3 (BE: 529.6 eV for 3d 5/2 and 539 eV for 3d 3/2 ; DS: 9.4 eV), 27 CuSbS 2 (BE: 529.03 eV for 3d 5/2 and 538.43 eV for 3d 3/2 ; DS: 9.4 eV), 28 and Cu 12 Sb 4 S 13 (BE: 539.0 eV for 3d 3/2 ). 29 Therefore, the substitution of Sb 3+ for Sn 4+ is expected to generate extra holes.…”

Research Update: Cu–S based synthetic minerals as efficient thermoelectric materials at medium temperatures

“…For Tr = Ni, high ZT value at ∼700 K and good thermal stability up to 783 K were confirmed by other research groups, [49][50][51] whereas for Tr = Ni and Zn (co-doped), ZT = 1 has not been followed up so far. Good figures of merit have been demonstrated also for Tr = Mn, 37,52,53 and Tr = Co, 54,55 as well as samples made of mixed natural and synthetic tetrahedrites. 13,[56][57][58] It should be noted that the natural minerals showed rather low ZT's due to excessive ρ.…”

High-Performance Thermoelectric Bulk Colusite by Process Controlled Structural Disordering

“…14,17 In order to mitigate electro-migration, other metallic species besides copper have been added into the composition extending the exploration to complex ternary/quaternary Cu based sulfides. A non-exhaustive list includes p-type tetrahedrite Cu 12-x Tr x Sb 4 S 13 (ZT ~ 0.80 @ 700 K) [18][19][20][21][22][23][24][25][26][27][28][29][30][31] with Tr = Mn, Fe, Co, Ni, Zn (x ≤ 2), colusite Cu 26 V 2 Sn 6 S 32 (ZT ~ 0.60 @ 700 K), 32,33 germanite-derivative Cu 22 Fe 8 Ge 4 S 32 (ZT ~ 0.17 @ 575 K), 34 bornite Cu 5 FeS 4 (ZT ~ 0.55 @ 550 K), [35][36][37] stannoidite Cu 8.5 Fe 2.5 Sn 2 S 12 (ZT ~ 0.35 @ 630 K), 38 Cu 2 SnS 3 (ZT ~ 0.56 @ 750 K), 39 Cu 2 ZnSnS 4 (ZT ~ 0.35 @ 700 K) 40,41 , CuCr 2-x Sb x S 4 (ZT ~ 0.45 @ 650 K) 42 or n-type Cu 4 Sn 7 S 16 (ZT ~ 0.21 @ 700 K), 43 CuFeS 2 (ZT ~ 0.17 @ 630 K), 44,45 Cu 2 CoTi 3 S 8 (ZT ~ 0.18 @ 650 K) 46 and CuFe 2 S 3 (ZT ~ 0.14 @ 700 K). 47 Regardless the light atomic masses, most of these materials exhibit low thermal conductivity possibly determined by local structural distortions, rattling phenomena, or strong bond anharmonicity.…”