Structural and electronic evolution in the Cu₃SbS₄–Cu₃SnS₄solid solution

Abstract

Cu3Sb1-xSnxS4 samples with 0.0 ≤ x ≤ 1.0 were synthesized from pure elements by mechanical alloying combined with spark plasma sintering. The structural and electronic properties of these compounds were...

Local-Disorder-Induced Low Thermal Conductivity in Degenerate Semiconductor Cu22Sn10S32

“…With the aim to decrease the hole concentration while retaining the semi-ordering character of this phase beneficial for suppressing the heat transport, we have investigated the aliovalent substitution of Sb 5+ for Sn 4+ , as reported recently in Cu2SnS3 and Cu3SnS4. 8,57,58 We have fixed the pristine composition to the one determined from synchrotron X-ray diffraction data, i. Cu26V2Ge6-xSbxS32. 56 As anticipated, the substitution of Sb for Sn in Cu22Sn10S32 results in a significant decrease in the hole concentration, reflected by the simultaneous increase in r and S.…”

“…They are mainly p-type conductors formed with non-toxic, ecofriendly, and Earth abundant elements. [1][2][3] Several CTS with chemical formula Cu2+xSn1-xS3 have been synthesized to date and have been shown to exhibit attractive electronic and thermal properties: Cu2SnS3 (x = 0), 1,4 Cu7Sn3S10 (x ~ 0.10), 5 Cu5Sn2S7 (x ~ 0.15), 6 Cu3SnS4 (x = 0.25) 7,8 .…”

Thermoelectric Cu–S-Based Materials Synthesized via a Scalable Mechanochemical Process

“…Also, completely replacing Zn with Cu in Cu 2 ZnSnS 4 will form Cu 3 SnS 4 , which has a disordered tetragonal structure with very low electrical resistivity. 113 It seems that nonstoichiometric compositions of Cu 2+x Zn 1−x SnS 4 are key to achieving an improvement of thermoelectric performance. 107,112 Guided by the previously published work on kesterites, we selected several samples of industrially synthesized kesterites of which the photovoltaic properties have been reported 69 to perform thermoelectric measurements.…”

“…Among them, the mechanochemical synthesis starting from Cu, Zn, Sn, and S elemental precursors demonstrates a scalable approach toward the pure CZTS nanocrystals. ,, The influence of changing Cu:Zn ratio in Cu 2 ZnSnS 4 leads to Cu/Zn disorder with consequences on its physical properties. − From a thermoelectric point, this effect was analyzed in ref . Also, completely replacing Zn with Cu in Cu 2 ZnSnS 4 will form Cu 3 SnS 4 , which has a disordered tetragonal structure with very low electrical resistivity . It seems that nonstoichiometric compositions of Cu 2+ x Zn 1– x SnS 4 are key to achieving an improvement of thermoelectric performance. , …”

“…From a thermoelectric point this effect was analysed by 11 . Also, completely replacing Zn with Cu in Cu 2 ZnSnS 4 will form Cu 3 SnS 4 , which has a disordered tetragonal structure with very low electrical resitivity 110 . It seems that non-stoichiometric compositions of Cu 2+x Zn 1-x SnS 4 is key to achieving an improvement of thermoelectric performance 104,109 .…”