Thermoelectric performance of Cu_1−x−δAg_xInTe₂ diamond-like materials with a pseudocubic crystal structure

Abstract

Polycrystalline samples of the title thermoelectric solid solution of title (x = 0—0.5, δ = 0.02—0.05) are prepared by melting and annealing stoichiometric amounts of the elements (graphite crucible in evacuated silica tubes, 1.

Synergistic Regulation of Phonon and Electronic Properties to Improve the Thermoelectric Performance of Chalcogenide CuIn1−xGaxTe2:yInTe (x = 0–0.3) with In Situ Formed Nanoscale Phase InTe

“…Generally, the α value increases with increase in Ga content (x value), and it converges gradually above ≈680 K at x ≤ 0.2. 2020, 6,1901141 reported (3.82-11.7 µW cm −1 K −2 ) [2,10,30,[33][34][35][36][39][40][41][42] and comparable to those of Cu 0.95(6) InTe 2 (13.0-13.7 µW cm −1 K −2 ) [1,9] and Cu 0.95(6) InTe 2 + In 2 O 3 (14.45µW cm −1 K −2 ). The electrical conductivity (σ) increases as the x value increases before it starts to fall at x > 0.2, and at x = 0.3 the electrical conductivity decreases significantly, as shown in Figure 2b.…”

Copper chalcogenide thermoelectric materials

“…3a, Cu 2 Se possesses two sublattices: the rigid FCC framework of Se atoms and the disordered and flowing sublattice of Cu. At high temperatures, Cu ions migrate from one site (interstitial one formed by Se) to another, exhibiting a flowing character that is Figure 1 Timeline of zT for selected Cu-based superionic conductors [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] (red), tetragonal [28][29][30][31][32][33][34][35][36][37] (blue) and distorted [38][39][40][41][42][43][44][45][46][47][48][49] (green) diamond-like materials and BiCuSeO oxyselenides (purple) [50][51][52][53][54][55][56][57][58][59]…”

Realizing high thermoelectric performance in Cu2Te alloyed Cu1.15In2.29Te4

“…5b, assuming that the Pisarenko relation 48 with the SPB model is valid in Cu-In-Te systems. 49,50 This dependence indicates that a values of samples alloyed with Cu 2 Te (by a dotted circle) are higher than those predicted by the Pisarenko relation at the corresponding carrier concentrations. The solid line depicted in Fig.…”