Electrical transport and thermoelectric properties of Ca_0.8Y_0.2−xDy_xMnO_3−δ (0 ≤ x ≤ 0.2)

Abstract

Ca 0.8 Y 0.2Àx Dy x MnO 3Àd (0≤x≤0.2) samples were fabricated by the solid-state reaction method, and their thermoelectric properties were studied from 500°C to 800°C. Upon the substitution of Dy 3+ for Y 3+ in the Ca 0.8 Y 0.2Àx Dy x MnO 3Àd , the electrical and thermal conductivities gradually decreased with increasing Dy 3+ concentration, whereas the absolute value of the Seebeck coefficient significantly increased. The Ca 0.8 Dy 0.2 MnO 3Àd showed the largest value of dimensionless figure of merit (0.180) at 800°C as a result of the combination of the largest absolute value of the Seebeck coefficient and the lowest thermal conductivity. We believe that the Ca 0.8 Dy 0.2 MnO 3Àd is a promising thermoelectric material at high temperatures.

Electrochemical Deposition and Thermoelectric Characterisation of a Semiconducting 2-D Metal-Organic Framework Thin Film

“…[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] (Table SI1) S2). [35][36][37] These values are comparable to other classes of thermoelectric materials such as nanostructured materials (Bi2S3 nanowires 38 ), metal oxides (Ca0.8Dy0.2MnO3 39 ) and conducting polymers (poly (3,4-ethylenedioxythiophene):polystyrenesulfonate/polypyrrole/paper 40 ).…”

Enhancement in the electrical transport properties of CaMnO3via La/Dy co-doping for improved thermoelectric performance

“…Co-doping at the Ca site can simultaneously decrease both resistivity and thermal conductivity and hence is considered to be more effective than single doping. 14,15 J. W. Seo et al 16 studied the electric and thermoelectric properties of Y, Dy co-doped CMO. Furthermore, the thermoelectric properties of La, Er, 17 La, Ce, 18 La, Sr 19 La, and Sm 20 co-doped CMO were investigated in detail for gaining superior thermoelectric properties.…”

A Study on the Effects of La/Sm Codoping on the Structural and High Temperature Thermoelectric Properties of n‐Type CaMnO3−δ Perovskite

“…[ 9,10 ] Trivalent doping:Y 3+ , Sm 3+ , [ 11 ] Gd 3+ , [ 12 ] Dy 3+ , La 3+ , Yb 3+ at the Ca site; pentavalent doping: Nb 5 + , V 5+ at the Mn site, hexavalent W 6+[ 13 ] doping at Mn site, and so on, were/are studied/ studying in order to enhance the electrical conductivity of CMO. Ca‐site co‐doping strategy with Dy/Yb, [ 14,15 ] Pr/Yb [ 16 ] Dy/Bi, [ 17 ] Dy/Y [ 18 ] were also tried for the improvement of thermoelectric properties of CMO. Furthermore, the substitution of alkali earth metals ‐ Na + , K + ‐ along with lanthanides in the Ca site were also studied elsewhere, [ 19,20 ] to maintain a good profile for the Seebeck coefficient and to reduce thermal conductivity due the defects generated.…”