10 June 1999 Influence of branch resistivity and transitional contact resistance on the thermoelectrical properties of thermoelements
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Proceedings Volume 3819, International Conference on Photoelectronics and Night Vision Devices; (1999) https://doi.org/10.1117/12.350908
Event: International Conference on Photoelectronics and Night Vision Devices, 1998, Moscow, Russian Federation
Abstract
The dependence of thermoelectrical efficiency Z of thermoelements based on Bi0.5Sb1.5Te3 and Bi2Te2.7Se0.3 on the branches materials resistivity p at different values or resistance or transitional contacts r and branches length 1; on branches length 1 at different p and r; and on transitional contacts resistance r at different p and 1 of branches have been studied. It has been found, that for given commutation alloy the length lk, after which the strong reduction of (Delta) Tmax had been observed with decreasing branches length, does not depend on branches resistivity. Although, at the transition from alloy with small contact resistance to the large ones, lk is shifted to large branch lengths. It can be explained by the fact that for the same alloy r itself depends on crystals p; the majority charge carriers concentration in crystal is decreased with increasing p, that leads to the increase of crystal-contact alloy junction resistance. It has been found that r of contacts is directly proportional to branches p. Therefore, the ratio r/p remains r is changed under the transition from one alloy to the other, and it leads to the shifting of lk value.
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T. D. Alieva, T. D. Alieva, N. M. Akhundova, N. M. Akhundova, D. Sh. Abdinov, D. Sh. Abdinov, } "Influence of branch resistivity and transitional contact resistance on the thermoelectrical properties of thermoelements", Proc. SPIE 3819, International Conference on Photoelectronics and Night Vision Devices, (10 June 1999); doi: 10.1117/12.350908; https://doi.org/10.1117/12.350908
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