Quantum Effects in the Thermoelectric Power Factor of Low-Dimensional Semiconductors

Nguyen T. Hung, Eddwi H. Hasdeo, Ahmad R.T. Nugraha, Mildred S. Dresselhaus, Riichiro Saito

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

We theoretically investigate the interplay between the confinement length L and the thermal de Broglie wavelength Λ to optimize the thermoelectric power factor of semiconducting materials. An analytical formula for the power factor is derived based on the one-band model assuming nondegenerate semiconductors to describe quantum effects on the power factor of the low-dimensional semiconductors. The power factor is enhanced for one- and two-dimensional semiconductors when L is smaller than Λ of the semiconductors. In this case, the low-dimensional semiconductors having L smaller than their Λ will give a better thermoelectric performance compared to their bulk counterpart. On the other hand, when L is larger than Λ, bulk semiconductors may give a higher power factor compared to the lower dimensional ones.

Original languageEnglish
Article number036602
JournalPhysical Review Letters
Volume117
Issue number3
DOIs
Publication statusPublished - 2016 Jul 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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