The size and phase of bismuth telluride nanocrystals were tailored using a sintering process, to enhance their thermoelectric properties.

Rajan Babu D

Department of Physics

School of Advanced Sciences

Vellore Campus

Anandan P

Omprakash M

Azhagurajan M

Arivanandhan M

Koyama T

Hayakawa Y.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

CrystEngComm

Bismuth telluride based alloys are electronic semiconductors, which exhibit n- or p-type conduction due to the formation of Te vacancies or antisite defects, i.e., substitution of Bi on Te site or vice versa. Here, it is demonstrated that the temperature dependent Seebeck coefficient of Bi2Te2.7Se0.3 exhibits a reversible change in conduction from p- to n-type at temperatures &gt;487 K without exhibiting any structural transformation. The detailed characterization revealed that conversion of BiTe/Se antisite defects into Te vacancies is responsible for the p–n transition. The observed p–n transition makes Bi2Te2.7Se0.3 an ideal candidate for temperature controlled electronic switches. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Temperature Driven Unusual Reversible p- to n-Type Conduction Switching in Bi2Te2.7Se0.3

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Tailoring bismuth telluride nanostructures using a scalable sintering process and their thermoelectric properties

Journal	Data powered by TypesetCrystEngComm
Publisher	Data powered by TypesetRoyal Society of Chemistry (RSC)
ISSN	14668033
Open Access	0