Enhanced atomic ordering leads to high thermoelectric performance in AgSbTe2

Roychowdhury，Subhajit1; Ghosh，Tanmoy1; Arora，Raagya2; Samanta，Manisha1; Xie，Lin3; Singh，Niraj Kumar4; Soni，Ajay4; He，Jiaqing3; Waghmare，Umesh V.2,5,6; Biswas，Kanishka1,5,6

2021-02-12

10.1126/science.abb3517

SCIENCE   Impact Factor & Quartile

0036-8075

1095-9203

High thermoelectric performance is generally achieved through either electronic structure modulations or phonon scattering enhancements, which often counteract each other. A leap in performance requires innovative strategies that simultaneously optimize electronic and phonon transports. We demonstrate high thermoelectric performance with a near room-temperature figure of merit, ZT ~ 1.5, and a maximum ZT ~ 2.6 at 573 kelvin, by optimizing atomic disorder in cadmium-doped polycrystalline silver antimony telluride (AgSbTe). Cadmium doping in AgSbTe enhances cationic ordering, which simultaneously improves electronic properties by tuning disorder-induced localization of electronic states and reduces lattice thermal conductivity through spontaneous formation of nanoscale (~2 to 4 nanometers) superstructures and coupling of soft vibrations localized within ~1 nanometer around cadmium sites with local strain modulation. The strategy is applicable to most other thermoelectric materials that exhibit inherent atomic disorder.

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Swarnajayanti Fellowship, Science and Engineering Research Board (SERB)[SB/SJF/2019-20/06] ; Department of Science and Technology (DST), India[DST/SJF/CSA-02/2018-19] ; National Natural Science Foundation of China[11934007] ; Science and Technology Innovation Committee Foundation of Shenzhen[KQTD2016022619565991]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000617551600046

AMER ASSOC ADVANCEMENT SCIENCE

BIOLOGY & BIOCHEMISTRY;CLINICAL MEDICINE;MULTIDISCIPLINARY;PLANT & ANIMAL SCIENCE;ENVIRONMENT/ECOLOGY;SOCIAL SCIENCES, GENERAL;MICROBIOLOGY;ECONOMICS BUSINESS;IMMUNOLOGY;MATERIALS SCIENCE;MATHEMATICS;COMPUTER SCIENCE;SPACE SCIENCE;MOLECULAR BIOLOGY & GENETICS;CHEMISTRY;PSYCHIATRY/PSYCHOLOGY;NEUROSCIENCE & BEHAVIOR;PHYSICS;GEOSCIENCES;ENGINEERING

2-s2.0-85101308388

Scopus

1.New Chemistry Unit,Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR),Bangalore,Jakkur P.O.,560064,India
2.Theoretical Sciences Unit,JNCASR,Bangalore,Jakkur P.O.,560064,India
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.School of Basic Science,Indian Institute of Technology Mandi,Mandi, Himachal Pradesh,175075,India
5.School of Advanced Materials,JNCASR,Bangalore,Jakkur P.O.,560064,India
6.International Centre for Materials Science,JNCASR,Bangalore,Jakkur P.O.,560064,India

Roychowdhury，Subhajit,Ghosh，Tanmoy,Arora，Raagya,et al. Enhanced atomic ordering leads to high thermoelectric performance in AgSbTe2[J]. SCIENCE,2021,371(6530):722-727.

Roychowdhury，Subhajit.,Ghosh，Tanmoy.,Arora，Raagya.,Samanta，Manisha.,Xie，Lin.,...&Biswas，Kanishka.(2021).Enhanced atomic ordering leads to high thermoelectric performance in AgSbTe2.SCIENCE,371(6530),722-727.

Roychowdhury，Subhajit,et al."Enhanced atomic ordering leads to high thermoelectric performance in AgSbTe2".SCIENCE 371.6530(2021):722-727.