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Nanostructuring, carrier engineering and bond anharmonicity synergistically boost the thermoelectric performance of p-type AgSbSe2-ZnSe

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dc.contributor.author Guin, Satya N.
dc.contributor.author Negi, Devendra S.
dc.contributor.author Datta, Ranjan
dc.contributor.author Biswas, Kanishka
dc.date.accessioned 2017-02-21T08:58:12Z
dc.date.available 2017-02-21T08:58:12Z
dc.date.issued 2014
dc.identifier.citation Guin, SN; Negi, DS; Datta, R; Biswas, K, Nanostructuring, carrier engineering and bond anharmonicity synergistically boost the thermoelectric performance of p-type AgSbSe2-ZnSe. Journal of Materials Chemistry A 2014, 2 (12) 4324-4331, http://dx.doi.org/10.1039/c3ta14901c en_US
dc.identifier.citation Journal of Materials Chemistry A en_US
dc.identifier.citation 2 en_US
dc.identifier.citation 12 en_US
dc.identifier.issn 2050-7488
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2499
dc.description Restricted Access en_US
dc.description.abstract Thermoelectric "waste heat-to-electrical energy" generation is an efficient and attractive option for robust and environmentally friendly renewable energy production. Simultaneous tailoring of interdependent thermoelectric parameters, i.e. electrical conductivity, thermopower and thermal conductivity, to improve the thermoelectric figure of merit is the utmost challenge in this field. Another important aspect is to develop high performance materials based on cheap and earth abundant materials. We have chosen AgSbSe2, a homologue of AgSbTe2 containing earth abundant selenium, as a model system for thermoelectric investigation due to its low thermal conductivity and favourable valence band structure. Herein, we show that by integrating different but synergistic concepts: (a) carrier engineering, (b) second phase endotaxial nanostructuring and (c) bond anharmonicity, we can achieve a maximum ZT of similar to 1.1 at 635 K in AgSbSe2-ZnSe (2 mol%), which is significantly higher than that of pristine AgSbSe2. The above system therefore offers promise to replace traditional metal tellurides for mid-temperature power generation. We demonstrate a design strategy which provides simultaneous enhancement of electrical transport through optimized doping, superior thermopower by the convergence of degenerate valence bands, and glass-like thermal conductivity due to the effective scattering of phonons by nanostructuring, bond anharmonicity and a disordered cation sublattice. en_US
dc.description.uri 2050-7496 en_US
dc.description.uri http://dx.doi.org/10.1039/c3ta14901c en_US
dc.language.iso English en_US
dc.publisher Royal Society of Chemistry en_US
dc.rights @Royal Society of Chemistry, 2014 en_US
dc.subject Physical Chemistry en_US
dc.subject Energy & Fuels en_US
dc.subject Materials Science en_US
dc.subject Figure-Of-Merit en_US
dc.subject Bulk Thermoelectrics en_US
dc.subject Enhanced Figure en_US
dc.subject Agsbte2 en_US
dc.subject Agpbmsbte2+M en_US
dc.subject Disorder en_US
dc.subject Agbise2 en_US
dc.subject Pbte en_US
dc.title Nanostructuring, carrier engineering and bond anharmonicity synergistically boost the thermoelectric performance of p-type AgSbSe2-ZnSe en_US
dc.type Article en_US


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