Thermoelectric properties and nonstoichiometry of GaGeTe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F12%3A39895381" target="_blank" >RIV/00216275:25310/12:39895381 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389013:_____/12:00380725

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0022459612001958" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0022459612001958</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jssc.2012.03.030" target="_blank" >10.1016/j.jssc.2012.03.030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermoelectric properties and nonstoichiometry of GaGeTe

Popis výsledku v původním jazyce

Polycrystalline samples of composition Ga(1+x)Ge(1-x)Te (x from -0.03 to 0.07) and GaGeTe(1-y) (y from -0.02 to 0.02) were synthesized from elements of 5 N purity using a solid state reaction. The products of synthesis were identified by X-ray diffraction: phase purity and microstructure were examined by EDX/SEM. Samples for measurement of transport properties were prepared using hot-pressing. They were characterized by measurement of electrical conductivity, the Hall coefficient, and the Seebeck coefficient over a temperature range 80-480 K and of thermal conductivity over a temperature range 300-580 K. All samples show p-type conductivity. We discuss the influence of stoichiometry on the phase purity of the samples and on free carrier concentration.The investigation of thermoelectric properties shows that the power factor of these samples is low compared to state-of-the-art materials at room temperature but increases distinctly with temperature.

Název v anglickém jazyce

Thermoelectric properties and nonstoichiometry of GaGeTe

Popis výsledku anglicky

Polycrystalline samples of composition Ga(1+x)Ge(1-x)Te (x from -0.03 to 0.07) and GaGeTe(1-y) (y from -0.02 to 0.02) were synthesized from elements of 5 N purity using a solid state reaction. The products of synthesis were identified by X-ray diffraction: phase purity and microstructure were examined by EDX/SEM. Samples for measurement of transport properties were prepared using hot-pressing. They were characterized by measurement of electrical conductivity, the Hall coefficient, and the Seebeck coefficient over a temperature range 80-480 K and of thermal conductivity over a temperature range 300-580 K. All samples show p-type conductivity. We discuss the influence of stoichiometry on the phase purity of the samples and on free carrier concentration.The investigation of thermoelectric properties shows that the power factor of these samples is low compared to state-of-the-art materials at room temperature but increases distinctly with temperature.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

—

Svazek periodika

193

Číslo periodika v rámci svazku

SI

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

42-46

Kód UT WoS článku

000308047800009

EID výsledku v databázi Scopus

—