Journal ArticleDOI
Demonstration of electron filtering to increase the Seebeck coefficient in In 0.53 Ga 0.47 As ∕ In 0.53 Ga 0.28 Al 0.19 As superlattices
Joshua M. O. Zide,Daryoosh Vashaee,Zhixi Bian,Gehong Zeng,John E. Bowers,Ali Shakouri,Arthur C. Gossard +6 more
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In this paper, the authors explore electron filtering as a technique to increase the Seebeck coefficient and the thermoelectric power factor of heterostructured materials over that of the bulk.Abstract:
In this paper, we explore electron filtering as a technique to increase the Seebeck coefficient and the thermoelectric power factor of heterostructured materials over that of the bulk We present a theoretical model in which the Seebeck coefficient and the power factor can be increased in an ${\mathrm{In}}_{053}{\mathrm{Ga}}_{047}\mathrm{As}$-based composite material Experimental measurements of the cross-plane Seebeck coefficient are presented and confirm the importance of the electron filtering technique to decouple the electrical conductivity and Seebeck coefficient to increase the thermoelectric power factorread more
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Journal ArticleDOI
Conductive scanning probe microscopy of nanostructured Bi2Te3.
Tewfik Souier,Guang Li,Sergio Santos,Marco Stefancich,Marco Stefancich,Matteo Chiesa,Matteo Chiesa +6 more
TL;DR: The C-AFM data show that the electrical conductivity of nanosized grains is higher than the bulk value and reaches 1600 S cm(-1), which results in a moderate increment of the overall electrical Conductivity, thereby increasing the figure of merit (ZT) up to 1.4 at 100 °C.
Journal ArticleDOI
Effect of the energy dependence of the carrier scattering time on the thermoelectric power factor of quantum wells and nanowires
Jane E. Cornett,Oded Rabin +1 more
TL;DR: In this paper, different functional forms of the energy-dependent relaxation time τ(E) are incorporated in the model to account for carrier scattering mechanisms typical in semiconductor nanostructures.
Journal ArticleDOI
Influence of germanium nano-inclusions on the thermoelectric power factor of bulk bismuth telluride alloy
Nikhil Satyala,Armin Tahmasbi Rad,Zahra Zamanipour,Payam Norouzzadeh,Jerzy S. Krasinski,Lobat Tayebi,Daryoosh Vashaee +6 more
TL;DR: In this article, the influence of Ge nano-inclusions and long duration annealing on the thermoelectric properties of nanostructured Bi2Te3 was investigated.
Journal ArticleDOI
Implication of nanostructuring of bulk nanocomposite Ti9Ni7Sn8 on the optimization of high thermoelectric performance
Ashish Kumar,Ashish Kumar,Kalpana Chaturvedi,Ankit Bhardwaj,Ankit Bhardwaj,Bal Govind,Bal Govind,Sahiba Bano,Sahiba Bano,Dinesh K. Misra +9 more
TL;DR: In this article, the authors have extended this approach on bulk nanocomposite (BNC), containing HH and Full Heusler (FH) with little traces of Ti6Sn5 phase in a stoichiometric composition Ti9Ni7Sn8 for the optimization of high thermoelectric performance.
Thermoelectrical properties of Bi2Te3 Nanocomposites
V. A. Kulbachinskii,Vladimir G. Kytin,N. V. Maslov,P. Singha,Subarna Das,A. K. Deb,Arnab Banerjee +6 more
TL;DR: In this paper, the thermoelectrical figure of merit ZT in the temperature interval 80 K was obtained for Bi2Te3/graphite nanocomposite samples by mixing different weight percentage of graphite (x=0.0, 0.5 and 1.0), and then subsequently ball milled.