The effect of a multivalley energy band structure on the thermoelectric figure of merit
نویسندگان
چکیده
منابع مشابه
مطالعه تبلور و تاثیر آلاینده ها بر ترکیبات ترموالکتریکی نیمرسانا با فرمول 3(Bi0.25Sb0.75)2Te
The (Bi0.25 Sb0.75)2Te3 compound is a p-type thermoelectric semiconductor for application in thermoelectric cooling systems. To fabricate this single crystal, required elements, Bi, Sb and Te with 5N purity melted in quartz capsule at 10-6 torr pressure and rapidly quenched to room temperature. The sample crystallized by zone melting method with the rate of 8 mm per an hour at 700 oC and for...
متن کاملبررسی تغییر ساختـار بلورین (Bi2Te3)0.25 (Sb2Te3)0.75 با درصـد وزنـی Te افـزوده به وسیلـهی AFM, EBSD و XRDو ارتقای عدد شایستگی بلور
(Bi2Te3)0.25(Sb2Te3)0.75 solid solution is a p type thermoelectric compound with optimum efficiency among the (Bi2Te3)x (Sb2Te3)1-x compounds with variable x. Increment of Bi2Te3 segment in the Bi-Sb-Te system decrease in hole concentration, which result in carriers transport tuning, an increment of Seebeck coefficient and decrement of electrical and thermal conductivities. An excess of Telluri...
متن کاملNumerical Modeling of a Nanostructure Gas Sensor Based on Plasmonic Effect
In the present paper, a nanostructure plasmonic gas sensor based on ringresonator structure at the wavelength range of 0.6-0.9 μm is presented. The plasmonicmaterials/SiO2 with the advantage of high mobility and low loss is utilized as a substratefor structure to obtain some appropriate characteristics for the sensing Performanceparameters. To evaluate the proposed senso...
متن کاملAnisotropic Thermoelectric Response in Two-Dimensional Puckered Structures
Two-dimensional semiconductor materials with puckered structure offer a novel playground to implement nanoscale thermoelectric, electronic, and optoelectronic devices with improved functionality. Using a combination of approaches to compute the electronic and phonon band structures with Green’s function based transport techniques, we address the thermoelectric performance of phosphorene, arsene...
متن کاملElectronic thermal conductivity and thermoelectric figure of merit of n-type PbTeÕPb1ÀxEuxTe quantum wells
We have investigated the electronic thermal conductivity and thermoelectric figure of merit of ~100! and ~111! oriented PbTe/Pb12xEuxTe quantum wells. Our theoretical formalism includes the nonparabolicity of the carrier dispersion, band anisotropy, as well as carrier scattering on acoustic and optical phonons and presents a substantial improvement over existing models. The kinetic equations ar...
متن کامل