Enhancing the thermoelectric power factor by using invisible dopants.
نویسندگان
چکیده
Nanoparticle dopants that are invisible to conduction electrons and have sharp dips in their electron scattering rate versus electron energy close to the Fermi level. Replacement of such dopants with traditional impurities results in simultaneous enhancement of the Seebeck coefficient and the electron mobility and therefore a large enhancement in the thermoelectric power factor can be achieved.
منابع مشابه
Quantitative determination of contributions to the thermoelectric power factor in Si nanostructures.
We report thermoelectric measurements on a silicon nanoribbon in which an integrated gate provides strong carrier confinement and enables tunability of the carrier density over a wide range. We find a significantly enhanced thermoelectric power factor that can be understood by considering its behavior as a function of carrier density. We identify the underlying mechanisms for the power factor i...
متن کاملمطالعه 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 کاملرشد بلور (Bi2Te3)0.96(Bi2Se3)0.04 به روش رشد ناحیهای و بررسی تغییرات شیمیایی ترکیب در راستای رشد
The (Bi2Te3)0.96(Bi2Se3)0.04 is an n-type thermoelectric semiconductor for using in thermoelectric cooling systems. Single crystal of this composition was grown by Zone Melting Method and thermoelectric power (α 2 σ) along the crystal growth where α is the Seebeck coefficient and σ is the electrical conductivity was measured. In this measurement a gradient along length of the prepared crystalli...
متن کاملThe Effect of Aperture Size on the Cavity Performance of Solar Thermoelectric Generator
In this manuscript, a solar cavity packed with thermoelectric generator modules is investigated numerically. The hot plate of TEG modules make the inner surface of the cube, and the cold plate is outside of the cavity, under natural convection. The TEG modules are electrically in series. The solution algorithm using the equations of heat transfer and generated power of TEG modules is d...
متن کاملEnhanced thermoelectric figure of merit in thin GaAs nanowires.
Combining density functional theory and the nonequilibrium Green's function method, we investigate the thermoelectric properties of thin GaAs nanowires (NWs). After identifying the most stable structures for GaAs NWs, either in wurtzite (wz) or zinc blende (zb) stacking, we present a systematic analysis on the thermoelectric properties of these NWs and their dependence on stacking type (wz or z...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Advanced materials
دوره 25 11 شماره
صفحات -
تاریخ انتشار 2013