SnSe pyroelectric material

Product Name

^{Name:a>SnSe pyroelectric material}

Product Overview

^{Thermoelectric materials are functional materials that can convert thermal and electrical energy by utilizing their internal charge carriers and phonons. The effective operation of thermoelectric materials is mainly based on three physical effects, namely the Seebeck Effect (discovered in 1794, referring to the phenomenon of thermal to electrical conversion between two different conductors), the Peltier Effect (discovered in 1834, the phenomenon of electrical to thermal conversion between two different conductors), and the Thomson Effect (discovered in 1851, the phenomenon of heat absorption and release in a single conductor).}

^{The conversion efficiency of thermoelectric materials is determined by the dimensionless parameter - thermoelectric figure of merit ZT, and its calculation formula is:}

^{ZT=σ S2T/k, where σ is the conductivity, S is the Seeback coefficient, which is the inherent electronic transport performance parameter of thermoelectric materials, T is the temperature, and k is the total thermal conductivity. A common method to improve the performance of thermoelectric materials is to introduce multi-scale second phases to regulate the microstructure of thermoelectric materials, thereby changing the band structure and crystal structure of the matrix to coordinate various parameters and optimize their thermoelectric transmission performance.}

^{Traditional inorganic thermoelectric materials are currently a type of thermoelectric material with a wide range of applications and a long research time. Mainly including Mg based thermoelectric materials (Mg2X (X=Si, Sn)), Bi2Te3 based thermoelectric materials, SiGe based thermoelectric materials, PbX (X=S, Se, Te) based thermoelectric materials, SnX (X=S, Se) based thermoelectric materials, GeTe based thermoelectric materials, and oxide based thermoelectric materials.}

^{SnSe is a semiconductor material commonly used in the field of optoelectronics. At room temperature, SnSe has two different lattice types, Pnma and Cmcm (phase transition occurs at approximately 800 K). The SnSe in Pnma phase has a layered structure with unit cell parameters of a=11.49 Å, b=4.44 Å, and c=4.135 Å, respectively. The layers are connected by Sn Se bonds, forming an accordion like shape that extends between the layers. The non harmonic bonds between Sn Se contribute to the intrinsic ultra-low thermal conductivity of SnSe, which greatly interferes with the transmission of atomic vibrations, resulting in extremely low thermal conductivity.}

^{Technical Parameter}

Appearance:Black powder

Thickness:~5μm

Main ingredient:Sn_0.985Gd_0.015Se

Semiconductor type: P type

^{Product Features}

^{1. Layered crystal structure: This unique structure facilitates phonon scattering, thereby reducing thermal conductivity.}

^{2. Good electrical performance: It has appropriate conductivity and can effectively transfer charges.}

^{3. Lower thermal conductivity: Factors such as layered structure and crystal defects significantly reduce thermal conductivity, which is beneficial for improving thermoelectric performance.}

^{Application Fields}

^{1. Industrial waste heat recovery: converting a large amount of waste heat generated during factory production into electrical energy to improve energy utilization efficiency.}

^{2. Solar thermal power generation: Combined with solar collectors, it efficiently converts the thermal energy generated by solar energy into electrical energy.}

^{3. Self powered sensors: Provide continuous power to remote or difficult to maintain sensors without the need for an external power source.}

^{Related Information}

^{Please e-mail for the detailed characterization data.}

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