Polycrystalline Snse
Polycrystalline Snse - Related Videos
09:23
Solution-Processed, Surface-Engineered, Polycrystalline CdSe-SnSe Exhibiting Low Thermal Conductivity
0 Views •
Cited by 2 •
2024
CdSe-SnSe nanocomposites are produced by consolidating surface-engineered SnSe particles. A simple aqueous synthesis is employed to produce SnSe particles. Coating SnSe particles with CdSe molecular complexes allows for controlling grain size and increasing the number of defects present in the nanocomposite, thus lowering the thermal conductivity.
09:32
Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping
0 Views •
Cited by 9 •
2012
Polycrystalline silicon thin-film solar cells on glass are fabricated by deposition of boron and phosphorous doped silicon layers followed by crystallisation, defect passivation and metallisation. Plasmonic light-trapping is introduced by forming Ag nanoparticles on the silicon cell surface capped with a diffused reflector resulting in ~45% photocurrent enhancement.
11:21
Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes
0 Views •
Cited by 3 •
2018
A protocol is presented demonstrating a two-step fabrication technique to grow large-sized single-layer rectangular shaped SnSe flakes on low-cost SiO2/Si dielectrics wafers in an atmospheric pressure quartz tube furnace system.
07:46
Optical Materialography Part 2: Image Analysis
0 Views •
2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA The imaging of microscopic structures of solid materials, and the analysis of the structural components imaged, is known as materialography. Often, we would like to quantify the internal three-dimensional microstructure of a material using only the structural features evidenced by an exposed two-dimensional surface. While X-ray based tomographical methods can reveal buried...
10:52
Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
0 Views •
Cited by 7 •
2015
This report describes the use of a custom-built system to perform aerosol deposition of thick films of yttrium iron garnet onto sapphire substrates at RT. The deposited films are characterized using scanning electron microscopy, profilometry, and ferromagnetic resonance to give a representative overview of the capabilities of the technique.
FAQs
Grain boundaries interrupt the continuous crystal structure and introduce interfaces between differently oriented grains. These interfaces can scatter charge carriers and lattice vibrations, changing both electrical conductivity and heat flow. Their influence connects nanoscale structural disorder with macroscopic transport behavior, so examining boundary density and grain arrangement helps explain why samples with different microstructures can show different thermoelectric performance.
Deviations from the intended tin-to-selenium ratio and other crystal defects modify the semiconducting lattice. They can affect how charge carriers move and how lattice vibrations transport heat, although the outcome depends on the resulting structure and defect distribution. Controlling composition therefore provides a way to investigate structure-property relationships and potentially improve the material’s transport behavior.
Grain size changes the number and relative importance of grain boundaries within the material. Smaller or differently distributed grains can alter the extent to which interfaces scatter charge carriers and lattice vibrations. Studying grain size alongside composition and processing conditions helps separate the effects of nanoscale disorder and clarifies how microscopic structure contributes to electrical and thermal behavior.
Composition, grain size, and processing conditions are the central variables identified for controlling this material. Researchers can relate changes in these factors to conductivity and heat flow, then evaluate how structural disorder affects the measured properties. This approach supports systematic comparisons among samples and helps identify conditions associated with improved thermoelectric performance.
An improvement is assessed by connecting the controlled structural change with its effects on electronic and thermal transport. Researchers can compare samples that differ in composition, grain size, or processing conditions and determine whether conductivity or heat flow changes in a favorable direction. This comparison reveals whether nanoscale disorder is contributing to or limiting thermoelectric behavior.
Thermoelectric devices convert temperature gradients into electrical power, making electrical conductivity and heat transport central performance considerations. Polycrystalline SnSe provides a chemistry and materials-research system for studying how bonding, grain boundaries, defects, and composition influence those properties. Understanding these relationships can guide efforts to control processing and improve the material’s suitability for thermoelectric applications.