Bismuth Telluride (Bi2Te3) Sputtering Targets content reformatted into a structured table while preserving all information, numbers, and units:
| Section | Details |
|---|---|
| Product Name | Bismuth Telluride (Bi2Te3) Sputtering Targets |
| Purity | 99.999% |
| Size | 2” |
| Thickness | 0.250” |
| Process Overview | Sputtering is a proven technology capable of depositing thin films from a wide variety of materials onto diverse substrate shapes and sizes. The process with sputter targets is repeatable and can be scaled up from small research and development projects. Targets can be adapted to production batches involving medium to large substrate areas. The chemical reaction can occur on the target surface, in-flight, or on the substrate depending on the process parameters. The many parameters make sputter deposition a complex process but allow experts a large degree of control over the growth and microstructure of the area. |
| Applications of Sputtering Targets | Sputtering targets are used for film deposition. The deposition made by sputter targets is a method of depositing thin films by sputtering that involves eroding material from a “target” source onto a “substrate” such as a silicon wafer. Semiconductor sputtering targets are used to etch the target. Sputter etching is chosen in cases where a high degree of etching anisotropy is needed and selectivity is not a concern. Sputter targets are also used for analysis by etching away the target material. One example occurs in secondary ion spectroscopy (SIMS), where the target sample is sputtered at a constant rate. As the target is sputtered, the concentration and identity of sputtered atoms are measured using mass spectrometry. By the help of the sputtering target, the composition of the target material can be determined and even extremely low concentrations of impurities are detected. Sputtering targets also have applications in space. Sputtering is one of the forms of space weathering, a process that changes the physical and chemical properties of airless bodies, such as asteroids and the Moon. |
| Material Description | Bismuth telluride with the chemical formula Bi2Te3 is a gray powder that is a compound of bismuth and tellurium. It is a semiconductor, which, when alloyed with antimony or selenium, is an efficient thermoelectric material for refrigeration or portable power generation. Bi2Te3 is a topological insulator, and thus exhibits thickness-dependent physical properties. |
| Thermoelectric Performance | Bismuth telluride-based alloys are the most widely used semiconductor materials in bulk thermoelectric (TE) devices working around ambient temperature. Very recently, nanostructured bismuth telluride-based thin films have attracted particular interest across scientific and engineering disciplines because they enable promising applications such as chip-scale micro-coolers for thermal management of high-powered micro/nano-electronics and flexible micro-power generators for energy harvesting. Due to tremendous progress in nanoscience and nanotechnology in recent years, the thermoelectric performance of bismuth telluride-based alloys has been significantly enhanced, especially in thin film materials with well-ordered structures, which promote much higher thermoelectric efficiency than that of the bulk counterpart. Similarly, the numerous influences of compositions, microstructures, morphologies, thickness, stress/strain, and substrate conditions on the thermoelectric properties of bismuth telluride-based thin films are intensively reported in the literature. |
