Bismuth Telluride (Bi₂Te₃) Sputtering Targets
Purity: 99.999% Size: 2” Thickness: 0.125”
Sputtering is a well-established technology for depositing thin films from various materials onto substrates of different shapes and sizes. The process is highly repeatable and scalable, suitable for small research projects as well as medium-to-large production batches. Chemical reactions may occur on the target surface, in-flight, or on the substrate depending on the process parameters, giving experts fine control over film growth and microstructure.
Applications of Sputtering Targets
-
Thin Film Deposition: Material is eroded from a target and deposited onto substrates such as silicon wafers.
-
Semiconductor Etching: Sputter etching provides high anisotropy when selectivity is not critical.
-
Analytical Techniques: Secondary ion mass spectrometry (SIMS) uses sputtering to analyze target composition and detect trace impurities.
-
Space Applications: Sputtering contributes to space weathering, altering the physical and chemical properties of airless bodies like asteroids and the Moon.
Bismuth Telluride in Thin Films
Bismuth telluride (Bi₂Te₃) is a gray semiconductor compound of bismuth and tellurium. Alloyed with antimony or selenium, it becomes an efficient thermoelectric material for refrigeration or portable power generation. Bi₂Te₃ also acts as a topological insulator, exhibiting thickness-dependent physical properties.
-
Thermoelectric Devices: Widely used in bulk thermoelectric devices operating near ambient temperature.
-
Thin Film Applications: Nanostructured Bi₂Te₃ thin films enable chip-scale micro-coolers and flexible micro-power generators.
-
Enhanced Efficiency: Advances in nanotechnology and well-ordered thin film structures significantly improve thermoelectric performance compared to bulk materials.
-
Research Considerations: Composition, microstructure, morphology, thickness, stress-strain, and substrate conditions strongly influence thin film thermoelectric properties.
