Bismuth Telluride (Bi₂Te₃) Sputtering Targets
Purity: 99.999% Size: 8” Thickness: 0.250”
Sputtering is a versatile technique for depositing thin films from a wide range of materials onto various substrate shapes and sizes. The process is highly repeatable and scalable, suitable for small research and development projects as well as medium-to-large production batches. Depending on process parameters, chemical reactions can occur on the target surface, in-flight, or on the substrate. Although sputter deposition involves multiple variables, it allows precise 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 is used when high anisotropy is required and selectivity is not a concern.
-
Analytical Techniques: Secondary ion mass spectrometry (SIMS) measures the composition of sputtered atoms, detecting even trace impurities.
-
Space Applications: Sputtering contributes to space weathering, modifying 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. When alloyed with antimony or selenium, it becomes an efficient thermoelectric material used in refrigeration and portable power generation. Bi₂Te₃ is also a topological insulator, exhibiting thickness-dependent physical properties.
-
Thermoelectric Devices: Bi₂Te₃-based alloys are widely used in bulk thermoelectric devices operating near ambient temperature.
-
Thin Film Applications: Nanostructured Bi₂Te₃ thin films are of high interest for chip-scale micro-coolers for thermal management of micro/nano-electronics and flexible micro-power generators for energy harvesting.
-
Enhanced Performance: Advances in nanoscience and nanotechnology have improved thermoelectric efficiency in thin films with well-ordered structures, surpassing bulk material performance.
-
Research Considerations: Composition, microstructure, morphology, thickness, stress-strain, and substrate conditions significantly influence the thermoelectric properties of Bi₂Te₃ thin films.
