TiO2 (Titanium dioxide) is a well-known material that is widely used in various applications, including optics, electronics, and biology. Anatase is one of the two main crystal structures of TiO2, the other being rutile. In the anatase form, TiO2 has a tetragonal crystal structure and a bandgap of around 3 eV, making it a wide bandgap material.
Anatase TiO2 is a promising substrate material for various optoelectronic applications, including solar cells, photodetectors, and light-emitting diodes. It has a high optical transparency and high thermal stability, making it suitable for high-temperature processing and device fabrication. Additionally, anatase TiO2 has a high surface area, which makes it useful for catalysis, gas sensing, and other applications.
The use of anatase TiO2 substrates in optoelectronic devices has been limited by its relatively low conductivity. However, this can be overcome by incorporating other materials, such as metal oxides, into the substrate to improve its electrical properties.