Energy Band Gap Lithium Tantalate (LiTaO3) Doping Niobium and Rubidium
Agus Ismangil, Fatimah Noor Arifiati, Toto Winata

Institut Teknologi Bandung

Abstract

This method has the advantage that the procedure is easy, the cost is relatively economical, and get good results. Chemical solution deposition (CSD) method is a method of making films by depositing chemical solutions on the surface of the substrate, then prepared with a spin coater at a speed of 3000 rpm for 30 seconds each drop of a LiTaO3 solution. The results show that the band gap energy LiTaO3 film shown in the picture 4 Pure LiTaO3 film, has band gap energy of 1 eV. Electrons are more easily excited than valence band to conduction band because the energy required is not too large. and Niobium-doped LiTaO3 film, having a band gap energy of 1.15 eV. Great energy is required for electrons to excited from valence band to conduction tape. Meanwhile, the rubidium doped LiTaO3 film has a band gap energy of 1.30 eV.

Keywords: band gap energy, lithium tantalate, niobium, rubidium

Topic: Materials Physics