Novel SrGa[sub 2]O[sub 4] Phosphor for Tunable Blue-White Luminescence

A tunable blue to blue-white phosphor was prepared with a solid-state reaction method by varying the composition concentration of source materials. The decomposition temperature and weight loss of and were evaluated by thermogravimetric analysis. The deficiency of Ga in phosphor can be compensated by increasing the molar ratio of Photoluminescence measurements show that Ga is the luminescence center of strontium gallate phosphor. When the molar ratio of is 1, the emission wavelength of phosphor is ∼402 nm, which is referred to the transition of electrons in Ga d orbits. Crystallization of was observed as the phosphor was prepared at a higher molar ratio of The ligand field and the electron transferring mechanism in Ga will be modulated by the development of Thus, the emission wavelength of phosphor is altered from 402 to 430 nm where the electron is transferred from exciting state to ground state while the emission spectrum is broadened. © 2004 The Electrochemical Society. All rights reserved.