Nitrogen-induced enhancement of luminescence of blue-emitting Sr_2MgSi_2O_7:Eu~(2+) phosphors for li

• 作 者: 刘艳花 王达健
• 机 构: School of Materials Science and Engineering, Tianjin University of Technology,Key Laboratory of Disp
• 出 处: Optoelectronics Letters
• 发表日期: 2010年01期
• 关键词: luminous coordinates ultraviolet luminescence desired purity symmetry excited ad

The near-ultraviolet (n-UV) excited blue-emitting Sr2MgSi2O7:Eu2+ phosphors are used for fluorescence lamp and tricolor white LEDs. The effect of nitrogen-doped on the structure of the host and the enhancement of photoluminescence is experimentally investigated. The results show that as the amount of nitrogen-doped varies from 0 to 0.6 (at.), the luminous intensity is found to be increased to 169%, and the partial replacement of O by N results in a change of the crystal field by modifying the symmetry of the crystal structure. As a result, with the nitrogen-doped in small amount, the luminous intensity, chromaticity coordinates and the color purity can be adjusted to a desired value in the applications.

The near-ultraviolet (n-UV) excited blue-emitting Sr2MgSi2O7: Eu2 + phosphors are used for fluorescence lamp and tricolor white LEDs. The effect of nitrogen-doped on the structure of the host and the enhancement of photoluminescence is experimentally investigated. show that as the amount of nitrogen-doped varies from 0 to 0.6 (at.), the luminous intensity is found to be increased to 169%, and the partial replacement of O by N results in a change of the crystal field by modifying the symmetry of the crystal structure. As a result, with the nitrogen-doped in small amount, the luminous intensity, chromaticity coordinates and the color purity can be adjusted to a desired value in the applications.