Development of persistent luminescence phosphors utilizing light-induced electron transfer in Ce3+-doped garnet materials

2014 Fiscal Year Final Research Report

• Project/Area Number: 25810136
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Kyoto University
• Principal Investigator: UEDA Jumpei 京都大学, 地球環境学堂, 助教 (90633181)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 長残光蛍光体 / 蓄光材料 / 電子移動 / 希土類イオン / 熱ルミネッセンス / 電子トラップ

Outline of Final Research Achievements

Recently, white LEDs have started to be widely used as a indoor illumination due to the high luminous efficacy, high energy saving and so on. In general, white LEDs are composed of blue LEDs and yellow phosphors, so that the white LEDs do not include UV and violet light. Therefore, persistent phosphors used as emergency signs in indoor environment should be charged by blue light. In this study, we successfully developed new blue light chargeable persistent ceramic phosphor, which has a comparable persistent property compared with well known SrAl2O4:Eu-Dy persistent phosphors.

Free Research Field

無機材料化学