| 简介 |
PROBLEM TO BE SOLVED : To provide a fluorescent substance sheet having a flexibility and usable under a high temperature environment, and a flexible light-emission element.
SOLUTION : The fluorescent substance sheet is provided, which is characterized in a structure that laminar silicate crystalline pieces activated by a rare earth ion are laminated. Further, the laminar silicate crystalline piece has an aligned plane orientation, and a crystalline structure of the laminar silicate crystalline piece is any one of a mica structure, a chlorite structure, a kaolinite structure or a smectite structure. Further, the rare earth ion is the one selected from the group consisting of divalent Eu, divalent Sm, trivalent Ce, trivalent Eu, trivalent Sm and trivalent Tb.
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