Transparent long lasting and photo-stimulating materiaals

透明、持久、光刺激材料

• 批准号: 11555234
• 负责人: HOSONO Hideo
• 金额: $ 8.83万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555234/
• 关键词: optical materials; long lasting luminescence; luminescence; defects; glass; 蓄光材料; カルシウムアルミネートガラス

Long lasting luminescence(LLL)and photostimulated luminescence(PSL)were found in reduced calcium aluminate glasses activated with Tb3+ ions. The LLL from Tb3+ was observed by illuminating the Tb3+4f-5d charge transfer band with uv light, while the PSL was seen by stimulating the glasses after uv-illumination with 633nm light. The decay curve of the LLL was fitted with a second order kinetics for the initial period and a first order for the latter. An electron spin resonance signal which is attributed to an F+-like center associated with Ca^<2+> ions was induced by illumination with uv-light and its intensity decay was fitted with the latter component of the LLL.The appearance of the PSL by illumination with 633nm light distinct reduced the ESR signal intensity. The thermoluminescent spectra of the specimen illuminated at 77K were composed of two components peaking at 〜240K and 〜380K.The low temperature peak and the high temperature peak were attributed to an F-center(two electrons trapped at the site of an oxygen vacancy)and an F+-center(an electron trapped at the site of an oxygen vacancy), respectively. It was concluded from the above results that electrons of the F-center and the F+-center contribute predominantly to the emergence of the LLL and the PSL, respectively.

在用Tb3+离子活化的还原铝酸钙玻璃中发现了长余辉发光(LLL)和光激励发光(PSL)。用紫外光照射Tb3+的4f-5d电荷转移带，观察到Tb3+的低发光，而用633 nm的紫外光刺激玻璃，观察到PSL。LLL的衰减曲线在初始阶段符合二级动力学，在后一阶段符合一级动力学。在紫外光照射下，产生了电子自旋共振信号，其强度衰减与LLL的后一组分相吻合。在633 nm光照射下，PSL的出现明显降低了ESR信号的强度。样品在77K下的热释光光谱由~240K和~380K两个峰组成，低温峰和高温峰分别由一个F中心(两个电子捕获在氧空位)和一个F+中心(一个电子捕获在氧空位)组成。结果表明，F中心的电子和F+中心的电子分别对LLL和PSL的产生起主要作用。

项目成果

T. Kinoshita & H. Hosono: "Materials design and example of long lasting phosphorescent glasses utilizery electron trapped centers"J. Non-Crystalline Solids. 274. 257-263 (2000)

T·木下

細野秀雄 他: "光を蓄えるガラス"化学と工業. 52. 620-624 (1999)

Hideo Hosono 等人：“储存光的玻璃”化学与工业 52. 620-624 (1999)。

H.Hosono, T.Kinoshita, M.Yamazaki: "Long Lasting phosphorescence properties of Tb3+- activated reduced calcium aluminate glasses"Journal of Physics : Condensed matters. 16. 6541-47 (1999)

H.Hosono、T.Kinoshita、M.Yamazaki：“Tb3 活化的还原铝酸钙玻璃的持久磷光特性”物理学杂志：凝聚态物质。

木下健: "Materials Design and Example of Long Lasting Phosphorescencent Glasses Utilizing Elootron Trappod Conters"Journal of Non-Crystalline Solids. (印刷中). (2000)

Ken Kinoshita：“利用 Elootron Trappod Conters 的长效磷光玻璃的材料设计和实例”非晶体固体杂志（2000 年出版）。

H. Hosono et al.: "Long Lasting Phosphorescence Propertes of Tb^<3+>-actived glasses"J. Physics : Condensed Matters. 16. 6541-47 (1999)

H. Hosono等人：“Tb^3-活性玻璃的长效磷光特性”J。