- 著者
- Naoyoshi NUNOTANI Marina TAIRA Nobuhito IMANAKA
- 出版者
- The Ceramic Society of Japan
- 雑誌
- Journal of the Ceramic Society of Japan (ISSN:18820743)
- 巻号頁・発行日
- vol.130, no.1, pp.44-48, 2022-01-01 (Released:2022-01-01)
- 参考文献数
- 27
Green-emitting phosphors of Rb3La1−xTbxSi2O7 with a K3NdSi2O7-type structure were synthesized via a solid-state reaction technique. Their crystal structures and photoluminescence properties were investigated. Crystal structural analyses of Rb3LaSi2O7 and Rb3TbSi2O7 were carried out for the first time and revealed that the rare-earth sites (La or Tb) were separated by the RbO6 and SiO4 units. According to photoluminescence spectroscopy of Rb3La1−xTbxSi2O7 monitored at 249 and 481 nm, the highest emission intensity was obtained for the Rb3TbSi2O7 phosphor under the 481-nm excitation, which indicates that the satisfactory separation of the Tb3+ ions suppressed the concentration quenching. The intensity of Rb3TbSi2O7 was 32 % in comparison to that of the commercial green-emitting (La0.52Ce0.31Tb0.17)PO4 phosphor.