Examination of local structure of the ns2-type emission centers in glass phosphors and the emission properties

2017 Fiscal Year Final Research Report

• Project/Area Number: 26709048
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: National Institute of Advanced Industrial Science and Technology (2016-2017); Kyoto University (2014-2015)
• Principal Investigator: MASAI Hirokazu 国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (10451543)
• Co-Investigator(Renkei-kenkyūsha): YANAGIDA Takayuki 奈良先端科学技術大学院大学, 先端科学技術研究科, 教授 (20517669) ; KAWAGUCHI Noriaki 奈良先端科学技術大学院大学, 先端科学技術研究科, 准教授 (50642782) ; OKADA Go 奈良先端科学技術大学院大学, 先端科学技術研究科, 助教 (90757840) ; KOREEDA Akitoshi 立命館大学, 理工学部, 教授 (40323878) ; OHKUBO Takahiro 千葉大学, 大学院工学研究科, 准教授 (50534541) ; KOHARA Shinji 物質材料研究機構, 先端材料解析研究拠点, 主幹研究員 (90360833) ; ONODERA Yohei 京都大学, 複合原子力科学研究所, 助教 (20531031) ; YAMADA Yasuhiro 千葉大学, 大学院理学研究科, 准教授 (50532636)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: ガラス / 発光 / 蛍光体 / XANES / ns2型中心 / ネットワーク構造

Outline of Final Research Achievements

In this study, I examined optical properties, luminescent properties of oxide glasses and amorphous films containing ns2 type cations, such as Sn2+, In+. I find that the luminescence properties and local coordination states is affected not only by the glass network but also by the cooling process from the supercooled liquid state. We also discussed differences in luminescence between other luminescent centers and the ns2 type center. In addition, the difference between radiation-induced luminescence and conventional fluorescence is discussed. I have emphasized that both the local coordination state of activators and the network structure are important for glass-based emitting materials.

Free Research Field

無機材料科学