武田 隆史


武田 隆史

J-GLOBALへ         更新日: 19/10/15 22:09
 
アバター
研究者氏名
武田 隆史
 
タケダ タカシ
URL
https://www.nims.go.jp/research/group/sialon/
所属
国立研究開発法人物質・材料研究機構
部署
機能性材料研究拠点
職名
主幹研究員
学位
博士(理学)(神戸大学)

プロフィール

2001年12月 - 2002年6月 東北大学工学研究科助手
2002年7月 - 2007年5月 北海道大学工学研究科助手、助教
2007年5月 - 現在 物質・材料研究機構 主任研究員、主幹研究員

研究分野

 
 

論文

 
Takashi Takeda, Rong-Jun Xie, Takayuki Suehiro, Naoto Hirosaki
Progress in Solid State Chemistry   51 41-51   2018年9月   [査読有り]
Si,Al containing nitride and oxynitride phosphors have been applied to white LEDs. Phosphors play important roles to produce high color rendering in lighting and wide color gamut in display. Si,Al containing nitrides and oxynitrides have been stud...
Peng Zheng, Shuxing Li, Le Wang, Tian-Liang Zhou, Shihai You, Takashi Takeda, Naoto Hirosaki, Rong-Jun Xie
ACS Applied Materials & Interfaces   10(17) 14930-14940   2018年5月   [査読有り]
As a next-generation high-power lighting technology, laser lighting has attracted great attention in high-luminance applications. However, thermally robust and highly efficient color converters suitable for high-quality laser lighting are scarce. ...
Le Wang, Rong-Jun Xie, Takayuki Suehiro, Takashi Takeda, Naoto Hirosaki
Chemical Reviews   118(4) 1951-2009   2018年2月   [査読有り]
Advances in solid state white lighting technologies witness the explosive development of phosphor materials (down-conversion luminescent materials). A large amount of evidence has demonstrated the revolutionary role of the emerging nitride phospho...
Jumpei Ueda, Setsuhisa Tanabe, Kohsei Takahashi, Takashi Takeda, Naoto Hirosaki
Bulletin of the Chemical Society of Japan   91(2) 173-177   2018年2月   [査読有り]
CaAlSiN3:Eu2+ is a widely applied phosphor in white LEDs (w-LEDs) because of strong blue absorption and efficient red luminescence with high thermal quenching temperature. Thegood stability against thermal quenching has been well established, but ...
Shuxing Li, Le Wang, Daiming Tang, Yujin Cho, Xuejian Liu, Xingtai Zhou, Lu Lu, Lin Zhang, Takashi Takeda, Naoto Hirosaki, Rong-Jun Xie
Chemistry of Materials   30(2) 494-505   2018年1月   [査読有り]
β-Sialon:Eu2+ has been reported to be the mostpromising narrow-band green phosphor for wide color gamut LCD backlights, but the coexistence of the Eu3+ luminescence killer with the Eu2+ luminescence center limits its luminescence performance to a ...

書籍等出版物

 
単粒子診断法
武田 隆史
2016年   
新蛍光体は様々な分野で常に求められている。母体物質に発光中心をドープする発光中心型では母体物質の選択が重要である。既知物質を蛍光体母体に用いた場合には、発光中心の種類、添加量、共添加、形態制御、固溶体合成、複合体合成など様々な方法が可能である。もうひとつの重要かつ有効な方法は新物質を蛍光体母体に使用することである。Eu2+やCe3+など発光に関与する電子軌道が空間的に広がっている発光中心の発光は配位環境の影響を受けやすく、発光波長、励起波長など発光特性は配位環境により大きく変化する。新物質...

講演・口頭発表等

 
A12X13型新青色酸窒化物蛍光体の結晶構造と発光特性
FUNAHASHI, Shiro, HIROSAKI, Naoto, TAKEDA, Takashi, XIE, Rong-Jun
第79回 応用物理学会秋季学術講演会   2018年9月18日   
Structural Evolutions and Significantly Reduced Thermal Degradation of Red-Emitting Sr2Si5N8:Eu2+ via Carbon Doping
LIU, Lihong, Wang Le, Li yuanqiang, ZHANG, Chenning, CHO, Yujin, Or SiuWing , Zhou Tianliang, TAKEDA, Takashi, HIROSAKI, Naoto, Xie Rong-Jun
International Conference on Ceramic Materials and Components for   2018年7月22日   
Sr2Si5N8:Eu2+ shows very promising photoluminescence properties but exhibits serious thermal degradation, thus making it difficult to be used pratically as a color converter in white light-emitting diodes (wLEDs). To alleviate this problem, we int...
Effect of Mn-doping on the properties of Mn, Mg-codopedγ-AlON green phosphor
CHO, Yujin, TAKEDA, Takashi, TAKAHASHI, Kohsei, KIMURA, Takashi, XIE, Rong-Jun, HIROSAKI, Naoto, SEKIGUCHI, Takashi
JSAP spring meeting 2018   2018年3月17日   
Recently, narrow-band emitting phosphors attract particular attention for the application in white LED backlight in 8K-LCD TV, mobile phone, or tablet PCs.γ-AlON: Mg2+, Mn2+ is a promising candidate showing high color purity in green, small therma...
Luminescent Materials for Laser-Driven Solid State Lighting
XIE, Rong-Jun, LI, Shuxing, TAKEDA, Takashi, HIROSAKI, Naoto
3rd Intl. Conf. on MLand Novel Struct. Health Diagnosis   2017年12月15日   
In this work, we reported the preparation and optical properties of luminescent ceramics for use in laser-driven solid state lighting, which include yellow-emitting YAG/Al2O3 and red-emitting CaAlSiN3:Eu2+ ceramics. These phosphor ceramics exhibit...
Nitride Phosphors and Their Applications
XIE, Rong-Jun, TAKEDA, Takashi, HIROSAKI, Naoto
第9回中国希土類発光材料学術シンポジウム及び国際フォーラム   2017年11月30日   
In this invited presentation, we will overview the rare-earth doped nitride phosphors and their applications in white LEDs, laser lighting, and field emission displays.