Development of quantum cutting phosphor materials for efficacy improvement of mercury-free fluorescent lamps

2012 Fiscal Year Final Research Report

• Project/Area Number: 22360038
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Applied physics, general
• Research Institution: Ehime University
• Principal Investigator: JINNO Masafumi 愛媛大学, 大学院・理工学研究科, 教授 (30274335)
• Co-Investigator(Kenkyū-buntansha): MOTOMURA Hideki 愛媛大学, 大学院・理工学研究科, 准教授 (80332831) ; UEMURA Akira 愛媛大学, 大学院・理工学研究科, 助教 (40274336) ; TACHIBANA Kunihide 愛媛大学, 大学院・理工学研究科, 教授 (40027925)
• Co-Investigator(Renkei-kenkyūsha): GOTOH Hidekazu 大阪大学, 工学研究科, 准教授 (80170463)
• Project Period (FY): 2010 – 2012
• Keywords: 量子分割蛍光体 / プラセオジム / UV蛍光体 / LED / 無水銀光源

Research Abstract

For the purpose of efficacy improvement of mercury-free light sources, the authors focused on quantum cuttingprocess in a special phosphor materials, in which two visible photons were emitted by one-photon excitation. During optimization of the mixtures of raw materials and sintering conditions, it is found that existence of STE (self-trapped excitation) band in the hand structure of sintered quantum cutting phosphor lowers its quantum efficiency. A Xe DBD lamp with the developed phosphor (SrAl12O19:Pr3+) showed high color temperature (7360 K) emission, which showed a possibility of a practical use as a white light emission phosphor. Another host crystal (SrAl2O4) with Pr3+dopant showed UV-C (252 nm) emission, which will be utilized for sterilization or cleaning purpose.

Research Products

• [Journal Article] Fluorescence Properties of SrAl12O19:Pr3+Quantum Cutting Phosphor (2013)
  • Author(s): Y. Ikeda, K. Masada, H. Kurokawa, H. Motomura, M. Jinno and K. Tachibana
  • Journal Title: Journal of Physics D: Applied Physics Volume: Vol. 46 Pages: 065306
  • DOI: DOI:10.1088/0022-3727/46/6/065305
  • Peer Reviewed
• [Presentation] UV-C Emitting Phosphor SrAl2O4:Pr3+under VUV Excitation (2012)
  • Author(s): Yoshihisa Ikeda, Yuki Kubo, Hisayoshi Kurokawa, Hideki Motomura, Masafumi Jinno and Kunihide Tachibana
  • Organizer: International Symposium for Phosphor Materials 2012
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2012-11-16
• [Presentation] 無水銀殺菌ランプのための紫外放射蛍光体SrAl_2O_4:Pr^ (2012)
  • Author(s): 久保 友紀、池田 善久、本村 英樹、神野雅文、橘 邦英
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 松山
  • Year and Date: 2012-09-13
• [Presentation] 量子分割蛍光体SrAl12O19:Pr3+におけるAlF3の融剤としての効果 (2012)
  • Author(s): 久保 友紀、池田 善久、政田 洸平、本村英樹、神野 雅文、橘 邦英
  • Organizer: 第45回照明学会全国大会
  • Place of Presentation: 山口
  • Year and Date: 2012-09-07
• [Presentation] Development of UV-C Emitting Phosphor for Sterilization Purpose (2012)
  • Author(s): Yuki Kubo, Yoshihisa Ikeda, Hideki Motomura, Masafumi Jinno and Kunihide Tachibana
  • Organizer: 2012 CJK Lighting Conference
  • Place of Presentation: Tokyo
  • Year and Date: 2012-08-24
• [Presentation] 遠赤外線集光加熱による量子分割蛍光体SA:Pr^の結晶成長促進 (2012)
  • Author(s): 政田 洸平、久保 友紀、池田 善久、本村英樹、神野 雅文、橘 邦英
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 厚木
  • Year and Date: 2012-03-16
• [Presentation] Fluorescence Properties of SrAl12O19:Pr3+Quantum Cutting Phosphor (2011)
  • Author(s): Y. Ikeda, K. Masada, H. Kurokawa, H. Motomura, M. Jinno, K. Tachibana
  • Organizer: he Fourth Asia-Pacific Light Sources Workshop 2011
  • Place of Presentation: Jong-Li, Taiwan
  • Year and Date: 20110413-14
• [Presentation] Study on Photoluminescence Characteristics of Pr3+Activated Strontium Aluminate as Quantum Cutting Phosphor (2011)
  • Author(s): K. Masada, Y. Ikeda, H. Motomura, M. Jinno and K. Tachibana
  • Organizer: International Symposium on Phosphor Materials 2011
  • Place of Presentation: Niigata
  • Year and Date: 2011-11-22
• [Presentation] LD preparation and evaluation of BaMgAl10O17:Eu2+nanoparticle phosphor (2011)
  • Author(s): Y. Ikeda, K. Masada, H. Motomura, M. Jinno and K. Tachibana
  • Organizer: International Symposium on Phosphor Materials 2011
  • Place of Presentation: Niigata
  • Year and Date: 2011-11-22
• [Presentation] 量子分割蛍光体SrAl_12O_19:Pr^の発光特性 (2011)
  • Author(s): 政田 洸平、池田 善久、本村 英樹、神野雅文、橘 邦英
  • Organizer: 第44回照明学会全国大会
  • Place of Presentation: 松山
  • Year and Date: 2011-09-16
• [Presentation] PLD によるBaMgAl_10O_17:Eu^ナノ蛍光体の作製と評価 (2011)
  • Author(s): 池田 善久、政田 洸平、本村 英樹、神野雅文、橘 邦英
  • Organizer: 第44回照明学会全国大会
  • Place of Presentation: 松山
  • Year and Date: 2011-09-16
• [Presentation] 量子分割蛍光体SA:Pr^の発光特性の研究 (2011)
  • Author(s): 政田 洸平、池田 善久、本村 英樹、神野雅文、橘 邦英
  • Organizer: 第58回応用物理学関係連合講演会
  • Place of Presentation: 厚木
  • Year and Date: 2011-03-26
• [Presentation] 量子分割蛍光体SAO:Pr^の発光特性の研究 (2010)
  • Author(s): 池田 善久、政田 洸平、本村 英樹、神野雅文、橘 邦英
  • Organizer: 第43回照明学会全国大会
  • Place of Presentation: 大阪
  • Year and Date: 2010-09-07
• [Presentation] Photon Cascade Emission of Pr3+in Stronrium Aluminate (2010)
  • Author(s): Y. Ikeda, K. Masada, H. Kurokawa, H. Motomura, M. Jinno, K. Tachibana
  • Organizer: 12th International Symposium on the Science and Technology of Light Sources and the 3rd International Conference on White LEDs and Solid State Lighting, Eindhoven
  • Place of Presentation: Netherland
  • Year and Date: 2010-07-15