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Achieving ultra-broadband LEDs by elucidating the degradation mechanism of highly efficient near-infrared phosphors and developing high-performance binders

Research Project

Project/Area Number 21H01630
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Fukuda Takashi  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 総括研究主幹 (50357894)

Co-Investigator(Kenkyū-buntansha) 正井 博和  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)
許 健  国立研究開発法人物質・材料研究機構, 若手国際研究センター, ICYSリサーチフェロー (10889918)
芦葉 裕樹  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (90712216)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2021: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Keywords次世代産業用光源 / 超広帯域LED / 新規近赤外蛍光体 / 高耐久性バインダ材料 / デバイス化プロセス開発
Outline of Research at the Start

ハロゲンランプを代替しうる革新的次世代光源(高輝度・超広帯域の発光を可能とするLED光源)を実現するため、新規近赤外蛍光体の劣化機構の解明と劣化抑制技術の開発・耐UV/高透明性バインダの新規開発・近赤外蛍光体のさらなる長波長化と量子効率向上を目指した材料探索・材料の素子化技術の確立・試作デバイスの諸特性評価などの課題に取組む。また、素子開発にのみ終始するのではなく、蛍光体・ガラスの科学における新しいトピックスや材料設計指針の提起をもたらすべく基礎科学的研究を推進する。

Outline of Final Research Achievements

In this research, to utilize our high-performance phosphors as next-generation industrial ultra-wideband LEDs, we investigated the deterioration mechanism and developed each process such as a process to obtain highly transparent remote phosphor in which the high-performance phosphors dispersed in UV and heat-resistant binder materials with low glass-transition temperature., and heat exhaust technology using high thermal conductivity materials. As a result, we succeeded in establishing the basis for a device fabrication process. We also confirmed that the phosphor is stable for an extremely long time (estimated half-life time >200,000 hours) under conditions that suppress deterioration factors, paving the way for practical devices.
We also worked on searching for materials to further extend the luminescent wavelength of near-infrared phosphors and improve their quantum efficiency, as well as on bio-medical sensing applications.

Academic Significance and Societal Importance of the Research Achievements

次世代産業用超広帯域LEDの実現には、① 高量子効率蛍光体の開発、② 蛍光体の長期安定発光のための技術開発、③ 高輝度化のための素子化技術開発、④ 耐UV性・耐熱性・高透明性・加工性に優れたバインダ材料の開発、⑤ 高熱伝導材料の採用による排熱技術の開発、⑥ 光散乱を抑え、高い光取出し効率を実現するための知見と技術開発などの多くの要素の醸成が必要であるが、それぞれの革新を図るには基礎科学的洞察に立脚した仮説とその検証が必須である。本研究では、特に、劣化機構解明②と新材料開発④の推進を軸に、③、⑤、⑥の検討も組合せながら、実用デバイスの実現に向け道筋をつけることが出来た点で有意義であったと言える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (22 results)

All 2024 2023 2022 2021

All Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (2 results)

  • [Journal Article] Key Role of Metal-to-Metal Charge Transfer Transition between Mo<sup>6+</sup> and Bi<sup>3+</sup> for Enhancement in NIR Luminescence of Gd<sub>2</sub>MoO<sub>6</sub>:Bi,Yb Nanophosphor2024

    • Author(s)
      Hangai Taisei、Hasegawa Takuya、Xu Jian、Nakanishi Takayuki、Takeda Takashi、Nakano Kosuke、Hongo Kenta、Maezono Ryo、Goto Tomoyo、Sato Yasushi、Okawa Ayahisa、Yin Shu
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 128 Issue: 8 Pages: 3351-3360

    • DOI

      10.1021/acs.jpcc.3c07501

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Charge trapping for controllable persistent luminescence in organics2024

    • Author(s)
      Cunjian Lin, Zishuang Wu, Huili Ma, Jianbin Liu, Shihai You, Anqi Lv, Wenpeng Ye, Jian Xu, Huifang Shi, Baoli Zha, Wei Huang, Zhongfu An, Yixi Zhuang, Rong-Jun Xie
    • Journal Title

      Nature Photonics

      Volume: 18 Issue: 4 Pages: 350-356

    • DOI

      10.1038/s41566-024-01396-0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Data analysis of compositional distribution and glass transition temperature of low-melting phosphate glass using big data2023

    • Author(s)
      Hirokazu Masai, Toshiyuki Mihara and Kenji Kintaka
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: 131 Issue: 8 Pages: 466-474

    • DOI

      10.2109/jcersj2.23037

    • ISSN
      1348-6535, 1882-0743
    • Year and Date
      2023-08-01
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neodymium(III)-doped Y<sub>3</sub>Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub> garnet for multipurpose ratiometric thermometry: From cryogenic to high temperature sensing2023

    • Author(s)
      Back Michele、Xu Jian、Ueda Jumpei、Tanabe Setsuhisa
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: 131 Issue: 4 Pages: 57-61

    • DOI

      10.2109/jcersj2.22167

    • ISSN
      1348-6535, 1882-0743
    • Year and Date
      2023-04-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Revealing the Intrinsic Decay of Mechanoluminescence for Achieving Ultrafast-Response Stress Sensing2023

    • Author(s)
      Changjian Chen, Zhu Lin, Honghui Huang, Xin Pan, Tian-Liang Zhou, Hongde Luo, Libo Jin, Dengfeng Peng, Jian Xu, Yixi Zhuang, Rong-Jun Xie
    • Journal Title

      Advanced Functional Materials

      Volume: 33 Issue: 46 Pages: 2304917-2304917

    • DOI

      10.1002/adfm.202304917

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Data analysis of compositional distribution and glass transition temperature of low-melting phosphate glass using big data2023

    • Author(s)
      H. Masai, T. Mihara, K. Kintaka
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Thermochromic Narrow Band Gap Phosphors for Multimodal Optical Thermometry: The Case of Y3+-Stabilized β-Bi2O3:Nd3+2022

    • Author(s)
      M. Back, J. Xu, J. Ueda, A. Benedetti, S. Tanabe
    • Journal Title

      Chemistry of Materials

      Volume: 34 Issue: 18 Pages: 8198-8206

    • DOI

      10.1021/acs.chemmater.2c01262

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cyan-Emitting Sialon-Polytypoid Phosphor Discovered by a Single-Particle-Diagnosis Approach2021

    • Author(s)
      Jian Xu, Shiro Funahashi, Kohsei Takahashi, Takayuki Nakanishi, Naoto Hirosaki, Takashi Takeda
    • Journal Title

      ECS Journal of Solid State Science and Technology

      Volume: 10 Issue: 11 Pages: 1160021-6

    • DOI

      10.1149/2162-8777/ac331c

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Discovery of New (Oxy)nitride Phosphors by Single-Particle-Diagnosis Approach & Time-Resolved Spectroscopy2024

    • Author(s)
      Jian Xu, Shiro Funahashi, Kohei Takahashi, Takayuki Nakanishi, Naoto Hirosaki, Takashi Takeda
    • Organizer
      The International Conference on the Science and Technology for Advanced Ceramics (STAC-13) & Data Driven Materials Research for Electronics (D2MatE)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] データベースを用いた低融点リン酸塩ガラスにおけるデータ解析2023

    • Author(s)
      正井博和・三原敏行・金高健二
    • Organizer
      公益社団法人日本セラミックス協会 第36回秋季シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of Ultra-broadband LED using Novel High-efficiency Near-infrared Phosphors2022

    • Author(s)
      福田 隆史
    • Organizer
      2022 International Conference on Organic Photonics and Electronics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] New insights into the saturation mechanism of Ce3+/Eu2+doped LED phosphors under high-power laser excitation2022

    • Author(s)
      許 健, 高橋 向星, 中西 貴之, 広崎 尚登, 武田 隆史
    • Organizer
      第38回希土類討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Discovery of New (oxy)nitride phosphors by single-particle-diagnosis approach and time-resolved spectroscopy2022

    • Author(s)
      許 健, 舟橋 司朗, 中西 貴之, 高橋 向星, 広崎 尚登, 武田 隆史
    • Organizer
      応用物理学会第83回秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Insights into Multi-Band Emission of Inorganic (Persistent) Phosphors by Time-Resolved Spectroscopy2022

    • Author(s)
      許 健, 中西 貴之, 高橋 向星, 広崎 尚登, 武田 隆史
    • Organizer
      応用物理学会 極限的励起状態の形成と量子エネルギー変換研究グループ 第7回研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Revisiting the Eu2+ Emission in CaAlSiN3 (CASN) Red Phosphor by Time-Resolved Spectroscopy2022

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Naoto Hirosaki, Takashi Takeda
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Saturation Mechanism of Ce3+/Eu2+-Doped LED Phosphors Under High-Power Excitation2022

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Naoto Hirosaki, Takashi Takeda
    • Organizer
      日本セラミックス協会2022年年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Insights into the multi-site emission from SrAl2O4:Eu2+-Dy3+ persistent phosphors by time-resolved streak imaging2021

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Takashi Takeda, Naoto Hirosaki
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Low temperature time-resolved spectroscopy of the multi-site emission in SrAl2O4:Eu2+-Dy3+2021

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Takashi Takeda, Naoto Hirosaki
    • Organizer
      第37回希土類討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Revisiting the Multi-site Emission from SrAl2O4:Eu2+-Dy3+ by Time-resolved Spectroscopy2021

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Takashi Takeda, Naoto Hirosaki
    • Organizer
      日本セラミックス協会 第34回秋季シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Insights Into the Saturation Mechanism of LED Phosphors2021

    • Author(s)
      Jian Xu, Kohsei Takahashi, Takayuki Nakanishi, Takashi Takeda, Naoto Hirosaki
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Book] Phosphor Handbook (3rd edition)2022

    • Author(s)
      Jian Xu, Michele Back, Setsuhisa Tanabe
    • Total Pages
      56
    • Publisher
      CRC Press
    • ISBN
      9781003098669
    • Related Report
      2021 Annual Research Report
  • [Book] Solid-State Lighting2021

    • Author(s)
      Jian Xu, Xin Liu, Jiang Li
    • Total Pages
      87
    • Publisher
      Wiley Blackwell
    • ISBN
      9781119538806
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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