Dendrimer-type phosphorescent metal complexes for solution-processed organic-light-emtting devices

• Project/Area Number: 21685014
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Functional materials chemistry
• Research Institution: Yamagata University
• Principal Investigator: PU Yong-jin 山形大学, 大学院・理工学研究科, 准教授 (00350489)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥27,690,000 (Direct Cost: ¥21,300,000、Indirect Cost: ¥6,390,000); Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2010: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2009: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
• Keywords: 電気 / 磁気的機能 / 先端機能デバイス / 有機半導体 / 電子・電気材料 / 合成化学 / 有機EL / デンドリマー / イリジウム錯体 / リン光

Research Abstract

Phosphorescent iridium complexes covalently fully-surrounded by dendronized aryl groups were synthesized. The dendron-type phosphorescent complexes exhibited high photoluminescence quantum efficiency even in aggregated film state, due to the suppressed concentration quenching. The organic light-emitting devices with the complexes were fabricated from solution-process, and showed high efficiencies.

Research Products

• [Journal Article] Optimizing the charge balance of fluorescent organic light-emitting devices to achieve high external quantum efficiency beyond the conventional upper limit (2012)
  • Author(s): Y.-J.Pu
  • Journal Title: Advanced Materials Volume: 24 Issue: 13 Pages: 1765-1770
  • DOI: 10.1002/adma.201104403
  • Peer Reviewed
• [Journal Article] fac-Tris (2-phenylpyridine) iridium (III) s, covalently surrounded by six bulky host dendrons, for a highly efficient solution-processed organic light emitting device (2011)
  • Author(s): Yong-Jin Pu, Noriaki Iguchi, Naoya Aizawa, Hisahiro Sasabe, Ken-ichi Nakayama, Junji Kido
  • Journal Title: Organic Electronics Volume: 12 Issue: 12 Pages: 2103-2110
  • DOI: 10.1016/j.orgel.2011.08.015
  • Peer Reviewed
• [Journal Article] Ultra-high efficiency by multiple emission from stacked organic light-emitting devices (2011)
  • Author(s): T.Chiba
  • Journal Title: Organic Electronics Volume: 12 Pages: 710-715
  • Peer Reviewed
• [Journal Article] Hole mobility measurement of 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl by dark injection method (2011)
  • Author(s): T.Chiba
  • Journal Title: Chemical Physics Letters Volume: 502 Pages: 118-120
  • Peer Reviewed
• [Journal Article] Bifluorene compounds containing carbazole and/or diphenylamine groups and their bipolar charge transport properties in organic light emitting devices (2010)
  • Author(s): K.Noine
  • Journal Title: Organic Electronics 11 Pages: 717-723
  • Peer Reviewed
• [Journal Article] Arylamino-9,10-diphenylanthracenes for organic light emitting devices (2010)
  • Author(s): Y.-J.Pu
  • Journal Title: Organic Electronics 11 Pages: 479-485
  • Peer Reviewed
• [Journal Article] Synthesis, photoluminescence and electroluminescence properties of iridium complexes with bulky carbazole dendrons (2009)
  • Author(s): Noriaki Iguchi, Yong-Jin Pu, Ken-ichi Nakayama, Masaaki Yokoyama, Junji Kido
  • Journal Title: Organic Electronics Volume: 10 Issue: 3 Pages: 465-472
  • DOI: 10.1016/j.orgel.2009.01.014
  • Peer Reviewed
• [Presentation] Highly Efficient Multilayered Solution-Processed Organic Light Emitting Devices (2012)
  • Author(s): Yong-Jin Pu, et al
  • Organizer: 韓国化学工学会春季年会Flexible & Printed Electronics International Symposium for Green Technology
  • Place of Presentation: 済州島,韓国
  • Year and Date: 2012-04-26
• [Presentation] Highly Efficient Multilayered Solution-Processed Organic Light Emitting Devices (2011)
  • Author(s): Yong-Jin Pu, et al
  • Organizer: 3rd Asian Conference on Organic Electronics
  • Place of Presentation: 台湾
  • Year and Date: 2011-11-06
• [Presentation] Highly Efficient Multilayered Solution-Processed Organic Light Emitting Devices (2011)
  • Author(s): Y.-J.Pu
  • Organizer: 3rd Asian Conference on Organic Electronics
  • Place of Presentation: 台北・台湾(招待講演)
  • Year and Date: 2011-11-06
• [Presentation] Solution processable small molecules for organic light emitting devices (2010)
  • Author(s): Yong-Jin Pu, et al
  • Organizer: 2010 International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: ハワイ,米国
  • Year and Date: 2010-12-19
• [Presentation] Solution processable small molecules for organic light emitting devices (2010)
  • Author(s): Y.-J.Pu
  • Organizer: 2010 International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Honolulu、米国
  • Year and Date: 2010-12-19
• [Presentation] Materials Chemistry for Highly Efficient Organic Light Emitting Diodes (2010)
  • Author(s): Y.-J.Pu
  • Organizer: 3rd WCU Symposium on Nanobio Materials and Electronics
  • Place of Presentation: 光州科学技術院,韓国(招待講演)
  • Year and Date: 2010-09-03
• [Presentation] Electroluminescent small molecules for solution processed organic light emitting devices (2010)
  • Author(s): Y.-J.Pu
  • Organizer: SPIE Optics+Photonics
  • Place of Presentation: San Diego,米国(招待講演)
  • Year and Date: 2010-08-02
• [Presentation] Phosphorescent iridium complexes having dendronized carbazole or diphenylamine groups for a solution processable organic light emitting device (2009)
  • Author(s): Yong-Jin Pu, et al
  • Organizer: 11th Pacific Polymer Conference
  • Place of Presentation: ケアンズ・オーストラリア
  • Year and Date: 2009-12-07
• [Presentation] Phosphorescent Iridium complexes having dendronized carbazole or diphenylamine for a solution processable organic light emitting device (2009)
  • Author(s): Yong-Jin Pu, et al
  • Organizer: 1st Asian Conference on Organic Electronics
  • Place of Presentation: ザ・ルイガンズ福岡(福岡市)
  • Year and Date: 2009-09-03
• [Presentation] Phosphorescent Iridium complexes having dendronized carbazole or diphenylamine for a solution processable organic light emitting device (2009)
  • Author(s): Y.-J.Pu
  • Organizer: 1st Asian Conference on Organic Electronics
  • Place of Presentation: 福岡
  • Year and Date: 2009-09-03