• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Developments of Low-driving voltage Organic EL devices by Chemically Doping

Research Project

Project/Area Number 15205023
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials/Devices
Research InstitutionYamagata university

Principal Investigator

KIDO Junji  Yamagata university, engineering, professor, 工学部, 教授 (50214838)

Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥48,620,000 (Direct Cost: ¥37,400,000、Indirect Cost: ¥11,220,000)
Fiscal Year 2005: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2004: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2003: ¥26,910,000 (Direct Cost: ¥20,700,000、Indirect Cost: ¥6,210,000)
Keywordsorganic EL / chemically doping / electron-transporting / hole-transporting / oligomer / アリールアミン / アルカリ金属 / 電子輸送性材料 / フェニルピリジン / フェナントロリン / 低電圧化
Research Abstract

For lowering driving-voltage of organic EL devices, new electron and hole-transporting materials were synthesized and applied to organic EL devices to characterize their EL properties. As for electron-transporting materials, phenanthroline, quinoline and phenyl pyridine derivatives were synthesized and applied to organic EL devices as an electron-transporting layer. The synthesized materials have high glass transition temperatures and showed good uniformity of thin films. The devices used new electron-transporting materials showed lower driving voltage than that of Alq, which have been used for good electron-transporting materials. From these results, Phenanthroline, quinoline and phenylprydine derivatives are expected to be useful as good electron-tranporting materials. Then rare-earth metals were investigated for new chemically doping materials for an electron injection layer. Specifically, Yb showed suitable properties of vacuum deposition and electron-injection ability for Alq, whi … More ch was chemically doping matrix. This result suggests that they will be used for chemically doping materials other than alkaline metals, such as Cs and Li, and expanding a choice of electron injeciton layers for lowering driving-voltage.
As for hole-transporting materials, new arylamine origomers having fluorene units were synthesized and applied to organic EL devices. These new oligomers have high glass transition temperatures, and can be formed good thin films by spin-coating and vacuum-evaporation methods. Therefore these oligomers are expected to be useful materials for mass-production and manufacturing of organic EL devices. The devices fabricated by spin-coating were showed lower driving voltage, compared with vacuum-evaporated ones. These results were understood by measurements of hole mobilities by TOF and surface morphology observation by SPM. In addition, these aryamine oligomers formed charge-transfer complex with Lewis acid and an electron-acceptor in solution. Then the films from the solutions showed good hole-injection abilities, and the chemically doping layers achieved lower driving-voltage. Less

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (3 results)

All 2005 Other

All Journal Article (3 results)

  • [Journal Article] Organic lightemitting devices having chemically-doped aryamine oligomer as a hole injection layer2005

    • Author(s)
      Takayuki Ito, Jiro Asaka, L.K.Dao T, Junji Kido
    • Journal Title

      Polymers for Advanced technologies 16・7

      Pages: 559-562

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Organic lightemitting devices having chemically-deoped aryamine oligomer as a hole injection layer2005

    • Author(s)
      Takayuki Ito, Jiro Asaka, L. K. Dao T, Junji Kido
    • Journal Title

      Polymers for Advanced technologies 16・7

      Pages: 559-562

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Organic lightemitting devices having chemically-doped aryamine oligomer as a hole injection layer

    • Author(s)
      Takayuki Ito, Jiro Asaka, L.K.Dao T, Junji Kido
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

URL: 

Published: 2003-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi