Photodynamics of White Luminescence in Organic Thin Films

有机薄膜中白光发光的光动力学

基本信息

  • 批准号:
    13450011
  • 负责人:
  • 金额:
    $ 5.38万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2002
  • 项目状态:
    已结题

项目摘要

This research was carried out to investigate the photodynamics for white luminescence in organic thin films composed of DCM, Alq, and PBD (or PPCP), which exhibit red, green, and blue luminescence, respectively. The results are summarized as follows;1. HOMO-LUMO levels of PBD, Alq, and DCM possess type-I energy lineup, while those of PPCP and Alq type-II lineup.2. Mechanism of white luminescence in PPCP/Alq double layer EL device was investigated, and a new device structure utilizing red photoluminescence (PL) of DCM is proposed.3. PBD layers codoped with Alq and DCM exhibit white luminescence depending on the composition. The mechanism of white luminescence has been found to be energy transfer from PBD to Alq and to DCM, and also from Alq to DCM. Time constants for some of the above energy transfer were obtained.4. Time-resolved PL was measured under the resonant excitation of the incident laser to the absorption of PBD or Alq. The result shows that for the more pure white luminescence the luminescence of DCM derived by the energy transfer from Alq is desirable.5. Luminescence from DCM has been attributed to the relaxation from Alq with short time constant and from PBD at longer time constant.6. No remarkable energy transfer has been recognized from PBD to Alq. When bothe PBD and Alq are excited, the molecule contribute to blue and green luminescence, respectively, and then the energy transfer to DCM results in red luminescence. DCM cannot be efficiently excited by photo irradiation.
本研究以DCM、Alq和PBD(或PPCP)组成的有机薄膜为研究对象,分别研究了其红光、绿色和蓝光的白色发光动力学。研究结果如下:1. PBD、Alq和DCM的HOMO-LUMO能级具有I型能量序列,而PPCP和Alq的HOMO-LUMO能级具有II型能量序列.研究了PPCP/Alq双层电致发光器件的白色发光机理,提出了一种利用DCM红光发光的新型器件结构.共掺杂有Alq和DCM的PBD层根据组成表现出白色发光。白色发光的机理是PBD向Alq和DCM以及Alq向DCM的能量转移。得到了上述能量传递的时间常数.在入射激光对PBD或Alq吸收的共振激发下测量了时间分辨光致发光。结果表明,对于更纯的白色发光,DCM的发光是由Alq的能量转移得到的. DCM的发光归因于Alq的弛豫时间常数较短,而PBD的弛豫时间常数较长。没有显着的能量转移已被确认从PBD到Alq。当PBD和Alq同时被激发时,分子分别产生蓝光和绿色光,然后能量转移到DCM上,产生红光。DCM不能被光照射有效地激发。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
藤田静雄: "Structural Dependence and Dynamics of White Luminescence in Multilayer Structures for White Organic Light Emitting Devices"Materials Research Society Fall Meeting Proceedings (オンラインジャーナル). 708. BB.3.52 (2002)
Shizuo Fujita:“白色有机发光器件多层结构中白色发光的结构依赖性和动力学”材料研究学会秋季会议论文集(在线期刊)708。BB.3.52(2002)。
  • DOI:
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    0
  • 作者:
  • 通讯作者:
Shizuo Fujita, Ken-ichi Uesaka, Shigeo Fujita: "Structural Dependence and Dynamics of White Luminescence in Multilayer Structures for White Organic Light Emitting Devices"Materials Research Society Fall Meeting Proceedings. Vol. 708 BB3.52 on-line publica
Shizuo Fujita、Ken-ichi Uesaka、Shigeo Fujita:“白色有机发光器件多层结构中白色发光的结构依赖性和动力学”材料研究会秋季会议论文集。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
藤田静雄: "Structural Dependence and Dynamics of White Luminescence in Multilayer Structures for White Organic Light Emitting Devices"Materials Research Society Fall Meeting Proceedings. 708(オンラインジャーナル). BB.3.52 (2002)
Shizuo Fujita:“白色有机发光器件多层结构中白色发光的结构依赖性和动力学”材料研究学会秋季会议论文集 708(在线期刊)。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
藤田静雄: "Structural Dependence and Dynamics of White Luminescence in Multilayer Structures for White Organic Light Emitting Devices"Materials Research Society Fall Meeting Proceedings. (発表予定).
Shizuo Fujita:“白色有机发光器件多层结构中白色发光的结构依赖性和动力学”材料研究学会秋季会议论文集(待提交)。
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    0
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FUJITA Shigeo其他文献

FUJITA Shigeo的其他文献

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{{ truncateString('FUJITA Shigeo', 18)}}的其他基金

Basic Research for the Fabrication of Light Emitting Devices Utilizing Quantum Confined Exciton Molecules
利用量子约束激子分子制造发光器件的基础研究
  • 批准号:
    10305025
  • 财政年份:
    1998
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A).
Research for the Fabrication of Light Emitting Diodes with Ultra-high Efficiency
超高效率发光二极管的制作研究
  • 批准号:
    10355001
  • 财政年份:
    1998
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A).
Dynamics of Semiconductor Vapor Growth with Photocatalytic Surface Reactions
光催化表面反应的半导体气相生长动力学
  • 批准号:
    07405017
  • 财政年份:
    1995
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Development of blue-green semiconductor lasers by metalorganic vapor phase epitoxy
金属有机气相外延开发蓝绿光半导体激光器
  • 批准号:
    06555006
  • 财政年份:
    1994
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
Epitaxial Growth of Novel II-VI Semiconductor Alloys for Ultraviolet Optical Devices
用于紫外光学器件的新型 II-VI 半导体合金的外延生长
  • 批准号:
    05452097
  • 财政年份:
    1993
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Growth and properties of ZnCdSSe new alloy semiconductors for short wavelength laser applications
用于短波长激光应用的 ZnCdSSe 新型合金半导体的生长和性能
  • 批准号:
    02452147
  • 财政年份:
    1990
  • 资助金额:
    $ 5.38万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
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