高效的绿色有机发光二极管含有发光三坐标铜 (I) 复合体
Masashi Hashimoto1, Satoshi Igawa, Masataka Yashima
1Luminescent Materials Laboratory, RIKEN (The Institute of Physical & Chemical Research), Hirosawa 2-1, Wako-Shi 351-0198, Japan.
Journal of the American Chemical Society
|May 20, 2011
概括
新的铜(I) 复合体显示有机发光二极管 (OLED) 的高光发光. 这些材料在原型OLED设备中显示出高效和明亮的绿色光辐射的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 光物理学的光学物理学
背景情况:
- 有机发光二极管 (OLED) 对于现代显示和照明技术至关重要.
- 开发具有高效率和稳定的新型排放材料是一个正在进行的研究领域.
- 三坐标铜 (I) 复合体具有作为传统光发射器的成本效益高的替代品的潜力.
研究的目的:
- 合成和表征具有特定素联结体的新型三坐标铜 (I) 复合物.
- 为了研究这些复合物在溶液和固态中的光发光特性.
- 评估这些复杂物作为原型OLED设备中的排放材料的性能.
主要方法:
- 三坐标铜 (I) 复合物的合成: (dtpb) Cu (I) X,其中 X = Cl (1), Br (2), I (3) 和 dtpb = 1,2-bis (o-ditolylphosphino) .
- 在脱气二甲溶液和无形薄膜中测量光发光度,以确定量子产量 (Φ) 和寿命 (τ).
- 制造和测试传统的OLED设备,在发射层中结合合成的铜 (I) 复合物.
主要成果:
- 合成的铜 (I) 复合物 (1-3) 显示出出色的光发光性能.
- 观察到高量子产量 (Φ = 0.43-0.60在溶液中, Φ = 0.57-0.71在薄膜中) 和合适的寿命 (τ = 4.9-6.5μs在溶液中, τ = 3.2-6.1μs在薄膜中).
- 使用复合体2的OLED实现了明亮的绿色发光,电流效率为65.3cd/A,最大外部量子效率为21.3%.
结论:
- 合成的三坐标铜 (I) 复合物是高度排放的材料.
- 这些复合物显示出在高效的有机发光二极管中应用的巨大希望.
- 结果突出了铜 (I) 复合体作为先进光电子设备的可行发射器的潜力.
更多相关视频
06:08Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
06:25Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter
Published on: November 7, 2025
相关概念视频
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
01:23Photoluminescence: Fluorescence and Phosphorescence
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
00:56Extraction: Advanced Methods
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...