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Study on Photoelectric Properties of Novel Rare Earth Complexes in Doped Systems

Author: WangYong
Tutor: XuXu
School: Beijing Jiaotong University
Course: Condensed Matter Physics
Keywords: The organic electroluminescent Rare earth complexes Electroluminescent exciplex Multi - doping system White
CLC: O482.31
Type: Master's thesis
Year: 2007
Downloads: 154
Quote: 0
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Abstract


Organic rare earth complex organic electroluminescent materials have good luminous monochrome, color-rich, high internal quantum efficiency advantages, the lanthanide complexes electric current electroluminescent devices (EL) but the prevalence of poor stability, low efficiency and aging fast shortcomings, improve device electroluminescent performance mainly two types: synthetic performance better new materials and improve the structure and performance of the device. In this paper, we from a new europium, terbium-doped rare earth complexes Tb 0.5 of Eu 0.5 (TTA) 3 Dipy start to study the light emitting device based on the different structure of lanthanide complexes electrically induced luminescence characteristics. In addition, we take advantage of multi-doping system based on rare earth complexes, prepared white light-emitting devices, the details are as follows: 1 europium, terbium co-doped rare earth complexes Tb 0.5 of Eu 0.5 (TTA) 3 Synthesis and Characterization of Dipy synthesis Tb 0.5 Eu 0.5 (TTA) 3 Dipy test their optical luminescence spectroscopy to study the impact the Tb3 introduction of organic ligand to Eu3 energy transfer. Its mixed in different proportions with the matrix material of PVK, tested in different proportions under photoluminescence intensity, and analyzes the doped systems, the energy transfer process. 2 electroluminescent devices Preparation and study of rare earth complexes with PVK doped system was prepared for the light-emitting layer of ITO / PVK: Tb 0.5 Eu 0.5 (TTA) 3 Dipy / PBD / Al structure of the electroluminescent device, induced by electrical measurement of the emission spectrum, and analysis of the mechanism of the electroluminescent. And by changing the PVK and Tb 0.5 of Eu 0.5 (TTA) 3 Dipy between doping ratio monochromatic better The electroluminescent device. 3 rare earth complex organic electroluminescent of emission electroplex luminescence properties in ITO / PVK: Tb 0.5 of Eu 0.5 (TTA) 3 Dipy / BCP / Alq3/Al for the structure of the electroluminescent device, the discovery of the emergence of a new emission peak (490 nm), the change to a different device structure, proved that the new emission peak from the BCP and rare earth complex ligands formed between the electrostrictive exciplex emission. Over four white light-emitting devices doped systems were prepared by a multi-doping system PVK: Eu (aspirin) 3phen: Alq3 emitting layer structure ITO / PVK: Eu (aspirin) 3phen: Alq 3 / BCP / Alq 3 / Al light-emitting devices. Analysis of the mechanism of energy transfer between the blend system, and by changing the ratio between them, the PVK and Alq3, the mass ratio of 10:1, to give a better white light, the device at a voltage of 16V, color coordinate, (0.30,0.31), brightness of 150cd / m 2 , and stabilized.

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Solid nature of the > Optical Properties > Luminescence
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