Dissertation > Excellent graduate degree dissertation topics show

The Synthesis and Photo/Electro Luminisence Study of Iridium and Zinc Complexes with Oxazoline, Thiazoline and Schiff Base Ligands

Author: ZuoKai
Tutor: ZhuDongXia
School: Northeast Normal University
Course: Analytical Chemistry
Keywords: NPOLEDs multiple quantum well neutral Iridium(III) Complexes nondoped
CLC: O627
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
Read: Download Dissertation

Abstract


Currently, phosphorescent organic light-emitting diodes (PHOLEDs) continue to attract more and more intense interest, because they can approach a 100% internal quantum efficiency theoretically ,due to the best use of both singlet and triplet excitons. Of the various kinds of phosphorescent materials available, cyclometalated iridium(III) complexes exhibiting relatively high phosphorescent efficiencies along with easily modified to tune the emission color are certainly the most utilized phosphorescent emitter. Although many efforts have been carried out to produce electroluminescent (EL) materials and devices, high efficiency and long lifetime are still crucial factors for the application of EL materials. Among the challenges to achieve high-efficiency light are the optimum choice of emitter materials, tuning of charge carrier balance, adjusting the recombination zone, and mutual energy transfer. To tune the emission color over the entire visible range, the methodology of control in substituents of ligands were adopted, which adding diffculties of the molecular design and synthesis of difficulties.By changing different heteroatom substitution in the aromatic ring, can not only realize emitting light colors adjustable, and synthesis is relatively easy. In addition, more luminous nuclear can effectively impove the material luminous property.Organic quantum well structures are acknowledged to be helpful in enhancing the performance of OLEDs in the aspects of narrower spectral emission, higher emission efficiency, and tunable emission spectrum. Organic multiple-quantum-well (MQW) structures can effectively improve the luminous efficiency, which is more and more applied in the production of the device.Schiff base complexes have special R-C=N- groups, resulting in a widly use of application in luminescence. Salicylaldehyde schiff base complexes is one of the important category, which can form new complexes molecular structure with well luminous property. In addition, because of the simple synthesis and good luminous performance, Zinc complexes are also gotten more and more concern.In this investigation, we designed and synthesized Iridium complexes and Zinc complexes with oxazoline and thiazoline ligands respectively. Salicylaldehyde schiff base Iridium complexes with double luminous nuclear were also synthesized. Nondoped phosphorescent organic light-emitting devices (NPOLEDs) with multiple quantum well (MQW) structure was employed to study the properties of the Iridium complexes.The main content of this dissertation as follows: 1. Two Zinc complexes with oxazoline and thiazoline ring were synthesized. Blue OLED devices with Zinc complexes as emitting layer had good CIE.2. Two new iridium complexes with oxazoline and thiazoline ligands were synthesized. Using the two materials as the emitting layer of the nondoped phosphorescent organic light-emitting devices with multiple quantum well structure, we got green and white emission of the NPOLEDs with good performance.3. New salicylaldehyde schiff base iridium complexes with single and double luminous nuclear were synthesized. A white emission of the device based on the iridium complexes with single luminous nuclear was obtained, correspondly, we fabricated yellow-red device with methodology of spin coating organic doped layer, which using double luminous nuclear shiff base complex as dopant.

Related Dissertations

  1. External Electric Field Effect on Electronic and Optical Properties in InGaN/GaN Low Dimensional Systems,O471.1
  2. Study on InGaAsP/InP Muti-Quaunt-Wells Mode-Locked Laser and Its Ultra-Short Pulse,TN248.8
  3. Design and Research of Quantum Digital Signature Scheme,O413
  4. Research on Process and Application of Indium Doping Barrier Layers of InGaN/GaN MQWs,TN304.2
  5. New vertical external cavity surface-emitting laser,TN248
  6. Measurement and Analysis of the Photoluminescence of InGaN/GaN Quantum Wells,O471.1
  7. The Energytransfer in Highly Vibrationally Excited Cs2、RbCs Molecules,O561.3
  8. Study on Optical Properties of Low-dimensional Structures in Semiconductor,TN304
  9. Preparation and Characterization of ZnO Thin Films and ZnO/MgO Multi-quantum Wells,O484.1
  10. Structure Design and Characteristic of GaSb Substrate Multiple Quantum-well Laser Materials,TN244
  11. NMR Simulation of 3-qubit Grover Quantum Search Algorithm,O413
  12. The Transient Optical Nonliearity of Multiple-Quantum-Wells and Its Application in All-optical Switch,O437
  13. Design of Photonic Crystal Semiconductor Lasers and Study of Optical Properties of Multi-quantum Wells in Active Layers,TN248
  14. An Investigation on InGaAs/InAlAs Multiple Quantum Well Multi Mode Interference Optical Splitters/Couplers,TN256
  15. Growth and Characterization of Si and SiGe Epitaxial Films by UHV/CVD,TB383.2
  16. Study on the Distribution of Optical Vector-matrix Multiplier,TP38
  17. A Study on Optical Resonator Filters Based on Ⅲ-ⅤSemiconductor MQW Planar Waveguide,TN713
  18. Simulation of Magnetic Resonance Imaging Based on Intermolecular Multiple-quantum Coherences,O482.5
  19. Magnetic Resonance Imaging Simulations of Intermolecular Multiple-Quantum Coherences,O482.5
  20. Study on Irradiation Effects of GaAs/AlGaAs Multiple Quantum Wells,O474
  21. A Study on Multimode Interference Photonic Devices Based on Ⅲ-Ⅴ Semiconductor Multiple Quantum Wells,TN36

CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Elements in organic compounds
© 2012 www.DissertationTopic.Net  Mobile