Dissertation > Excellent graduate degree dissertation topics show

Synthesis and Optical-electrical Properties of New Organic Electroluminescent Materials and Devices

Author: MaXiaoFen
Tutor: YinShouGen;LuYan
School: Tianjin University of Technology
Course: Condensed Matter Physics
Keywords: OLED phenothiazine fluorene thiophene Witting reaction soluble single-walled nanotube
CLC: TN304.05
Type: Master's thesis
Year: 2007
Downloads: 346
Quote: 0
Read: Download Dissertation

Abstract


Since C. W. Tang reported low-voltage driven high-luminance OED for first time in 1987. Organic light-emitting devices (OLED) becomes the international cutting-edge project and the focus of international competition which need the cooperation and research of many intercrossed branch of science.In order to have better performance, it is essential to develop novel structural polymeric materials with balanced transport of both injected electrons and holes. By changing or modifying the structures of organic semiconductor materials can easily adjust the energy level and charge transporation. The dissertation is divided into five chapters.1. Two novel copolymers composed of fluorene and phenothiazine derivates were synthesized by Wittig reaction. Copolymers of thiophene-co-phenothiazine were prepared by Wittig reaction.The photo-physical, electroluminescence and electrochemical properties of the resulting polymers were analyzed by UV-vis, PL , EL and EC.2. Single layer structure devices with the configuration of ITO/Polymers/Ca/Al were fabricated. The peak value of EL for P1, P2 was 552 nm and 544 nm,respectively. The CV results demonstrated that introduction of phenothiazine moiety into polyfluorenes can enhance electron affinity (Ea) and lower the ionic potential (Ip). EL results revealed that all these two copolymers emit green light with the maximum brightness of 20 cd/m2(16 V)and 12.5 cd/m2(15 V), respectively. The device of P3 with a single layer structure of ITO/Polymer/Ca/Al emits red light with the maximum brightness of 50 cd/m2(17V).3. Preparation of soluble SWNTs(s-SWNTs). SWNTs were purified and cutted, and then reacted with cetylamine(HAD).The resulting s-SWNTs was obtained and characterized by SEM, Raman and FTIR.4. The effect of s-SWNTs properties on the double layers polymer light emitting devices(PLED) were studied. Using s-SWNTs/host polymer composite as hole transport layer,double layer structure devices with the configuration of ITO/PVK: s-SWNTs/Zn(BTZ)2/Mg:Ag/Ag were fabricated. Influence of s-SWNTs on the injection and transport of hole of PLED was studied in detail.5. Novel phosphorescent material Ir(Ⅲ) complexes based on phenothiazine was prepared. And according to the literature, a reasonable explanation was proposed for the target compound.

Related Dissertations

  1. Study on the Chimisorption Removal of FCC Gasoline Sulfur Compound,TE624.55
  2. Curing Mechanism and Properties of Fluorenyl Epoxy Resin,TQ323.5
  3. Study of Cyclodextrin-induced Non-deoxygenated Room Temperature Phosphorescence of Fluorene and Aminofluorene,O657.3
  4. Spectra and Electrochemical Behavior with Analytical Application of Three Herocyclic Bis-Schiff Bases,O626
  5. Aza polydentate metal Complexes,O627
  6. Synthesis and Anti-tumor Activities of N’-benzylidene-2-(4-oxothieno [2,3-d] Pyrimidin-3 (4H)-yl) Acetohydrazone Derivatives,R96
  7. OLED graphical interface and button design,TP368.1
  8. Micro OLED display control technology,TN873.3
  9. Study on Adsorption Properties of Thiophene on Mesoporous Carbon with Metallic Ions,X701.3
  10. The Preparation and Characterization of Conducting Polymers with Electromagnetic Function,TB383.1
  11. Removal of Thiophene and Mercaptan by β-cyclodextrin and Hydrotalcites,TE624.55
  12. The Comparison of Liver Regenerative Capacity between the Female and Male Mice,R-332
  13. Ways to improve the luminous efficiency of organic materials,TB322
  14. Study on the Synthesis of n-Butyl Flufenamate and 10-(3-chloropropyl)-2-(trifluoromethyl)phenothiazine,O626.12
  15. Synthesis and Properties of Conjugated Electroluminescent Materials,O621.3
  16. Study on the Ziegler-Natta Catalyst for 1-Butene Polymerization,TQ325.14
  17. Improved Synthesis Technology and Synthetic Study of the Red Dopant DCJTB and the Green Dopant Alq3 for OLED Applications,TB34
  18. The Synthesis of Fluorene-based Polymer Containing Ethoxy and Optical Characterization,O631.3
  19. Synthesis and Study on the Photovoltaic Properties of Polymeric Metal Complexes Containing Fluorene and 8-Hydroxyquinoline,O631.3
  20. Synthesis and Properties Investigation of Fluorene-Based Bluelight-Emitting Materials,O631.3
  21. Design and Study on the Photovoltaic Properties of D-π-A Type Polymeric Metal Complexe Dyes,TM914.4

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Semiconductor technology > Light-emitting devices >
© 2012 www.DissertationTopic.Net  Mobile