Dissertation > Excellent graduate degree dissertation topics show

Theoretical and Experimental Study of Monolithic White Light LED Based on DBR

Author: JiangBo
Tutor: HuangLiRong
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Light Emitting Diode Metal Organic Chemical Vapor Deposition Quantum Well Distributed Bragg Reflector
CLC: TN312.8
Type: Master's thesis
Year: 2010
Downloads: 63
Quote: 0
Read: Download Dissertation

Abstract


White light emitting diode (LED) is considered to be the ideal light source of the next generation lighting because of its high brightness, long life, low energy-consuming, no pollution etc. Monolithic white LED was studied in both theory and experiment in this paper.In theory, based on the characteristics of multiple quantum well(MQW) white LED, the author first brought up with a new model of MQW light LED based on time domain models of MQW laser. Then the characteristics of white LED were numerically simulated using MATLAB programming. Theoretical investigation of LED design was made in many factors (such as injection current, well number and arrangement, etc.) and the properties of white LED were optimized. This simulated results were testified in subsequent experiments.In experiments, the reflectivity of distributed Bragg reflector(DBR) was simulated. Then a series of AlGaN/GaN DBRs were grown by metal organic chemical vapor deposition (MOCVD) .After the optimization of growth parameters of AlGaN/GaN DBR, green LED and white LED based on AlGaN/GaN diffraction Bragg reflector (DBR) were fabricated, respectively. The results showed that the optical power at longer emission wavelength was increased, which improved the performance of the white LED with the help of the DBR.

Related Dissertations

  1. Research and Application of Single-Stage Multi-Product Batch Scheduling Based on Quantum Genetic Algorithm,TP18
  2. Quantum Genetic Algorithm and Its Application in the Scheduling Problem,TP18
  3. Research on DNA Encoding Based on Quantum Computing,Q75
  4. Distributed Generation Optimal Allocation and Distribution Network Reconfiguration,TM744
  5. The improved intelligent algorithm - based electric locomotive traction transformer fault diagnosis technology research,U269.6
  6. Silanol reaction quantum chemical calculations,O643.12
  7. Effects of Light Control on Tissue Culture and Photosynthesis Characterristics of Anthurium Andraeanum Lind,S682.14
  8. Aqueous Synthesis and Property Studies of Citrate-stabilized CdS Quantum Dots,O614.242
  9. Synthesis and Characterization of Water-soluble Prophyrins with Peptide Dendrimers,TQ252
  10. Oxidation Polymerization and Optical Properties of Polymer Light-Emitting Materials,O631.3
  11. Study on Optimization Modeling and Intelligent Control of Alcohol-based Fuel Boiler Combustion System,TK223.2
  12. Research of QGA on the Mechanical Optimization Problems,TP18
  13. Silylene into the reaction in the three-dimensional electronic effects,O627.41
  14. Research on Intelligent Optimization Algorithm and Its Application in Communication,TN92
  15. Quantum chemical calculations study of the alkoxy silane and a silicon oxide reduction system,O627.41
  16. Microwave radiation method for the preparation of functional nanoparticles,TB383.1
  17. Synthesis of Various PbS Nanostructures by Pulsed Laser Ablation in Liquids,TB383.1
  18. Synthesis and Characterization of Fluorescent Magnetic Nanoparticles,TB383.1
  19. Synthesis of Dissymmetric Bis-quaternary Ammonium with Imidazoline Ring and Study on Inhibitory Performance,TG174.42
  20. Electrochemical corrosion inhibitor for carbon steel corrosion resistance role in the acidic medium,TG174.42
  21. The Study on Adsorption Properties of Denitrification by CuO/γ-Al2O3 Catalysts,X701.2

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Semiconductor technology > Semiconductor diode > Diodes: structure and performance > Light-emitting diodes
© 2012 www.DissertationTopic.Net  Mobile