Title page for etd-0621114-141827


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URN etd-0621114-141827
Author Shr-Yang Yan
Author's Email Address No Public.
Statistics This thesis had been viewed 5356 times. Download 545 times.
Department Electro-Optical Engineering
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Discussion of the Energy Transfer Paths in Deep Blue Organic Light Emitting Diodes
Date of Defense 2014-07-07
Page Count 76
Keyword
  • Dexter energy transfer
  • OLED
  • energy transfer
  • Anthracene derivatives
  • Carbazole derivatives
  • Abstract Deep blue light material which is from laboratory designed and synthesized were studies. Using process and Host-Guest system for individual dopant concentration to discuss how energy transfer and the effects of doping concentration with Forster energy transfer and Dexter. The host material is Carbazole derivatives, and the guest material is Anthracene derivatives. We use two processes what is physical doping and chemical bonding to discuss:(1)To make the OLED by co-evaporation methods. Owing to physical way will make host and guest material have larger distances, and more energy will be transferred by Forster energy transfer mechanism, thus further seminar the characteristics of physical dopant.(2)To make the PLED by using spin coating method. The polymer material has chemical bonding characteristics therefore shows reduce distance between the dipole-dipole interaction, and produce Dexter energy-transfer. We conclude that chemical bonding affects device. Through two diverse processes extending two different mechanisms of energy transfer, and adjust doping concentration to optimization. The work shows that the Dexter energy-transfer, polymer material of chemical bonding will increase the probability of energy transfer that can be effectively transfer to Host-Guest system. Thus far we discover changing the guest doping concentration of polymer(Host:Guest=X:Y;X+Y=100) specifically at 50%, 25%, 20%, 15% and5% compared P0, P1, P2, P3 and P4 has distinct result. In this study we’ve found that making OLED by co-evaporation methods displays the concentration quench effect. According to former the best guest doping concentration is 20%. The other hand we do not discover the concentration quench yet in the PLED, because especially designed the molecular structure of the polymer material uses the C-F bond and Carbazole to increase steric hindrance of the polymer chain so among of the molecule is not easy to stack to produce quench effect. At 50% doping concentration of sample P0 has the best luminous intensity. Base on above-experimented, we conclude the device of organic deep blue light material in chemical bonding is better than physical doping, and the energy transfer is also better.
    Advisory Committee
  • Mei-Ying Chang - chair
  • KO-Shan HO - co-chair
  • Li-Yin Chen - co-chair
  • Wen-yao Huang - advisor
  • Files
  • etd-0621114-141827.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2014-07-22

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