Title page for etd-0621116-152728


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URN etd-0621116-152728
Author Chun-yu Chen
Author's Email Address No Public.
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Department Electro-Optical Engineering
Year 2015
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Enhanced conductivity of PEDOT: PSS electrode by dipping with formic acid for ITO-free organic light emitting diodes
Date of Defense 2016-07-11
Page Count 80
Keyword
  • Formic
  • PEDOT:PSS
  • Organic light emitting diode
  • Conductivity
  • Abstract (Flexible Organic Light Emitting Diode;FOLED) is a popular technology in display area. It has some advantages such as self-luminous, wide viewing angle, and flexible. Currently, the most widely used transparent electrode was indium tin oxide (ITO) in OLEDs. If we want to fabrication FOLED, ITO is unsuitable as the electrode in FOLEDs. So we use the polymer material such as PEDOT:PSS to replace ITO, but not higher conductivity than ITO ; thus, it is important to enhance conductivity of PEDOT:PSS.
    In this study, we enhance the conductivity of PEDOT:PSS for ITO-free organic light emitting diodes. The conductive PEDOT chains has having a hydrophobic and insulation PSS chains having a hydrophilic. The conductivity is poor of PEDOT:PSS, because the two chains has the Coulomb each other attraction, so the carrier has limitation to transport. We use the 20M formic acid to treat the PEDOT:PSS by dipping process, we found the conductive enhance from 0.3 (S/cm) to 1223 (S/cm) with proportion of PEDOT and PSS decrease. The film were investigated with UV-vis、AC-2、AFM, we use the XPS to analyze the proportion of PEDOT:PSS, and then use the RIE to treat the film that has the pattern. When the heat-treatment PEDOT:PSS anode device at the luminance of 1000 cd/m^2, the performance of the current efficiency are 13.40 cd/A , power efficiency are 4.98 lm/W and EQE are 6.68%.
    Advisory Committee
  • WEN-YAO HUANG - chair
  • Shun-Wei Liu - co-chair
  • Chih-Chien Lee - co-chair
  • Mei-Ying Chang - advisor
  • Files
  • etd-0621116-152728.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2016-07-21

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