Title page for etd-0628112-130754


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URN etd-0628112-130754
Author Tung-Lin Chuang
Author's Email Address kingclys@hotmail.com
Statistics This thesis had been viewed 5579 times. Download 837 times.
Department Electro-Optical Engineering
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title ITO distributed Bragg reflectors for resonant cavity OLED
Date of Defense 2012-06-26
Page Count 60
Keyword
  • resonant cavity
  • organic light emitting diodes
  • Indium tin oxide
  • porous
  • supercritical CO2
  • distributed Bragg reflectors
  • Abstract In the study, conductive distributed Bragg reflectors (DBRs) fabricated at room temperature based on porous indium tin oxide (ITO) on dense ITO bilayers were proposed for resonant cavity organic light emitting diodes (RCOLEDs). In the fabrication of the ITO DBRs, the low refractive index porous ITO films were obtained by applying supercritical CO2 treatment at different temperature and pressures on the spin-coated sol-gel ITO films. On the other hand, the high refractive index ITO films were grown at room temperature by long-throw reactive ratio-frequency magnetron sputtering. The refractive index of the porous ITO film and ITO films were 1.54 and 2.0, respectively. For the DBR with 4 pairs ITO bilayers, the optical reflectance of more than 70 % was achieved. The stop band and the average resistivity is 140 nm and 2.2×10-3 Ω-cm, respectively. Finally, electrical and optical characteristics of the RCOLEDs fabricated on the ITO DBR were investigated and compared with those of the conventional OLEDs. The maximum luminous efficiency of 3.79 cd/A was obtained at 347 mA/cm2 for the RCOLED. This luminous efficiency was 26 % higher than that of the conventional OLED.
    Advisory Committee
  • Ting-Chang Chuang - chair
  • Yi-Jen Chiu - co-chair
  • Wen-Yao Huang - co-chair
  • Ann-Kuo Chu - advisor
  • Files
  • etd-0628112-130754.pdf
  • Indicate in-campus at 3 year and off-campus access at 5 year.
    Date of Submission 2012-06-28

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