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Proceedings Paper

Manufacturing polymer light emitting diode with high luminance efficiency by solution process
Author(s): Miyoung Kim; SongJin Jo; Ho Chang Yang; Dang Mo Yoon; Jae-Taek Kwon; Seung-Hyun Lee; Ju Hwan Choi; Bum-Joo Lee; Jin-Koog Shin
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Paper Abstract

While investigating polymer light emitting diodes (polymer-LEDs) fabricated by solution process, surface roughness influences electro-optical (E-O) characteristics. We expect that E-O characteristics such as luminance and power efficiency related to surface roughness and layer thickness of emitting layer with poly-9-Vinylcarbazole. In this study, we fabricated polymer organic light emitting diodes by solution process which guarantees easy, eco-friendly and low cost manufacturing for flexible display applications. In order to obtain high luminescence efficiency, E-O characteristics of these devices by varying parameters for printing process have been investigated. Therefore, we optimized process condition for polymer-LEDs by adjusting annealing temperatures of emission, thickness of emission layer showing efficiency (10.8 cd/A) at 10 mA/cm2. We also checked wavelength dependent electroluminescence spectrum in order to find the correlation between the variation of efficiency and the thickness of the layer.

Paper Details

Date Published: 4 May 2012
PDF: 7 pages
Proc. SPIE 8435, Organic Photonics V, 843521 (4 May 2012); doi: 10.1117/12.922489
Show Author Affiliations
Miyoung Kim, Korea Electronics Technology Institute (Korea, Republic of)
SongJin Jo, Korea Electronics Technology Institute (Korea, Republic of)
Ho Chang Yang, Korea Electronics Technology Institute (Korea, Republic of)
Dang Mo Yoon, Korea Electronics Technology Institute (Korea, Republic of)
Jae-Taek Kwon, Korea Electronics Technology Institute (Korea, Republic of)
Seung-Hyun Lee, Korea Electronics Technology Institute (Korea, Republic of)
Ju Hwan Choi, Korea Electronics Technology Institute (Korea, Republic of)
Bum-Joo Lee, Korea Electronics Technology Institute (Korea, Republic of)
Jin-Koog Shin, Korea Electronics Technology Institute (Korea, Republic of)


Published in SPIE Proceedings Vol. 8435:
Organic Photonics V
Barry P. Rand; Chihaya Adachi; Volker van Elsbergen, Editor(s)

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