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3 May 2012 Manufacturing polymer light emitting diode with high luminance efficiency by solution process
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Miyoung Kim, SongJin Jo, Ho Chang Yang, Dang Mo Yoon, Jae-Taek Kwon, Seung-Hyun Lee, Ju Hwan Choi, Bum-Joo Lee, and Jin-Koog Shin "Manufacturing polymer light emitting diode with high luminance efficiency by solution process", Proc. SPIE 8435, Organic Photonics V, 843521 (3 May 2012);

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