Manufacturing polymer light emitting diode with high luminance efficiency by solution process

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

doi:10.1117/12.922489

3 May 2012 Manufacturing polymer light emitting diode with high luminance efficiency by solution process

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

Author Affiliations +

Proceedings Volume 8435, Organic Photonics V; 843521 (2012) https://doi.org/10.1117/12.922489
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

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.

Citation Download Citation

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); https://doi.org/10.1117/12.922489

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