Kwan Hyun Cho - Silver-based Ultrathin Transparent Top Electrode

Session 25: Emerging Capabilities

Silver-based Ultrathin Transparent Top Electrode for Organic Light Emitting Diodes
Thursday, June 22, 2017 
2:45 PM - 3:05 PM

Metal-based transparent electrodes are one of the important candidate materials for flexible transparent conductive electrodes. Due to the potential damage to underlying films, the fabrication process is a major issue for the transparent top electrode in organic optoelectronic devices. We investigated the damage-free, ultrathin, bulk-like, silver-based film by suppression of surface plasmon absorption. Using Al seed layer, high-quality transparent electrodes with transparent and sheet resistance have been obtained due to the suppression of surface plasmon absorption. We applied these silver-based films to the top cathode electrode for high transparent organic light emitting diodes (OLEDs). In addition, we demonstrated strong micorcavity effect using silver-based top cathode electrode. Top emission OLED using silver-based top electrode with strong micorcavity enhanced the power efficiency and current efficiency, compared to the conventional ITO based bottom emission OLED.


Speaker's Biography

Dr. Kwan Hyun Cho is a senior researcher in the Micro/Nano Scale Manufacturing R&D Group at Korea Institute of Industrial Technology (KITECH) in Korea. He received a B.S. degree in Electrical Engineering from Kyungpook National University, Korea, in 2005, and M.S. and Ph.D degrees in Electrical Engineering from KAIST, Korea, in 2078 and 2011, respectively. Prior to joining Korea Institute of Industrial Technology, he was a senior research engineer at Samsung Display from 2011 to 2013. His current research focuses on manipulating nanophotonic materials and structures to implement high-performance organic optoelectronic devices, including photovoltaics, displays, and printing process for hybrid electronics.


Kwan Hyun Cho
Korea Institute of Industrial Technology (KITECH)