TITLE:
Reduction of the Optical Loss in the Multi-Cathode Structure Organic Light Emitting Device Using a Long Range Surface Plasmon
AUTHORS:
Akiyoshi Mikami
KEYWORDS:
Light-Emitting Device, Organic Material, Surface Plasmon, Optical Simulation
JOURNAL NAME:
Optics and Photonics Journal,
Vol.6 No.8B,
August
30,
2016
ABSTRACT: Light extraction efficiency of organic light-emitting devices has improved by using a nano-sized multi-cathode structure consisting of semi-transparent metal and an optical compensation layer. From the detail optical calculation based on the multi-scale analysis including near-field optics, it was found that surface plasmon loss in the metal cathode is suppressed to less than 10% due to long range and short range surface plasmon coupling between both sides of metal cathode. Not less than 90% of optical power in the dipole emission can be successfully utilized as propagation light. Light extraction efficiency in a phosphorescent device has improved about twice by using the multi-cathode structure.