Analyses of the light extraction efficiency of organic light-emitting diodes with ITO/mesh-Ag/ITO anode and its optical transmittance as transparent electrode
- Authors
- Kim, Kirak; Cho, Eou-Sik; Kwon, Sang Jik
- Issue Date
- Dec-2021
- Publisher
- IOP Publishing Ltd
- Keywords
- OLED; Extraction Ratio; ITO; Mesh-Ag; ITO anode; Full-wave simulation; 3D FDTD method
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.60, no.12
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 60
- Number
- 12
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/82895
- DOI
- 10.35848/1347-4065/ac34d3
- ISSN
- 0021-4922
- Abstract
- We have used the three-dimensional finite-difference time-domain simulation method to analyze the out-coupling efficiency of organic light-emitting diodes (OLEDs) with an ITO/Mesh-Ag/ITO anode. The period and grid space of the meshed Ag structure effectively affected the extraction ratio (ER) of the bottom-emitting OLED. The 3D simulation results for a simple structure of OLED with an ITO/Mesh-Ag/ITO anode showed the ER of about 26.4% and it enhanced 2.26 times that of the continuous Ag layer of about 11.7%. In addition, in respect to the transparent electrode of the OLED using the ITO/Mesh-Ag/ITO multiple layers, the Ag thickness and open ratio were important factors that affected the transmittance and the electrical conductance. The open ratio of 60% resulted in sheet resistance of less than 25 omega/, while keeping the transmittance nearly similar to that in the case of a single ITO layer.
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