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Journal Article
Highly Conductive and Transparent Thin Metal Layer for Reducing Microcavity Effect in Top-emitting White Organic Light-emitting Diode
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- Authors
- Hyunsu Cho, Chul Woong Joo, Sukyung Choi, Chan-mo Kang, Byoung-Hwa Kwon, Jin-Wook Shin, Kukjoo Kim, Dae-Hyun Ahn, Nam Sung Cho, Gi Heon Kim
- Issue Date
- 2022-07
- Citation
- Organic Electronics, v.106, pp.1-7
- ISSN
- 1566-1199
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- The optical and electrical properties of the top electrode are crucial for the structural design of top-emitting organic light-emitting diodes (OLEDs). A uniform metal layer, if obtainable, can be electrically excellent and optically well-tuned. In this study, Ag deposited with Mg at a concentration of 9:1 to form a metal thin film exhibits higher conductivity and higher transmittance than those of a neat Ag thin film within a thickness of 10 nm or less. In addition, the thin Mg:LiF (1:1) layer renders the Mg:Ag metal film more uniform and enhances its electron injection property. If a Mg:LiF/Mg:Ag thin film is applied to top-emitting white OLEDs, the driving voltage is lowered and the efficiency is improved. In addition, color shifts for viewing angles are reduced, and the emission characteristics are close to Lambertian.