Related Experiment Video
Updated: Jun 27, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
High-efficiency white organic light-emitting diodes using blue and red phosphorescent materials with exciton blocking
Jung Hyun Park1, Ji Hoon Seo, Ji Hyun Seo
1Department of Information Display, Hongik University, Seoul, 121-791, Korea.
Abstract:
High-efficiency white organic light-emitting diodes (WOLEDs) were fabricated with two emissive layers and an exciton blocking layer (EBL) was sandwiched between two phosphorescent dyes, bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium III (Flrpic) as the blue emission and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2') acetylacetonate ((acppy)2Ir(acac)) as the red emission. This EBL effectively prevented a triple-triple energy transfer between the two phosphorescent emissive layers with blue and red emission. The white device showed Commission Internationale De L'Eclairage (CIE(x, y)) coordinates of (0.33, 0.42) at 22400 cd/m2, a maximum luminance of 27300 cd/m2 at 13.2 V, and a maximum luminous efficiency of 26.9 cd/A.
More Related Videos
Related Concept Videos
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Photoluminescence: Applications
Variables Affecting Phosphorescence and Fluorescence

