Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates

Abstract Highly efficient and stable single‐stack hybrid white organic light‐emitting diode (WOLED) devices are developed using two emissive layers: one with amber‐colored phosphorescent molecular‐aggregate emission from the Pd(II) complex, Pd(II) 7‐(3‐(pyridine‐2‐yl‐κN)phenoxy‐κC)(benzo‐κC)([ c ]be...

Full description

Saved in:
Bibliographic Details
Published in:Advanced materials (Weinheim) 2023-01, Vol.35 (11)
Main Authors: Ameri, Lydia, Cao, Linyu, Tan, Xinqiang, Li, Jian
Format: Article
Language:English
Subjects:
Chemistry
color stability
fluorescence
MATERIALS SCIENCE
molecular-aggregates
operational stability
phosphorescence
Physics
Science & Technology - Other Topics
White OLED
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Highly efficient and stable single‐stack hybrid white organic light‐emitting diode (WOLED) devices are developed using two emissive layers: one with amber‐colored phosphorescent molecular‐aggregate emission from the Pd(II) complex, Pd(II) 7‐(3‐(pyridine‐2‐yl‐κN)phenoxy‐κC)(benzo‐κC)([ c ]benzo[4,5]imidazo‐κN)[1,2‐ a ][1,5]naphthyridine, Pd3O8‐Py5, and the other with blue fluorescence emission. An optimized device structure achieves high color stability under various current densities, an external quantum efficiency (EQE) of 45.5%, a power efficiency of 97.4 Lm W −1 , and an estimated LT 95 (operational time to 95% of the initial luminance) of 50 744 h at an initial luminance of 1000 cd m −2 .
ISSN:0935-9648