Development of Long Lifetime and High Performance Organic Light Emitting Diode Display with Wide Temperature Range

A long lifetime organic light emitting diode (OLED) display at high temperature was developed with optimization of each layer organic materials. We clarified that charge-carrier balance between hole and electron inside the emission layer (EML) affects the lifetime of OLEDs, especially for blue-OLED....

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Bibliographic Details
Published in:Journal of Photopolymer Science and Technology 2020/07/01, Vol.33(4), pp.387-392
Main Authors: Mizusaki, Masanobu, Shibasaki, Masakazu, Tsukamoto, Yuto, Umeda, Tokiyoshi, Tsuchiya, Hiroshi, Shimada, Shinji
Format: Article
Language:English
Subjects:
Automotive application
Current carriers
High temperature
High temperature driving
Lifetime
Optimization
Organic light emitting diode display
Organic light emitting diodes
Organic materials
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Summary:A long lifetime organic light emitting diode (OLED) display at high temperature was developed with optimization of each layer organic materials. We clarified that charge-carrier balance between hole and electron inside the emission layer (EML) affects the lifetime of OLEDs, especially for blue-OLED. We also clarified that the lifetime becomes long with increasing the density of hole in the EML. The lifetimes of the blue-, green, and red-OLEDs developed in this study were achieved over 1,000 hours at 85 ℃ under a driving of 600 cd/m2 white luminance. A prototype 12.3 inch flexible OLED display was fabricated with using the new electron-blocking layer, hole-blocking layer, and hole-transport layer materials. We believe that the OLED display that we developed would be useful for automotive application.
ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.33.387