2. Service life
Although enormous progress has been made in recent years, it seems that the aging of display devices, which results in a more or less rapid decrease in luminance at constant voltage, is helping to limit the expansion of the OLED market. Improving the lifetimes of EL diodes involves understanding the degradation mechanisms of materials and displays. Although the field is still controversial and few publications have appeared on the subject, a number of aging mechanisms now seem certain.
2.1 Identified causes of deterioration
The most obvious cause of degradation is short-circuiting. Short-circuiting can be explained by the fact that the active material, which is around 100 nanometers thick, is deposited on the relatively rough ITO anode. Depositing the cathode...
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Bibliography
Production
The OLED industry is now a reality. There are some twenty production sites worldwide belonging to
Pioneer, RiTDisplay, Samsung SDI, TDK, Sanyo/Kodak(AM), Teco, Univision, Ness for evaporated molecules and Delta Optronics, DuPont/RiT display, Osram for polymers.
Estimated at :
20 million passive matrix displays sold in 2003;...
Suppliers
(non-exhaustive list)
A distinction must be made between evaporated molecules and polymers.
Evaporated molecules
A number of evaporated molecules are included in classic fine chemicals catalogs (Aldrich, Lancaster, etc.).
Other molecules are sold specifically by certain companies, such as :
...
Standards
IEC 62008 Performance characteristics and calibration methods for digital data acquisition systems and appropriate software http://domino.iec.ch/preview/info_iec62008%7Bed1.0%7Db.pdf
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