Title :
Life time issues in organic light emitting diodes
Author :
Choudhary, Sudhanshu ; Qureshi, S.
Author_Institution :
Indian Inst. of Technol., Kanpur
Abstract :
This paper presents different factors that affect the life time of OLEDs. Phosphorent OLEDs were found to exhibit longer lifetime by utilizing triplet states along with the singlets. Interface conditioning and mixed host with double emission layers have been found to improve the life time by preventing the degradation of the interfaces due to electrochemical reactions. Hence charge balance and exciton confinement were found important. Multiline addressing scheme (MAS) for passive matrix OLED displays was also studied and it was found that, minimizing the amplitude of the electrical current flowing through the diodes has a direct impact on the lifetime.
Keywords :
LED displays; carrier lifetime; electrochemical analysis; organic light emitting diodes; phosphorescence; electrochemical reactions; interface conditioning; multiline addressing scheme; organic light emitting diodes; passive matrix OLED displays; phosphorent OLED life time improvement; Active matrix organic light emitting diodes; Charge carrier processes; Excitons; Flat panel displays; Helium; Organic light emitting diodes; Paper technology; Phosphorescence; Stability; Thermal degradation; OLEDs; charge balance; exciton confinement; singlet; triplets;
Conference_Titel :
TENCON 2008 - 2008 IEEE Region 10 Conference
Conference_Location :
Hyderabad
Print_ISBN :
978-1-4244-2408-5
Electronic_ISBN :
978-1-4244-2409-2
DOI :
10.1109/TENCON.2008.4766504
