Title :
Injection and transport of carriers at organic interfaces in organic light-emitting-diode with oxadiazole derivatives
Author :
Imaizumi, K. ; Mori, T. ; Mizutani, T.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
The electrical and optical properties of the OLED with a structure of ITO/HTM/OXD-7/Alq3/Al have been investigated. The currents of the OLEDs with various HTM materials can be explained by the barrier heights of hole injection and hole mobilities of HTM. The OLED with MDPTA has a high performance for a blue-light-emitting EL device. Its EL is associated with the exciplexes formed with MDTPA and OXD-7 molecules. In the TL device, the introduction of Alq3 layer between OXD-7 and Al cathode caused not only the increase of current, but also the enhancement of EL efficiency. These results can be explained with the tunnel injection model
Keywords :
excimers; hole mobility; light emitting diodes; organic compounds; HTM; ITO/HTM/OXD-7/Alq3/Al; MDPTA; OLED; OXD-7; TL device; barrier height; blue EL device; carrier injection; carrier transport; efficiency; electrical properties; exciplex; hole injection; hole mobility; optical properties; organic interface; organic light-emitting-diode; oxadiazole derivative; tunnel injection model; Anodes; Cathodes; Chemicals; Current density; Dielectric devices; Dielectrics and electrical insulation; Indium tin oxide; Low voltage; Optical materials; Organic light emitting diodes;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.641111
