Title :
The effect of electrode materials on the carrier injection into the organic Alq3-TPD electroluminescence (EL) device
Author_Institution :
Dept. of Electr. & Electron. Eng., Shinshu Univ., Nagano, Japan
Abstract :
The organic electroluminescence (EL) device composed of 8-hydroxy-quinoline aluminum (Alq3) and N,N´-diphenyl-N,N´-bis-(3-methylphenylene) 1,1´-diphenyl-4,4´ diamine (TPD) has been fabricated by vacuum evaporation. A strong dependence of the current on the electric field exists. The carrier injection operative in the Alq3-TPD EL device has been explained by the theory of Fowler-Nordheim tunneling. The weak temperature dependence has been attributed to the drift of carriers by thermally activated hopping through localized states
Keywords :
electroluminescent devices; hopping conduction; interface states; light emitting diodes; organic compounds; organic semiconductors; semiconductor thin films; tunnelling; vacuum deposited coatings; 8-hydroxy-quinoline aluminum; EL device; Fowler-Nordheim tunneling; N,N´-diphenyl-N,N´-bis-(3-methylphenylene) 1,1´-diphenyl-4,4´ diamine; carrier drift; carrier injection; electric field; electrode materials; localized states; organic Alq3-TPD electroluminescence device; thermally activated hopping; vacuum evaporation; weak temperature dependence; Breakdown voltage; Cathodes; Current measurement; Electrodes; Glass; Organic materials; Pulse amplifiers; Pulse measurements; Semiconductor materials; Substrates;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.522963
