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- Title
Influence of the electric characteristics of II–VI semiconductor material on the electroluminescence of lanthanide complex.
- Authors
Zhang, F.-J.; Xu, Z.; Lv, Y.-G.; Zhang, J.-C.; Zhao, S. L.; Huang, J.-Z.; Wang, Y.; Yuan, G.-C.; Zhao, D.-W.; Xu, X.-R.
- Abstract
The organic-inorganic combined structural device (ITO/PVK:Eu/ZnS/Al) is fabricated based on layered optimization scheme. II–VI semiconductor material ZnS is acted as an electron function (transporting and acceleration) layer. The hot electrons which have been accelerated in the ZnS layer directly impact excitation europium ions through resonant energy transfer and then recombine with injected holes to form excitons in PVK or EuTTA2(N-HPA)Phen. Europium (Eu) ions may also be excited by intramolecular energy transfer from ligands. There are two kinds of excitation mechanisms: impacted excitation and injected recombination for the combined structural device. The electroluminescence (EL) intensity of the combined structural device is strongly improved and reaches up to 381 cd/m2 at 20 V compared with the pure organic structural device. It may be an effective method to improve the EL intensity of the lanthanide complex by using electric characteristics of inorganic semiconductor materials.
- Subjects
SEMICONDUCTORS; ELECTRONS; EUROPIUM; ELECTROLUMINESCENCE; RARE earth metals
- Publication
European Physical Journal B: Condensed Matter, 2006, Vol 52, Issue 2, p245
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2006-00290-x