Double-layer electroluminescent devices with Langmuir-Blodgett films of amphiphilic 8-hydroxyquinoline lanthanum as emitter

Authors
Ouyang, JM Ling, WH Yang, CH Li, YF Yu, G
Citation
Jm. Ouyang et al., Double-layer electroluminescent devices with Langmuir-Blodgett films of amphiphilic 8-hydroxyquinoline lanthanum as emitter, MAT SCI E B, 85(2-3), 2001, pp. 247-250
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
ISSN journal
09215107 → ACNP
Volume
85
Issue
2-3
Year of publication
2001
Pages
247 - 250
Database
ISI
SICI code
0921-5107(20010822)85:2-3<247:DEDWLF>2.0.ZU;2-O
Abstract
A double-layer organic thin film electroluminescent (EL) device has been pr epared by using the LB film technique. Its basic structure consists of a ho le-transport layer of material, poly (N-vinylcarbazole) (PVK) and an electr on-transport layer of material, the Langmuir-Blodgett films of bis [N-hexad ecyl-8-hydroxy-2-quinolinecarboxamide] lanthanum (LaL2Cl). Comparing with t he luminance of the single-layer EL device (ITO/LB film/Al), the double-lay er EL device (ITO/PVK/LB film/Al) has a higher luminance (873 cd m(-2)) and operates at a lower driving voltage (8 V). The deposited surface pressure of the LB film had strong influence on the EL intensity of the devices. The luminancent mechanism of the EL devices was discussed. (C) 2001 Elsevier S cience B.V. All rights reserved.