ENERGY-BAND SCHEMES OF HIGHLY STABLE ORGANIC ELECTROLUMINESCENT DEVICES

Citation
T. Sano et al., ENERGY-BAND SCHEMES OF HIGHLY STABLE ORGANIC ELECTROLUMINESCENT DEVICES, IEEE journal of selected topics in quantum electronics, 4(1), 1998, pp. 34-39
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering, Eletrical & Electronic",Optics
ISSN journal
1077-260X
Volume
4
Issue
1
Year of publication
1998
Pages
34 - 39
Database
ISI
SICI code
1077-260X(1998)4:1<34:ESOHSO>2.0.ZU;2-W
Abstract
Host-guest systems in organic electroluminescent (EL) devices have bee n studied. Organic EL cells doped with blue to red guest emitters were prepared and their characteristics and the energy bands of the materi als were measured. A green EL cell doped with 2,3-quinacridone showed a maximum efficiency of 18.1 Im/W. A yellow EL cell doped with 5,6,11, 12-tetraphenylnaphthacene (rubrene) showed a maximum efficiency of 14. 4 Im/W and a half-decay time of 25000 h from 130 cd/m(2), The energy-b and schemes of those cells were analyzed and requirements for the sche me and a guest emitter are discussed.