IMPROVED STABILITY OF MOLECULAR ORGANIC EL DEVICES

Citation
H. Fujii et al., IMPROVED STABILITY OF MOLECULAR ORGANIC EL DEVICES, Macromolecular symposia, 125, 1998, pp. 77-82
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
1022-1360
Volume
125
Year of publication
1998
Pages
77 - 82
Database
ISI
SICI code
1022-1360(1998)125:<77:ISOMOE>2.0.ZU;2-Q
Abstract
Influence of emission sites on emission efficiency and running durabil ity of molecular organic electroluminescent devices was investigated. When fluorescent dye rubrene was doped into TPD diamine hole transport layer, rubrene molecule emitted bright yellow light with a max. lumin ance of 61 000 cd/m(2). The device had the highest efficiency of 9.8 l m/W at 100 cd/m(2). Half-decay time of the device from initial luminan ce of 530 cd/m(2) under constant direct current was 3 600 h. On the ot her hand, when rubrene was doped into BeBq(2) complex electron transpo rt layer, the efficiency was 4.4 Im/W and the half-decay time was 110 h. Thus doping site is found to exert significant influence both on th e emission efficiency and the running durability.