Citation: . MULTILAYER ORGANIC LEDS BASED ON A NEW DYE-DOPED POLYMER*[J]. Chinese Journal of Polymer Science, ;1999, 17(4): 343-346. shu

MULTILAYER ORGANIC LEDS BASED ON A NEW DYE-DOPED POLYMER*

Received Date: 11 March 1998

A blue dye, l-benzothiazoly-3-phenyl-pyrazoline (BTPP) was found to function as bright lightemitting dye in organic electroluminescent devices. This heterocyclic compound exhibits good characteristicsof blue photoluminescence and electroluminescence, which has emission peak at 445 nm.The thin films offluorescent dye dispersed in poly(N-vinylcarbazole) (PVK) could serve as light-emitting layers in multilayerorganic LEDs. 2-(4-Biphenyl)-5-(4-tert-butylpheynyl)-1,3,4-oxadiazole (PBD) and tris-(8-hydroxyquinoline)aluminum(Alq3)were introduced into double-layer and three-layer devices respectively.The introduction of electron transport material Alq3 enhanced the electron injection and luminous efficiency,as compared with double-layer devices.Maximum brightness and luminous efficiency can be reached up to 190 cd/m2 and 0.31m/W,respectively.
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