Diode and method for realization of an organic electroluminescent diode has microcavity including of the doped organic layers

SCHEDA BREVETTO

Abstract:

An organic light emitting diode (OLED) emitting light downward through a transparent substrate. The OLED embeds a microcavity formed between a cathode and an anode and includes a plurality of organic layers including a light emitting layer. The plurality of organic layers include at least a first layer made of an organic doped material aimed at enhancing the transport of electrons; and at least a second layer made of an organic doped material aimed at enhancing the transport of holes. The anode is obtained by deposition of a semitransparent layer of silver (Ag) over the transparent substrate to be directly in contact with the first doped organic layer. Then, thicknesses of the first and second doped organic layers can be freely adapted to best adjust the optical characteristics of the microcavity for the wavelength of monochromatic light to be produced by the OLED.

Advantages:

Application field:

Specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)

Details of devices

Technical board:

The goals, objects, as well as the characteristics and advantages of the invention will arise better from the detailed description of a mode of realization of the latter which is illustrated by the following drawings of accompaniment in which
FIGURES it and lb illustrates DELOs known structures of former art.
The FIGURE 2a and 2b represent two alternatives a structure DELO
according to the invention including a microcavity between two reflective electrodes.
FIGURE 3 illustrates the reduction of the band of longueurs d’ondes emitted by the device of the invention corresponding to the resonance of the microcavity.
FIGURE 4 compares the apparent brightnesses obtained with from
DELOs realized according to the process of the invention.
The joined drawings are given as examples and are not restrictive invention.

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Patent Title

Diode and method for realization of an organic electroluminescent diode has microcavity including of the doped organic layers

Other Title

Diode et procede de realisation d’une diode electroluminescente organique a microcavite incluant des couches organiques dopées

Inventor(s)

DUSSERT VIDALET BRUNO

MAZZEO MARCO

GIGLI GIUSEPPE

BEN KHALIFA MOHAMED

DELLA SALA FABIO

MAIORANO VINCENZO

MARIANO FABRIZIO

Published As

Publ. number Pub. date Appl. number
Appl. date
Publ. Stage
FR2926677 20090724
2008FR-0050303
20080118
A1 – Application for patent of invention, (first publ.)

NsRIF

— Catalogo brevetti CNR

Country of validity

FR

Ownership

ASTRON FIAMM SAFETY

Contacts

info@ilo-puglia.cnr.it