Novel Light Emitting Diode Using Organic Electroluminescence Microcapsules

✍ Scribed by Jae-Seok Heo; No-Hyung Park; Jee-Hyun Ryu; Gyung-Hyun Choi; Kyung-Do Suh

• Book ID: 102482397
• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 134 KB
• Volume: 204
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200350055

✦ Synopsis

Abstract

Novel light emitting diodes (LEDs) were prepared using electroluminescence (EL) material/polymer microcapsules (ELC). N‐vinylcarbazole as a hole‐transporting component and methyl methacrylate (MMA) were copolymerized for producing the seed particles using dispersion polymerization. An oxadiazole derivative, synthesized as a electron‐transporting component, and tris(8‐hydroxyquinolinato) aluminium(III) (Alq~3~) were incorporated into the polymer particles by using the solute co‐diffusion method (SCM). The LEDs for the EL characterization were fabricated in a thin sandwich configuration: Al anode/ELC/ITO cathode. The surface imaging of the LED prepared using ELC was performed by atomic force microscopy (AFM). The EL characteristics of the ELC were investigated by UV, photoelectron and luminescence spectroscopy, and the current‐voltage and the light‐voltage characteristics for the LED were determined.

Encapsulation procedure using solute co‐diffusion method (SCM).

magnified imageEncapsulation procedure using solute co‐diffusion method (SCM).