Organic optoelectronic device and the encapsulation method thereof

US9082999B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Tony Maindron · Grenoble, FR
• Bernard Aventurier · Grenoble, FR
• Jean-Yves Simon · Wiltz, LU

Key dates

• Filing date: Apr 2, 2012
• Grant date: Jul 14, 2015
• Expiry date: Apr 2, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

An organic optoelectronic device incorporating a hermetic thin-film encapsulation, and encapsulation method are provided. This device has a useful emission or absorption face and, behind this face, a substrate coated with an array of radiation-emitting or radiation-absorbing organic structures inserted between, and electrically contacting, electrodes that are respectively proximal and distal relative to the substrate. Separating beads between structures, composed of an insulating material, extend between the respective proximal electrodes of the structures from peripheral edges of these electrodes. The device includes a hermetic encapsulation that has at least one inorganic internal film surmounting the distal electrode, a photosensitive polymer layer covering this internal film, and a dielectric inorganic external film acting as a barrier covering the polymer layer. The polymer layer is etched with a discontinuous geometry formed of segments that respectively surmount the structures and end beyond the structures in line with the beads.