Patent · US Active

Organic electroluminescent device

US8987987B2 · kind B2 · utility

1Cited by

2References

20Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Herbert Friedrich Boerner · Aachen, DE
Helga Hummel · Aachen, DE
Claudia Michaela Goldmann · Aachen, DE

Key dates

Filing date	Oct 5, 2011
Grant date	Mar 24, 2015
Priority date	—
Expiry date	Oct 5, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH10K50/856
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention provides an OLED device with improved light out-coupling, which can be manufactured easy and reliable at low costs, which comprises an electroluminescent layer stack (2, 3, 4) on top of a substrate (1), where the electroluminescent layer stack (2, 3, 4) comprises an organic light-emitting layer stack (3) with one or more organic layers sandwiched between a first electrode (2) facing towards the substrate (1) and a 10 second electrode (4), where the second electrode (4) comprises a layer stack of at least a transparent conductive protection layer (41) on top of the organic light-emitting layer stack (3), a transparent organic conductive buckling layer (42) on top of the protection layer (41) having a glass transition temperature lower than the lowest glass transition temperature of the organic layers within the organic light-emitting layer stack (3) and a stress inducing layer 15 (43) on top of the buckling layer (42) to introduce stress to the buckling layer (42). The invention further relates to a method to manufacture such OLED devices with heating the electroluminescent layer (2, 3, 4) stack to a temperature, which is above the glass transition temperature of the b…

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.