The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Apr. 07, 2011
Arvid Hunze, Kleinblittersdorf, DE;
Ralf Krause, Erlangen, DE;
Chien-shu Chiu, Taipei, TW;
Frank Steinbacher, Nürnberg, DE;
Arvid Hunze, Kleinblittersdorf, DE;
Ralf Krause, Erlangen, DE;
Chien-Shu Chiu, Taipei, TW;
Frank Steinbacher, Nürnberg, DE;
Osram Opto Semiconductors GmbH, Regensburg, DE;
Abstract
A radiation-emitting device comprising a substrate, a first electrode and a second electrode, and an emitter layer arranged between the first and second electrode. The emitter layer here comprises a matrix material, 0.5-5% by weight of a radiation emitting emitter and 5-30% by weight of a phosphorescent exciton scavenger. The proportion by weight of the exciton scavenger here is higher than that of the radiation emitting emitter, and the emission maximum of the exciton scavenger is at a shorter wavelength than that of the radiation emitting emitter. In addition, the radiation-emitting device is characterized in that the current efficiency of the emitter layer is increased by at least 10% compared to the current efficiency of an emitter layer without exciton scavenger.