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Light-emitting device with organic electroluminescent material and photoluminescent materials

United States Patent

June 7, 2005
View the Complete Patent at the US Patent & Trademark Office
A light-emitting device comprises a light-emitting member, which comprises two electrodes and an organic electroluminescent material disposed between the electrodes, and at least one organic photoluminescent ("PL") material. The light-emitting member emits light having a first spectrum in response to a voltage applied across the two electrodes. The organic PL material absorbs a portion of the light emitted by the light-emitting member and emits light having second spectrum different than the first spectrum. The light-emitting device can include an inorganic PL material that absorbs another portion of the light emitted from the light-emitting member and emits light having a third spectrum different than both the first and the second spectra.
McNulty; Thomas Francis (Ballston Lake, NY), Duggal; Anil Raj (Niskayuna, NY), Turner; Larry Gene (Schenectady, NY), Shiang; Joseph John (Niskayuna, NY)
General Electric Company (Niskayuna, NY)
09/ 683,345
December 17, 2001
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was first conceived or reduced to practice in the performance of work under contract DE-FC26-00NT40989 awarded by the United States Department of Energy. The United States of America may have certain rights to this invention.