Mr. Brenden Carlson Profile

Brenden Carlson

at Univ of Washington

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Publications (6)

Proceedings Article | 16 February 2004 Paper

Synthesis and design of organic light-emitting devices containing lanthanide cored complexes

Gregory Phelan, Brenden Carlson, Rhys Lawson, Daniel Rowe, Kolby Allen, Larry Dalton, Xuezhong Jiang, Joo Kim, Alex Jen

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.506518

KEYWORDS: Europium, Lanthanides, Metals, Molecules, Energy transfer, Osmium, Polymers, Gadolinium, Organic light emitting diodes, Absorption

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Proceedings Article | 16 February 2004 Paper

Tuned emission from organic light-emitting devices based upon divalent osmium complexes

Brenden Carlson, Gregory Phelan, Joo Kim, Alex Jen, Larry Dalton

Proceedings Volume 5214, (2004) https://doi.org/10.1117/12.506515

KEYWORDS: Osmium, Absorption, Electroluminescence, Energy transfer, External quantum efficiency, Organic light emitting diodes, Metals, Quantum efficiency, Ions, Polymers

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Proceedings Article | 3 March 2003 Paper

Organic light-emitting devices based upon divalent osmium complexes: I. Design, synthesis, and characterization of osmium complexes.

Brenden Carlson, Gregory Phelan, Xuezhong Jiang, Werner Kaminsky, Alex K.Y. Jen, Larry Dalton

Proceedings Volume 4800, (2003) https://doi.org/10.1117/12.451877

KEYWORDS: Osmium, Organic light emitting diodes, Metals, Chemical species, Absorption, Quantum efficiency, Molecules, Phosphorescence, Arsenic, Crystals

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Proceedings Article | 3 March 2003 Paper

Organic light-emitting diodes containing fluorinated asymmetrical europium cored beta-diketone complexes

Gregory Phelan, Brenden Carlson, Xuezhong Jiang, Alex K.Y. Jen, Larry Dalton

Proceedings Volume 4800, (2003) https://doi.org/10.1117/12.451879

KEYWORDS: Europium, Metals, Polymers, Electroluminescence, Absorption, Energy transfer, Luminescence, External quantum efficiency, Organic light emitting diodes, Light emitting diodes

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Proceedings Article | 4 November 2002 Paper

Organic light-emitting diodes incorporating nanometer thick films of europium-cored complexes

Gregory Phelan, Brenden Carlson, Xuezhong Jiang, Alex K.Y. Jen, Larry Dalton

Proceedings Volume 4809, (2002) https://doi.org/10.1117/12.453781

KEYWORDS: Europium, Energy transfer, Polymers, Electroluminescence, Gadolinium, Metals, External quantum efficiency, Absorption, Luminescence, Ultraviolet radiation

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Europium cored complexes may be used as a source of red emission in light emitting diodes. Novel europium cored complexes have been synthesized and incorporated into organic light emitting diodes (OLED's). These complexes emit red light at 615 nm with a full width half maximum (FWHM) of less than 5 nm. The europium complexes consist of one equivalent of europium chelated to three equivalents of a nonsymmetrical β-diketone ligand. The Claissen condensation of a polycyclic aromatic sensitizer and an ester of a fluorinated carboxylic acid create the ligands. The use of a sensitizer such as phenanthrene results in a ligand that has an emission band that directly overlaps with the absorption band of europium. The use of fluorinated chains improves the overall processibility as well as the charge transfer capability of the resulting metal cored complex. The europium core is further encapsulated by the inclusion of an additional polycyclic aromatic compound such as 4, 7 diphenyl - 1, 10 phenanthroline. Emission of 615 nm light is accomplished through excitation of the ligand and efficient Forrester energy transfer to the europium complex. A multiple layer device consisting of a substrate of indium tin oxide, followed by thin layers of BTPD-PFCB (with a thickness of 20nm), a polymer blend containing the europium complex (30 nm), followed by a layer of calcium (50nm) and finally a protective layer of silver (120 nm). The polymer blends were either poly(n-vinyl carbazole)(PVK) or poly vinyl naphthalene (PVN). The device performance was further improved by the incorporation of another lanthanide metal complex. These complexes were based upon similar ligands surrounding gadolinium. In these devices, there is a Dexter energy transfer as well as the Forster energy transfer. For the devices that are based on a PVN:PBD as a polymer host, the lowest turn on voltage was 12.0 volts. The devices that use PVK:TPD devices was 178 cd/m² with an external quantum efficiency of 0.61%.For PVK:TKD the brightness was 116 cd/m² with an external quantum efficiency of 0.048%. Devices that incorporate the gadolinium complexes have the turn on voltage of 5.6 volts. We report a maximum brightness of 201 cd/m² with an external quantum efficiency of 1.0%.

Proceedings Article | 4 November 2002 Paper

Organic light-emitting devices based upon divalent osmium complexes: II. Design, fabrication, and characterization of osmium nanoscale devices

Brenden Carlson, Xuezhong Jiang, Alex K.Y. Jen, Larry Dalton

Proceedings Volume 4809, (2002) https://doi.org/10.1117/12.453782

KEYWORDS: Osmium, Absorption, Electroluminescence, External quantum efficiency, Quantum efficiency, Energy transfer, Organic light emitting diodes, Molecules, Metals, Calcium

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