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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/8823

Title: Bright electroluminescence from single-layer organic light-emitting diodes comprising an ambipolar carrier transport layer of phenyldipyrenylphosphine oxide
Authors: Matsushima, Toshinori
Adachi, Chihaya
Keywords: Single-layer organic light-emitting diode
Phenyldipyrenylphosphine oxide
Ambipolar carrier transport
Exciton quenching
Issue Date: 2008-04-30
Publisher: Elsevier
Magazine name: Thin Solid Films
Volume: 516
Number: 12
Start page: 4288
End page: 4292
DOI: 10.1016/j.tsf.2007.09.038
Abstract: We investigated the carrier transport and recombination characteristics of single-layer organic light-emitting diodes (SLOLEDs) composed of a phenyldipyrenylphosphine oxide (POPy_2) layer doped with orange fluorescent molecules of 2,5-bis-[{bis-(4-methoxy-phenyl)-amino}-styryl]-terephthalonitrile (BST). The SLOLEDs achieved a high external quantum efficiency of 1.6% and a high luminance of 24,000 cd/m^2 at a low driving voltage of 8 V. These very good electroluminescence characteristics originate from factors that include our use of the following: (1) the ambipolar POPy_2 layer, which can transport balanced amounts of electrons and holes, (2) a high BST-doping concentration that traps injected carriers on BST molecules, and (3) insertion of an undoped POPy_2 layer next to a metallic cathode to prevent exciton quenching.
Rights: NOTICE: This is the author's version of a work accepted for publication by Elsevier. Toshinori Matsushima and Chihaya Adachi, Thin Solid Films, 516(12), 2008, 4288-4292, http://dx.doi.org/10.1016/j.tsf.2007.09.038
URI: http://hdl.handle.net/10119/8823
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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