https://scholars.lib.ntu.edu.tw/handle/123456789/342720
Title: | Balanced ambipolar charge carrier mobility in mixed layers for application in hybrid white organic light-emitting diodes | Authors: | Gregor Schwartz Tung-Huei Ke CHUNG-CHIH WU Karsten Walzer Karl Leo |
Issue Date: | Jan-2008 | Journal Volume: | 93 | Journal Issue: | 7 | Start page/Pages: | 073304 | Source: | Applied Physics Letters | Abstract: | We investigate the electron and hole mobility in mixed layers of N, N′ -di(naphthalen-1-yl)- N, N′ -diphenyl-benzidine and bis(2-methyl-8-quinolinato)-4-phenylphenolate aluminum with different mix ratios, using both space-charge limited currents of single-carrier devices with electrically doped charge transport layers and time-of-flight measurements. Both experimental methods yield consistent results. The 1:1 blend shows balanced ambipolar charge carrier transport, which is advantageous for the application as exciton blocking interlayer in hybrid white organic light-emitting diodes: The electroluminescence spectrum is rather stable against changes in interlayer thickness and driving current. Moreover, the external quantum efficiency is enhanced by a factor of 2.5 as compared to a device without interlayer. © 2008 American Institute of Physics. |
URI: | http://scholars.lib.ntu.edu.tw/handle/123456789/342720 https://www.scopus.com/inward/record.uri?eid=2-s2.0-50249180153&doi=10.1063%2f1.2973151&partnerID=40&md5=21d012b008a7156010f699a542f996e2 |
DOI: | 10.1063/1.2973151 | SDG/Keyword: | Alumina; Charge carriers; Civil aviation; Hole mobility; Light; Light emission; Light emitting diodes; Light metals; Organic light emitting diodes (OLED); Ambipolar; Charge transport layers; Charge-carrier mobilities; Charge-carrier transport; Driving currents; Electroluminescence spectrum; Experimental methods; External quantum efficiency; Interlayer thickness; Mixed layering; Single carriers; Space-charge limited currents; Time-of-flight measurements; White organic light-emitting diodes; Carrier mobility |
Appears in Collections: | 電機工程學系 |
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