Organic Light-Emitting Devices with In-Doped (4 at. %) ZnO Thin Films as the Anodic Electrode

Autor:	Eunkyoung Nam, Young Ran Park, Young-Sung Kim
Rok vydání:	2008
Předmět:	Materials science Physics and Astronomy (miscellaneous) business.industry Doping General Engineering Pulsed DC General Physics and Astronomy Substrate (electronics) Sputter deposition Anode OLED Optoelectronics Quantum efficiency Thin film business
Zdroj:	Japanese Journal of Applied Physics. 47:468-471
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.47.468
Popis:	We have investigated transparent conducting properties of using In-doped (4 at. %) zinc oxide (IZO) thin films deposited on glass substrate by pulsed DC magnetron sputtering at low processing substrate temperatures. As increase of the substrate temperature, IZO thin films with better c-axis orientations were grown in perpendicular to the substrate and work functions of IZO films slightly decrease. The optical properties showed high transmittance of higher than 85% in the UV–visible region and exhibited the absorption edge of about 350 nm. The electrical properties exhibited the low resistivity of 1.1 ×10-3 Ω cm and the high mobility of ~7.8 cm2 V-1 s-1. The organic light emitting diodes (OLEDs) with an IZO anode achieved a maximum luminance efficiency of 2.7 cd/A and external quantum efficiency of 0.47%, which are compared to the values of a control device fabricated on commercial ITO anode. These results indicate that IZO films hold promise for anodic electrodes in the OLEDs application.
Databáze:	OpenAIRE
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