Study on current–voltage characteristics of OLEDs using Alq3 as the electron transport layer

Nguyen, Kien Cuong (2011) Study on current–voltage characteristics of OLEDs using Alq3 as the electron transport layer. VNU Jounal of science, Mathermatics - Physics, 27 (3). pp. 174-180. ISSN 0866-8612

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Abstract

This paper describes changes in current-voltage (I-V) characteristic of an organic lightemitting device (OLED) stacked as a multilayer of ITO/MEH-PPV/Alq3/Al. The ordered, stacked ITO/MEH-PPV/Alq3/Al multi-layers were fabricated by spin-coating and thermal vacuum evaporation methods. First, dissolved MEH-PPV solution was spin-coated on ITO-electrodes that had been covered on a glass-slide. Subsequently, an Alq3 layer was evaporated thermally on the MEH-PPV-coated layer. Finally, an Al-electrode was evaporated also on the electron transport layer. UV-vis absorption and photoluminescent characterization of the MEH-PPV and Alq3 layer as well as their surface images were performed. All spectra obtained revealed the MEH-PPV and Alq3 were deposited as given structure. The I-V characteristics show the present of the Alq3-electron transport layer deposited between the MEH-PPV emissive layer and Al-cathode could enhance current-voltage characteristic reducing the threshold voltage and turn-on voltage. Keywords: UV-vis absorption, photoluminescence, electron transport layer, current-voltage characteristics.

Item Type:	Article
Subjects:	Engineering Physics
Divisions:	Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User:	Assoc.Prof Cuong / Kien NGUYEN
Date Deposited:	06 Feb 2018 06:47
Last Modified:	06 Feb 2018 06:48
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/2922

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