Authors: Kong, Chao; Xu, Zheng; Zhao, Suling; Zhang, Fujun; Yan, Guang; Gong, Wei; Liu, Rui; Sun, Qinjun

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 11, November 2011 , pp. 9451-9455(5)

Publisher: American Scientific Publishers

Abstract:

The effect of indium tin oxide (ITO) in organic light emitting diodes (OLEDs) treated by vanadium penoxide (V₂O₅) saturation solution was studied. The device with ITO treated by ultraviolet-ozone (UV-ozone) was fabricated in the same run for comparison. It was found that the V₂O₅ solution-treated devices have much higher current efficiency compared to the device with bare ITO and UV-ozone-treated ITO as the anode. The turn-on voltages were reduced by around 2.5 V, and the luminances were about 1.69 times greater than that of the conventional device at 16 V driving voltage. Series resistances were determined by the slope of the current-voltage curve and the ac impedance spectroscopy technique.

Keywords: VANADIUM PENTOXIDE; ORGANIC LIGHT EMITTING DIODE; CARRIER BALANCE; IMPEDANCE SPECTROSCOPY

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.5205

Publication date: 2011-11-01

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