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Extraction enhancement in organic light emitting devices by using metallic nanowire arrays
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FIG. 1.

(a) Type I device; nanowire arrays were placed next to the OLED. (b) Type II device; nanowire arrays were placed between the organic layers and ITO anode. (c) The AFM image of a period gold nanowire array. (d) The transmission spectra of the gold nanowire array compared with the ITO substrate.

Image of FIG. 2.

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FIG. 2.

(a) Colors of the extraction light by different period nanowire arrays. Colors from blue to red can be selected. (b) The extraction light intensity vs the period. In the Alq3 based device, the maximum extraction occurs when period is . The inset shows the electroluminescent spectrum of Alq3 and wavelength selected by the nanowire arrays. The periods are with interval.

Image of FIG. 3.

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FIG. 3.

(a) The CCD image of type I device with period nanowire arrays. The line profile shows the brightness in the nanowire arrays is approximately 42% of the OLED. (b) The CCD image of type Ii device. The line profile between these two regions indicates that nanowire arrays increase the brightness up to 80%.

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/content/aip/journal/apl/92/1/10.1063/1.2828712
2008-01-04
2014-04-18

Abstract

The extraction efficiency of organic light emitting devices is enhanced by depositing metallic nanowires on the glass surface and indium tin oxide (ITO) anode. For the aluminum tris-(8-hydroxyquinoline) (Alq3) based devices, a -width and -period goldnanowire array increases light extraction up to 46% from glass substrate and 80% from the organic layer. Such metallic nanowire arrays double the brightness with small absorption, only 10% lower than ITO glass. In addition, colors of the devices can be selected by the period of nanowire array. We demonstrated blue to red light emission by using single Alq3-based device.

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Scitation: Extraction enhancement in organic light emitting devices by using metallic nanowire arrays
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/1/10.1063/1.2828712
10.1063/1.2828712
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