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Near-infrared to visible light optical upconversion by direct tandem integration of organic light-emitting diode and inorganic photodetector
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10.1063/1.2710003
/content/aip/journal/apl/90/9/10.1063/1.2710003
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/9/10.1063/1.2710003
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Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the cross section of an inorganic-organic upconverter device. Note that the thickness of the organic and inorganic layers is not to the scale. Hole transport layers consist of NPB, CuPc, and . CuPc stands for copper phthalocyanine. NPB is -di(naphthalene-l-yl)--diphenyl-benzidine.

Image of FIG. 2.
FIG. 2.

Current-voltage-luminance curves of the upconversion device under infrared illumination (input power density of ). The inset shows the emission spectrum from the OLED of the integrated upconverter peaked at in wavelength (green light).

Image of FIG. 3.
FIG. 3.

(a) Measured photocurrent density as a function of device bias under infrared radiation (at ) and the calculated responsivity (A/W) of the detector component. (b) Measured luminance efficiency (cd/A) of the OLED component of the integrated upconverter and the calculated optical power efficiency (W/A). (c) Overall external upconversion efficiency (W/W) as a function of device bias calculated by multiplying the responsivity of the part (a) and the OLED power efficiency (b).

Image of FIG. 4.
FIG. 4.

OLED luminance efficiency of the two devices with (A) or without (B) surface treatment. It shows that the surface treatment significantly enhances the device performance by reducing the turn-on voltage by (at ) and by improving the maximum OLED luminance efficiency from .

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/content/aip/journal/apl/90/9/10.1063/1.2710003
2007-02-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Near-infrared to visible light optical upconversion by direct tandem integration of organic light-emitting diode and inorganic photodetector
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/9/10.1063/1.2710003
10.1063/1.2710003
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