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Electroluminescence imaging of organic photovoltaic modules
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Figures

Image of FIG. 1.

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FIG. 1.

Electroluminescence spectrum of a P3HT/PCBM module. The spectra were recorded at room temperature with a Ge detector. The applied bias was . The visible part of the spectrum was cut off with a RG 715 filter.

Image of FIG. 2.

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FIG. 2.

(a) Photograph of the P3HT:PCBM module. (b) EL image of the same module taken with an InGaAs detector (integration time of 5 s; bias of ). (c) EL image of the same module taken with a Si CCD camera (integration time of 10 min; bias of ). (d) EL image of a P3HT:PCBM module taken with a Si CCD camera and a cutoff filter at 950 nm (integration time of 10 min; bias of ).

Image of FIG. 3.

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FIG. 3.

EL intensity profile in the upper part of the module. Every cell shows a gradient in EL intensity, increasing from left to right.

Image of FIG. 4.

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FIG. 4.

Magnified EL image of the hot spot region in lane 2 recorded with the InGaAs camera. A dark spot is observed in the middle of the bright emitting area.

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/content/aip/journal/apl/97/23/10.1063/1.3521259
2010-12-08
2014-04-21

Abstract

We report on electroluminescence(EL)imaging of organic photovoltaic cells and modules with poly(3-hexylthiophene)/[6,6]-phenyl C61 butyric acid methyl ester as semiconductor layer. The dominant EL emission is found in a spectral regime between 1200 and 1400 nm and is identified as the radiative decay of the charge transfer complex formed between the polymer and the fullerene. Electroluminescence emission from the pristine compounds is either much weaker or completely absent. Overall, electroluminescenceimaging is shown to give valuable information on the defects but also on the performance of organic solar modules.

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Scitation: Electroluminescence imaging of organic photovoltaic modules
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/23/10.1063/1.3521259
10.1063/1.3521259
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