What is it about?
The performance of solar cells made from organic molecules can be enhanced by the insertion of layers between the indium-tin oxide (ITO) transparent conducting electrode and the organic material. By carefully characterizing each layer sequentially the reasons behind the increase in performance can be made clear.
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Why is it important?
In our work we determine the vanadium oxide layers to be highly n-type, in contrast to the assumed (and previously reported) p-type behaviour, with a large work function and a very low lying valence band. We propose the likely mechanism of hole-extraction from the SubPc molecule is through 'gap states' since there is a large barrier to extraction through the metal oxide valence band,
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This page is a summary of: Utilizing n-type vanadium oxide films as hole-extracting layers for small molecule organic photovoltaics, Frontiers in Human Neuroscience, July 2011, American Institute of Physics,
DOI: 10.1063/1.3607478.
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