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Current-voltage (I-V) measurements of the OLEDs based on hybrids of PFO/MEH-PPV. (a) In the absence of SiO2/TiO2 nanocomposites; (b) in the presence of SiO2/TiO2 nanocomposites. The inset shows the I-V curve of the OLEDs based on pristine MEH-PPV.
