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W2079351433 abstract "Detailed investigations ofI–V characteristics and impedance spectroscopy of light emitting diodes (LEDs) based on poly-p-phenylene-vinylene (PPV) indicate that the devices operate like Schottky diodes.I–V characteristics reveal a good ectification ratio of 104–106 and can be described using the Shockley equation. The emission spectra of the Ls depend on the degree of substitution of the PPV-polymer. The quantum efficiency of LEDs from mixtures of PPV and substituted PPV exceeds the quantum efficiency from pure PPV typically by a factor of 2–5. Under illumination a photovoltaic effect is measured with open circuit voltages up to 1.3 V on Al/PPV/ITO devices. The power conversion efficiency of these solar cells increases with increasing temperature and values between 0.1% and 1% can be achieved." @default.
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W2079351433 date "1994-04-01" @default.
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W2079351433 title "Electroluminescence and photovoltaic effect in PPV Schottky diodes" @default.
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