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Evaluation of luminances and yields for red, green, and blue organic light emitting diodes

Published online by Cambridge University Press:  14 April 2005

P. Taillepierre ,
R. Antony  and
A. Moliton
P. Taillepierre
Affiliation:
U.M.O.P., CNRS FRE 2701, Faculté des Sciences et Techniques, 123 Av. Albert Thomas, 87060 Limoges, France
R. Antony
Affiliation:
U.M.O.P., CNRS FRE 2701, Faculté des Sciences et Techniques, 123 Av. Albert Thomas, 87060 Limoges, France
A. Moliton*
Affiliation:
U.M.O.P., CNRS FRE 2701, Faculté des Sciences et Techniques, 123 Av. Albert Thomas, 87060 Limoges, France
*
amoliton@unilim.fr
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Abstract

For red, green and blue OLEDs that emit for each of them in a wide spectral range ($\Delta \lambda \approx 200$ nm), we calculate the luminous luminance, the energetic luminance and the various yields in the pseudo-monochromatic hypothesis (ideal source generally considered), and we compare with a calculation in relation with a polychromatic system (real source). Finally, we demonstrate that the values of the energetic luminance and of the energetic or quantum yield are practically unchanged whatever the hypothesis; on the contrary, in the simplified case of the pseudo-monochromatic source, the luminous luminance and the luminous yield of a green organic diode are overvalued in relation to the polychromatic real case, whereas for a blue or a red organic diode these parameters (calculated in the pseudo-monochromatic hypothesis) are undervalued. The error is all the more great since the OLED emission is far away from the maximum value of the photoptical eye response.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 30 , Issue 3 , June 2005 , pp. 159 - 166
Copyright
© EDP Sciences, 2005

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