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3. OLED characterization
The performance of light-emitting diodes can first be characterized by measuring their current-voltage-luminance signature (I-V-L curves).
Luminance is defined as the luminous intensity per unit apparent area of a source in a given direction. It is measured in cd/m 2 using a luminance meter placed perpendicular to the device.
The I-V-L characteristic curves are plotted by applying an increasing voltage across the device, and taking spot readings of the current flowing through the diode and the light produced. These measurements make it possible to evaluate and relate the electrical properties to the optical properties of the device.
Unlike luminance, which is a directional measurement, external quantum efficiency is a measurement...
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OLED characterization
Obtaining white OLEDs
Bibliography
Directory
Manufacturers, constructors (non-exhaustive list)
Philipps http://www.research.philipps.com
Novaled http://www.novaled.com
OLED100.EU http://www.oled100.eu
...Standards and norms
- Colorimetry – Part 5: Colour space L *u*v* and uniform chromaticity diagram u', v' CIE 1976 - ISO 11664-5:2009 (CIE S 014-5/E:2009) -
- CIE Standard illuminants for colorimetry - 10526:1999/CIE S 005/E-1998 -
- Vocabulaire international de l'éclairage - CIE 17.4:1987 -
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