What is ISO 23946 about?
ISO 23946 specifies a method for use of a gonio-spectrofluorometer to measure internal quantum efficiency, external quantum efficiency, absorptance, luminescent radiance factor and relative fluorescence spectrum of ceramic phosphor powders which are used in white light-emitting diodes (LEDs) and emit visible light when excited by UV or blue light.
In ISO 23946, measurement conditions and procedures, which can affect the measurement values, are described in detail, helping those who address the high-performance phosphors for competitive solid-state lighting products to obtain the proper information on their competitiveness.
ISO 23946 can also be adopted to phosphors used in non-white LEDs, for example green, orange,
pink and purple.
Who is ISO 23946 for?
ISO 23946 on fine ceramics is useful for:
- Manufacturers of ceramics and phosphors
- Manufacturers of LED
- Researchers and development team
- Biomedical sectors
- Quality control personnel
- Testing laboratories
Why should you use ISO 23946?
Optical performance of a phosphor material for use in a white light-emitting diode (LED) is one of the most important factors influencing the performance of the white LED. Photoluminescence quantum efficiency is one of the key optical parameters of phosphors for use in white LEDs and has been measured extensively by using an integrating sphere-based absolute method.
ISO 23946 provides you with the absolute measurement methods of external quantum efficiency and absorptance as well as internal quantum efficiency and related optical properties for ceramic phosphors for use in white LEDs using a gonio-spectrofluorometer. This equipment is regarded as one of the variations of a gonio-reflectometer commonly used to evaluate optical properties of material surfaces.
Test method included in ISO 23946 has the advantage of short measurement time and being available to those with no expertise in precise optical measurement.