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ISO 20351:2024

Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for optical properties of ceramic phosphors for white light-emitting diodes using an integrating sphere

Oct 16, 2024

General information

60.60     Oct 16, 2024

ISO

ISO/TC 206

International Standard

81.060.30  

English  

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Scope

This document specifies test methods for the use of an integrating sphere to measure the optical properties of ceramic phosphor powders, which are used in white light-emitting diodes (LEDs) and emit visible light when excited by UV or blue light. This document specifies an absolute method to measure internal quantum efficiency and a substitution method to measure external quantum efficiency and absorptance. The substitution method uses reference materials whose external quantum efficiency and absorptance have been obtained in accordance with ISO 23946.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 20351:2017

NOW

PUBLISHED
ISO 20351:2024
60.60 Standard published
Oct 16, 2024