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B51-14 (R2019) – Boiler, pressure vessel, and pressure piping code

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ISO 20351:2024

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

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Description

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.

Edition

2

Published Date

2024-10-16

Status

PUBLISHED

Pages

14

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

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.

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