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API MPMS CH 10.8, 3rd Edition: Standard Test Method for Sediment in Crude Oil by Membrane Filtration

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ISO/TR 42505:2026 Sharing economy — Shared manufacturing — Concepts and models

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ISO 4306-1:2026 Cranes — Vocabulary — Part 1: General

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ISO 13915:2023

ISO 13915:2023 Fine ceramics (advanced ceramics, advanced technical ceramics) – Test method for optical properties of ceramic phosphors for white light-emitting diodes with reference materials

CDN $195.00

Description

This document specifies a substitution measurement method to measure internal quantum efficiency, external quantum efficiency and absorptance 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 this method, commercially available measurement equipment, such as a fluorescence spectrophotometer or a spectroradiometer equipped with a monochromatic light source as incident light, are used to measure fluorescence spectra for reference materials whose quantum efficiencies and absorptance have been determined using the methods in ISO 23946 and a phosphor material under test.

Edition

1

Published Date

2023-08-16

Status

PUBLISHED

Pages

15

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

This document specifies a substitution measurement method to measure internal quantum efficiency, external quantum efficiency and absorptance 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 this method, commercially available measurement equipment, such as a fluorescence spectrophotometer or a spectroradiometer equipped with a monochromatic light source as incident light, are used to measure fluorescence spectra for reference materials whose quantum efficiencies and absorptance have been determined using the methods in ISO 23946 and a phosphor material under test.

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