ZnCdS:Cu,Al,Cl: A near infra-red emissive family of phosphors for marking, coding, and identification

Journal article


Silver, J, Marsh, PJ, Fern, GR, Ireland, TG and Salimian, A (2018). ZnCdS:Cu,Al,Cl: A near infra-red emissive family of phosphors for marking, coding, and identification. ECS Journal of Solid State Science and Technology. 7 (1), pp. R3057-R3063. https://doi.org/10.1149/2.0131801jss
AuthorsSilver, J, Marsh, PJ, Fern, GR, Ireland, TG and Salimian, A
Abstract

© The Author(s) 2017. Published by ECS. Zn1-xCdx:Cu0.03%,Cl (where x = 0.5-0.9) infrared emitting phosphors have been synthesized by an aqueous thermal decomposition method. The aim was to developing infrared emitting phosphors for coding, marking, and identification applications. The phosphors were characterized by, X-ray powder diffraction, scanning electron microscopy and photoluminescence spectroscopy. The emission band at 1000 nm was sufficiently far into the infrared region that visible emission was minimized. Co-doping Zn1-xCdxS:Cu0.03% with Al3+ increased the infrared emission intensity to over twice that of the equivalent Zn0.3Cd0.7S:Cu0.03% phosphor (with no Al3+ ion co-doping), with the highest intensity being found for the phosphor composition Zn0.1Cd0.9S:Cu0.03%, Al0.03%. It is shown herein that the inclusion of Al3+ into the phosphors causes the formation of cells with smaller cell volume, and it is suggested that this is the prerequisite for the improved photoluminescent properties. Finally we have shown herein that these infrared emitting powder phosphors are thus able to meet marking and coding requirements, especially in low light and poor visibility.

Year2018
JournalECS Journal of Solid State Science and Technology
Journal citation7 (1), pp. R3057-R3063
PublisherThe Electrochemical Society
ISSN2162-8769
Digital Object Identifier (DOI)https://doi.org/10.1149/2.0131801jss
Publication dates
Print01 Jan 2018
Online16 Sep 2017
Publication process dates
Accepted01 Jan 2018
Deposited12 Feb 2021
Publisher's version
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File Access Level
Open
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