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dc.contributor.authorWithnall, R-
dc.contributor.authorSilver, J-
dc.contributor.authorIreland, TG-
dc.contributor.authorFern, GR-
dc.contributor.authorMarsh, PJ-
dc.date.accessioned2014-08-19T08:23:22Z-
dc.date.available2014-08-19T08:23:22Z-
dc.date.issued2009-
dc.identifier.citationJournal of the Electrochemical Society, 156(11), J326 - J332, 2009en_US
dc.identifier.issn0013-4651-
dc.identifier.urihttp://jes.ecsdl.org/content/156/11/J326en
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/8909-
dc.description© The Electrochemical Society, Inc. 2009. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version is available at the link below.en_US
dc.description.abstractDespite many researches over the last half century, the mechanism of ac powder electroluminescence remains to be fully elucidated and, to this end, a better understanding of the relatively complex structure of alternate current electroluminescence (ACEL) phosphors is required. Consequently, the structure and morphology of ZnS:Cu,Cl phosphor powders have been investigated herein by means of scanning electron microscopy (SEM) on hydrochloric acid-etched samples and X-ray powder diffraction. The latter technique confirmed that, as a result of two-stage firing during their synthesis, the phosphors were converted from the high temperature hexagonal (wurtzite) structure to the low temperature cubic (sphalerite) polymorph having a high density of planar stacking faults. Optical microscopy revealed that the crystal habit of the phosphor had the appearance of the hexagonal polymorph, which can be explained by the sphalerite pseudomorphing of the earlier wurtzite after undergoing the hexagonal to cubic phase transformation during the synthesis. SEM micrographs of the hydrochloric-etched phosphor particles revealed etch pits, a high density of planar stacking faults along the cubic [111] axis, and the pyramids on the (111) face. These observations were consistent with unidirectional crystal growth originating from the face showing the pyramids.en_US
dc.description.sponsorshipEPSRC, DTI, and the Technology Strategy Board-led Technology Program.en_US
dc.languageEnglish-
dc.language.isoenen_US
dc.publisherElectrochemical Societyen_US
dc.subjectChlorineen_US
dc.subjectCopperen_US
dc.subjectElectroluminescenceen_US
dc.subjectFiring (materials)en_US
dc.subjectMaterials preparationen_US
dc.subjectPhosphorsen_US
dc.subjectPowdersen_US
dc.subjectScanning electron microscopyen_US
dc.subjectSolid state phase-transformationsen_US
dc.subjectStacking faultsen_US
dc.subjectX-ray diffractionen_US
dc.subjectZinc compoundsen_US
dc.titleStructure and morphology of ACEL ZnS:Cu,Cl phosphor powder etched by hydrochloric aciden_US
dc.typeArticleen_US
dc.identifier.doihttp://dx.doi.org/10.1149/1.3207950-
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