Low-temperature phase transition of ZnS: The critical role of ZnO

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Title:	Low-temperature phase transition of ZnS: The critical role of ZnO
Authors:	李岱洲;Lin, Po-Chang;Hua, Chi Chung;Lee, Tai-Chou
Contributors:	工學院化學工程與材料工程學系
Keywords:	Annealing;Chemical synthesis methods;Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder;Cross-disciplinary physics: materials science;rheology;Exact sciences and technology;GRAIN SIZE;Heterostructure;Hexagonal ZnS;INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;Materials science;Methods of nanofabrication;Nanoparticle;Nanopowders;Nanoscale materials and structures: fabrication and characterization;PARTICLES;Phase diagrams and microstructures developed by solidification and solid-solid phase transformations;Phase transformation;PHASE TRANSFORMATIONS;Physics;POWDERS;SEMICONDUCTOR MATERIALS;Semiconductors;Solid phases;STABILITY;Thermodynamic stability;Transforms;TRANSITION TEMPERATURE;Wurtzite ZnS;Zinc oxide;ZINC OXIDES;ZINC SULFIDES
Date:	2012-10-01
Issue Date:	2026-04-21 13:59:55 (UTC+8)
Publisher:	Academic Press Inc.;Amsterdam: Elsevier Inc
Abstract:	摘要： Wurtzite zinc sulfide (WZ-ZnS) is a valuable wide-band-gap semiconductor. However, it is difficult to synthesize due to its high transition temperature (1020°C). This study investigates the formation of WZ-ZnS particles using a ZnO template. Various phase structures of ZnS with the same size but different levels of ZnO content are generated during the annealing process. The transition temperature can be lowered significantly to below 350°C. Furthermore, when the powders of ZnO and zinc-blende ZnS are mixed, large ZnS particles are not induced by ZnO to transform into WZ-ZnS. The results strongly suggest that grain size is an essential but not sufficient factor in the formation of WZ-ZnS at lower temperatures. By controlling pH of the precursor, wurtzite ZnS particles can be generated at ∼350°C. The ZnO-template mechanism was proposed and discussed. [Display omitted] ► Wurtzite ZnS particles were prepared by using simple wet chemistry. ► pH of the precursor solution was adjusted to decrease the phase transition temperature of ZnS. ► ZnO-template-inducing mechanism of ZnS phase transition was proposed and discussed. 出版者： Amsterdam: Elsevier Inc 出版日期： 2012-10-01 出處： Journal of solid state chemistry, 2012-10, Vol.194, p.282-285 版權： 2012 Elsevier Inc. 版權： 2014 INIST-CNRS 識別號： ISSN: 0022-4596 識別號： EISSN: 1095-726X 識別號： DOI: 10.1016/j.jssc.2012.05.017 識別號： CODEN: JSSCBI
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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