Nucleation kinetics and growth of ZnS Se(1−) single crystals from vapour phase

Autor:	R. Dhanasekaran, S. Soundeswaran, O. Senthil Kumar
Rok vydání:	2004
Předmět:	Supersaturation Chemistry business.industry Nucleation Crystal growth Partial pressure Condensed Matter Physics Semiconductor Phase (matter) Physical chemistry Deposition (phase transition) General Materials Science Classical nucleation theory business
Zdroj:	Materials Chemistry and Physics. 87:75-80
ISSN:	0254-0584
Popis:	Theoretical calculations have been made for the nucleation kinetics during the growth of ZnS x Se (1− x ) single crystals by chemical vapour transport technique using iodine transporting agent. The partial pressures of S 2 , Se 2 , ZnI 2 , I and I 2 were calculated using a thermodynamic model at different deposition temperatures (800–900 °C) using different iodine concentrations (0.5–10 mg cm −3 ). Supersaturation ratios of S 2 and Se 2 which affect the formation and composition of ZnS x Se (1− x ) single crystals during growth have been calculated. The size and free energy of formation of a critical nucleus have been calculated using classical nucleation theory as a function of growth temperature and iodine concentration. The growth of ZnS x Se (1− x ) single crystals has been carried out by CVT method using iodine transporting agent. The XRD and etching studies have been carried out to the grown crystals. The results were correlated with the theoretical calculations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::94a743ebc4885f03a3771b3c34f3d271 https://doi.org/10.1016/j.matchemphys.2004.04.008 Zobrazit plný text záznamu Full Text from ScienceDirect