Satellite peak generation in the electroluminescence spectrum of ZnS:Sm grown by metalorganic chemical vapor deposition with Cl codoping

摘要

ZnS:Sm, ZnS:Sm,Cl, and ZnS:Cl thin films were grown by metalorganic chemical vapor deposition using the thdhyphen;chelate (thd=2,2,6,6hyphen;tetramethylhyphen;3,5hyphen;heptanedione) of Sm and hydrogen chloride. The electroluminescence spectrum of the ZnS:Sm,Cl showed three satellite peaks appearing in each of the 7 nm ranges around the three dominant peaks that the ZnS:Sm has originally. The ZnS:Sm,Cl also showed photoluminescence attributed to the selfhyphen;activated centers, but its intensity was less than 10minus;2of that of the ZnS:Cl. The effect of the Cl codoping on Sm3+luminescent properties is discussed on the basis of the Smhyphen;VZn(zinc vacancy)hyphen;Cl complex formation.