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Hole Traps in Rare Earth Doped MgS
Published online by Cambridge University Press: 28 February 2011
Abstract
W report here the nature of the hole traps in singly doged (Ce3+, Tb3+ or Sm3+) and doubly doped (Ce3+ or Eu2+ and Sm3+) MgS. Ce3+ switches its role from electron trap to hole trap when Sm3+ is added to the host. Stimulated luminescence involving these hole trapsare presented. On codoping with monovalent Li+ or Na+ ions V type hole centers can be significantly reduced in MgS doped with the trivalent ions.
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