In order to determine the ability of erbium to give a saturated green color, luminescent properties of Er3+ in the thiogallates
MGa2S4 false(M=normalCa,normalSr,normalBafalse)
MLaGa3S7 false(M=normalCa,normalSrfalse)
, and
La5/3Ga3S7
have been investigated. For efficient u.v. or cathodic excitation, the erbium charge transfer band must lie at longer wavelength than the lattice absorption edge; this is the case for the
MGa2S4
phases. Three processes can contribute to the population of the green emitting levels,
2H11/2
,
4S3/2
: direct transfer from the charge transfer band, multiphonon transitions, and cross‐relaxations. Multiphonon relaxation probabilities increase in the sequence
CaGa2S4
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.