Jk. Radhakrishnan et S. Selvasekarapandian, PHOTOLUMINESCENCE OF UNDOPED AND EU DOPED CSCL CRYSTALS, Journal of physics. Condensed matter, 6(30), 1994, pp. 6035-6041
CsCl crystals grown from water solution give a broad fluorescence emis
sion between 340 nm and 500 nm due to the OH- ions embedded in the lat
tice, which are also responsible for the 267 nm absorption band observ
ed in these crystals. Eu doped CsCl crystals give a prominent emission
with maximum at 440 nm, due to the divalent Eu ions. The emission due
to OH- ions is also observed in CsCl:Eu crystals.