Reversible photoionization process in luminescent Ce³⁺doped elpasolite-type fluoroindates

Discussion on the Structure Stability and the Luminescence Switch under Irradiation of a Ce‐Doped Elpasolite Compound

“…Another much weaker signal was detected in the Ce‐doped Rb 2 KInF 6 materials (Figure 3 b), but this signal differs from the data published by Chaminade et al., who attributed the λ =320 nm band to Ce 3+ in the rubidium site and a third band at λ =424 nm to Ce 3+ in the potassium site 13. 28 In the present investigation, a second emission was identified at λ =340 nm for an excitation at λ =270 nm.…”

“…Synthesis : According to the literature, fluoride elpasolite phases can be synthesized by solid‐state routes,5, 31, 32 and crystal growth 13. Two types of crystal growth processes are usually used: the Czochralski or the Bridgman methods 25.…”

“…Two types of crystal growth processes are usually used: the Czochralski or the Bridgman methods 25. As the photoluminescence described previously,13 was performed on a 1 % doped materials, we fixed the percentage at a higher concentration (2 % of molar substitution at the In site) to increase the effect of the rare‐earth element introduction on the host lattice.…”

“…The Ce‐doped Rb 2 KInF 6 elpasolite was previously studied by Chaminade et al 13. These authors announced that the Ce 3+ doping element was located in three sites.…”

“…The properties obtained for various compositions are the subject of numerous studies 3–7. Transition‐metal‐ or rare‐earth‐doped elpasolite matrices are used in several emitting systems, such as laser devices,8–10 light‐emitting diodes, quantum cutters,11 crystal scintillators,12, 13 and neutron and gamma detectors 14. In addition, these matrices are used in medical radiation detection apparatuses,15 and in data storage devices 16.…”