Luminescence characteristics of LiCaAlF₆:Eu phosphor

Abstract

A simple method for preparing LiCaAlF6:Eu2+ phosphor is reported. Photoluminescence (PL) and thermoluminescence (TL) studies were carried out. The TL sensitivity of the phosphor is nearly twice that of CaSO4:Dy TLD phosphor. Several other properties required for TL dosimetry are superior as well. It is suggested that the phosphor can be a suitable replacement for CaSO4:Dy. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Luminescence of Ce3+ in Ca0.65La0.35F2.35 host

“…Lines at 2.0367, 2.0871, 3.615 and 3.698Å characteristic of LaF 3 are not at all seen and the pattern shows excellent match with ICDD file 87-0975. Thus, in contrast to the results on complex fluorides like LiCaAlF 6 [11], Ca 0.65 La 0.35 F 2.35 is not formed during the first stage of wetchemical preparation, but annealing at high temperature is necessary. Fig.…”

“…In recent years, some wet chemical processes for the synthesis of OH À free fluorides have been described [9,10]. We have successfully used these methods for synthesizing various fluorides [11][12][13][14] Use of chlorides as starting material helps in preventing the hydrolysis. Hence, complex fluorides were prepared by dissolving the analytical reagent grade chlorides of the constituent metals in the stoichiometric ratios in double distilled water in a PTFE container.…”

Luminescence of some Eu2+ activated bromides

“…Calcium sulfide codoped with europium and Sm/Pr 3+ are well-known infrared converting phosphors [16,17]. Intense thermoluminescence was found in Eu 2+ activated phosphors like LiCaAlF 6 :Eu [18] and K 2 Ca 2 (SO 4 ) 3 :Eu [19] which can be useful in dosimetry of ionizing radiations and related applications.…”

One step synthesis of complex fluoride powders for solid-state lasers

“…Gektin et al [19] presented detailed results on scintillation properties and thermoluminescence of LiCaAlF 6 :Ce 3+ . Recently, Aghalte et al have reported efficient TL in LiCaAlF 6 :Eu 2+ [20]. Similarly, presence of other likely phases such as CaAlF 5 , etc., was also ruled out.…”