Decay kinetics of the green emission in tungstates and molybdates

Photo-stimulated luminescence and photo-induced infrared absorption in ZnWO4

“…These values are partially in accordance with the previous results (Babin et al, 2004;Chernov et al, 2004;Mikhailik and Kraus, 2006). Fig.…”

Time-resolved luminescence from Jahn-Teller split states of self-trapped excitons inPbWO4

“…If so, the magnitude of the energy separation δ is expected to be sensitively dependent on the crystal structure of tungstates. This expectation is supported by the recent experiment by Babin et al, 28) who investigated the luminescence decay kinetics of scheelite-structured PWO and wolframite-structured CdWO 4 in the range of T = 0.4−400 K and revealed that the value of δ in wolframite is 3−4 times as large as that in scheelite.…”

“…The present result says nothing as to which of the other three is correct, though there is a recent paper claiming that the proposal (ii) is improbable. 28 …”

Localized excitons and defects in PbWO4 single crystals: a luminescence and photo‐thermally stimulated disintegration study

“…In the Mo-doped crystals this emission was ascribed to the unperturbed MoO 4 2-groups [6][7][8][9] or to the MoO 4 2-groups perturbed by various intrinsic defects [10]. In undoped crystals, the G(I) emission was ascribed to the excitons of the type of WO 4 2-localized near various intrinsic defects [11] or in the lead-deficient crystal regions [12]. The green emission of the second type (denoted as the G(II) emission), appearing in the oxygen vacancies containing crystals at T > 150 K, was ascribed to the oxygen-deficient anion complexes in the form of WO 3 [11].…”

“…In undoped crystals, the G(I) emission was ascribed to the excitons of the type of WO 4 2-localized near various intrinsic defects [11] or in the lead-deficient crystal regions [12]. The green emission of the second type (denoted as the G(II) emission), appearing in the oxygen vacancies containing crystals at T > 150 K, was ascribed to the oxygen-deficient anion complexes in the form of WO 3 [11]. In [13], the green emission of PbWO 4 crystals was also ascribed to WO 3 groups.…”