Thermoluminescence and photoluminescence properties of Mn4+, Pr3+,4+, Nd3+ and Eu3+ in MgAl2Si2O8

Recent advances and prospects of persistent luminescent materials as inner secondary self-luminous light source for photocatalytic applications

“…In RE-doped MPLs, the persistent luminescence mainly originates either from d-f transition RE ions (i.e., Eu 2+ , and Ce 3+ ) [31, 33-34, 42, 44, 49, 57, 60-106], well-shielded 4f (e.g., Eu 3+ , Pr 3+ , Tb 3+ , Sm 3+ , Tm 3+ , Gd 3+ , and Dy 3+ ) [35-37, 51-52, 107-142], or from the coupling arrangements of these RE ions [33-34, 38, 42, 44, 52, 57, 64, 67-69, 72-77, 79-82, 85-89, 92-94, 96-99, 101, 103, 105-107, 118, 120, 125, 127, 134]. Besides, with the purposes of creating the defects, modifying the trap depths, or constructing the energy transfer paths, the non-RE (e.g., Bi 3+ [91,130,141], Mn 2+ [90,92], Cr 3+ [40,56,84,87]), or some of other RE (e.g., Nd 3+ [49,61,[70][71]142], Pr 3+ [38,56,98,101,107], Ho 3+ [95,125] etc) are also often used as the co-dopants for RE-doped MPLs.…”

“…Previous research works dedicated to TM-doped MPLs mostly concern 3d ions like Mn 4+ [142,[151][152][153][154][155][156][157], Cr 3+ [39,[55][56], and Mn 2+ (Table 3) [53,90,92,194,. Among them, Mn 4+ -doped MPLs are still undeveloped, the number and type of which are limited.…”

“…Generally, in an oxidic environment, exciting with the UV and visible light, the Mn 4+ MPLs exhibit an excitation range broadly covering the whole UV and part of the visible light (usually ≤ 550), but a relatively fixed and narrow persistent spectral band in the range of 600-800 nm (Figure 4). In many reports [142,[150][151][152][153][154][155]157], the red Mn 4+ luminescence is also referred to the NIR or deep red, because its emission range (or part of the emission wavelength) falls precisely in the NIR optical window (i.e., 650-1350 nm). Because of the site occupancy preferential issue or the crystal field strength change, however, the Mn 4+ enables showing different dominant emission positions (Figure 4a(iii-iv)), but basically sustains in the range of 600-800 nm, allowing the persistent range of Mn 4+ -doped MPLs to match those PCMs with the absorption wavelength larger than 600 nm.…”

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…The main peaks were shied towards the lower temperature region when the phosphors were exposed to a-irradiation. [144][145][146][147] The TL curves of the band a-irradiated phosphors exhibited substantial changes, which can be associated with the type of radiation. Therefore, the TL peak positions of MgAl 2 Si 2 O 8 :Mn 4+ with codoping La 3+ , Gd 3+ , Dy 3+ , and Ho 3+ activators did not change for aand b-irradiation.…”