UV-light activated blue-emitting persistent luminescence of CaYGaO4:Bi3+ suitable for high-temperature environment

Prolonged Red Persistent Luminescence in Bi3+ Single-Doped LiGa5O8: Regulating Traps by Site Selective Occupation

“…Figure b depicts the integral area ratios of A 718nm / A 511nm and A 718nm /( A 511nm + A 718nm ) I 511nm and I 718nm for the PersL performance of LiGa 5 O 8 : x % Bi 3+ as a function of Bi 3+ concentration. Obviously, the fluctuations of the ratios are similar to the PL spectra shown in Figure d, confirming that Bi 3+ serves as the luminescent center in LiGa 5 O 8 : x % Bi 3+ materials, determining the color of PersL . The possibility for NIR PersL induced by Bi 2+ ions via a light-induced charge transfer process is impossible because such a strong red PersL could not be generated without continuous excitation of UV light, further demonstrating the special site occupation of Bi 3+ in different polyhedra with a small coordination number (≤6) and short bond length …”

“…Obviously, the fluctuations of the ratios are similar to the PL spectra shown in Figure 2d, confirming that Bi 3+ serves as the luminescent center in LiGa 5 O 8 :x% Bi 3+ materials, determining the color of PersL. 46 The possibility for NIR PersL induced by Bi 2+ ions via a light-induced charge transfer process is impossible because such a strong red PersL could not be generated without continuous excitation of UV light, further demonstrating the special site occupation of Bi 3+ in different polyhedra with a small coordination number (≤6) and short bond length. 47 Additionally, the duration as an important measure of PersL performance is also investigated.…”

Utilizing diametrically opposite thermal quenching luminescence to achieve highly sensitive temperature measurement and anti-counterfeiting

“…1a together with the calculated XRD pattern of CYGO (based on the parameters of the crystal structure). 27 It can be seen in Fig. 1a that all diffraction peaks are much well indexed to the phase of CYGO, which implies that the as-synthesized phosphors possess high purity and crystallinity.…”

Luminescence–structure relationships in solids doped with Bi3+

“…The perspectives, in this concern, are real, as demonstrated by the increasing desire for Bi 3+ -doped compounds applicable in e.g. lighting, 230–234 persistent luminescence, 235–238 anti-counterfeiting 239–242 or optical thermometry. 243–249…”