Temperature dependence of the luminescence of GSGG:Cr3+

Sol-gel synthesized far-red chromium-doped garnet phosphors for phosphor-conversion light-emitting diodes that meet the photomorphogenetic needs of plants

“…10, which shows that the spectral power becomes higher as the ambient temperature is increased. Similar results were reported by others [23,35].…”

“…Table 2 also presents PL decay times for YGG:Cr and GSGG:Cr. These decay times were found to be in the submillisecond range and are comparable to the results obtained for crystalline samples [23,32,35]. In [23], the PL decay time dependence on ambient temperature was also presented, showing that for lower temperatures the decay times become larger.…”

Temperature dependent Cr3+ photoluminescence in garnets of the type X3Sc2Ga3O12 (X = Lu, Y, Gd, La)

“…The shortening of the lifetime cannot be due to a non-radiative quenching of the Cr 3+ photoluminescence, since the emission intensity remains constant over the same temperature range. The strong reduction of the decay time is related to much higher decay rate of the spin-allowed 4 T 2 → 4 A 2 transition, which appears due to the increased equilibrium population in the 4 T 2 state at higher temperatures [48].…”

Temperature dependent luminescence Cr3+-doped GdAl3(BO3)4 and YAl3(BO3)4

“…Additionally, at low temperatures, where only 2 E g level is occupied, the decay rate of 2 E g -4 A 2g determines the lifetime. The reduction of the lifetime at higher temperatures results from the much higher decay rate of the 4 T 2g -4 A 2g transition, which appears due to the increased equilibrium population in the 4 T 2g state [46].…”