Crystal structure refinement, photoluminescence properties and energy transfer of multicolor tunable Ca2Al2SiO7:Tm3+, Dy3+ for NUV white-light-emitting diodes

Layer-structure-suppressed concentration quenching of Dy3+ luminescence and the realization of a single phase white light-emitting phosphor cooperated with Tm3+

“…This kind of white LED has high light conversion efficiency and thermal stability, but the problems of low color rendering index (CRI = 70-80) and high correlated color temperature (CCT ∼ 7750 K) are still unsolved. 8,9 The single-phase white light-emitting phosphors, which can be well excited using a near-ultraviolet chip and have advantages, such as, stable physical/chemical properties, stable color and ideal color rendering index, [10][11][12] have been rapidly promoted in recent years. Therefore, it is a good development approach to use a single-phase white light phosphor in combination with a near-ultraviolet chip to obtain white light.…”

Color‐Tunable Single‐Phase Bi3+/Eu3+‐Activated LiCa3ZnV3O12 Luminescence Materials Based on Energy Transfer

“…[10][11][12][13] At present, a lot of work on phosphors are mainly devoted to improving the luminescence properties and designing new color tunable phosphors by changing excitation wavelength, adjusting the coordination environment around the crystal field, designing energy transfer, thermal contraction or expansion and other chemical modification means. [14][15][16][17][18] Although some achievements have been made, the fundamental role played by the host lattice in influencing the activators luminescent transition is not fully understood. Therefore, it is still challenging to accurate tune the emission colors of phosphors through the modification of the main lattice and requires an in depth discussion.…”

“…In addition, In view of the external electron exposure of 6S 2 electronic configurations of Bi 3+ ions, its luminescence properties are strongly associated with the coordination environment of the surrounding crystal field (including the lattice symmetry, coordination number, bond distance, and so on) [10–13] . At present, a lot of work on phosphors are mainly devoted to improving the luminescence properties and designing new color tunable phosphors by changing excitation wavelength, adjusting the coordination environment around the crystal field, designing energy transfer, thermal contraction or expansion and other chemical modification means [14–18] . Although some achievements have been made, the fundamental role played by the host lattice in influencing the activators luminescent transition is not fully understood.…”