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Partial replacement of K+ by Sr2+ in Eu-doped K-beta-alumina changes the trap content and structural rigidity, which facilitates the variation from anti-thermal quenching to zero thermal quenching within 150 °C.

Poor water stability is the main problem of commercialized Mn4+-doped fluorides for white light emitting diode (WLED) application. This work proposes a surface engineering strategy to rebuild a Mn4+-free fluoride shell on fluorides to effectively resist the destruction from water molecules. By simple processing using glyoxylic acid (GA) solution, the moisture resistance of the red-emitting fluorides can be significantly improved. The photoluminescence (PL) quantum efficiency (QE) of the surface-engineered K2SiF6:Mn4+ (KSFM-GA) still maintain 98.43% after water immersion for 360 h, in sharp contrary to the untreated one (its PLQE decreases to 59.79%). Additionally, PL intensity of the hydrolysed KSFM can be recovered to 99.1% through the treatment of the reducing GA solution. By using the high-stability KSFM-GA red phosphor, the as-fabricated high-performance warm-WLED device can still maintain 84.6% in luminous efficacy, higher than that (79.6%) with the untreated KSFM, after 500 hours of aging in a high temperature (85 oC) and high humidity (85%) environment.

A self-reduction strategy realizes singly Mn2+-doped BaXP2O7 (X = Mg/Zn) red phosphors with anti-thermal quenching performance, which have promising applications in warm WLED or plant growth lighting.

Partial self-reduction leads to Eu2+/3+ co-doped BaMgP2O7 phosphor, which has a multiplicity of applications including X-ray detection, multi-level anti-counterfeiting, and optical thermometry due to the multi-stimuli responsive dynamic luminescence.

We have proposed a general self-template hydrothermal route for preparing a series of porous ATiO3 (A = Ca, Sr, or Ba) submicrospheres. The obtained porous SrTiO3 hollow spheres showed the highest photocatalytic performance on methylene blue.

Correction for ‘Achieving highly thermostable red emission in singly Mn2+-doped BaXP2O7 (X = Mg/Zn) via self-reduction’ by Song Li et al., Inorg. Chem. Front., 2022, 9, 3224–3232, https://doi.org/10.1039/D2QI00539E.

Discovery of highly efficient and thermal stable phosphors is a major topic in phosphor-converted white light-emitting diodes (LEDs). A highly efficient and zero-thermal quenching blue-emitting phosphor is realized in nominal Km-0.4Al11O17+δ:0.2Eu2+, which benefits from rigid aluminate structure with space group P63/mmc and the introduction of trap energy levels. The internal and external quantum efficiencies of optimal nominal K1.6Al11O17+δ:0.2Eu2+ are 97.1% and 61.8%, respectively. The phosphor exhibits zero-thermal-quenching behavior within 150 °C. Further increasing K content results in even better thermal stability, however, lower quantum efficiency. The relationship between luminescence properties and crystal structure was discussed. Results suggest that the blue-emitting phosphor is a candidate for white phosphor-converted LEDs based on near-UV or violet chip.

A series of ZnS:KBr,x%Mn2+ (x = 0–0.25) phosphors with dynamic multicolor luminescence are obtained by simultaneously constructing strong host luminescence and heterochromatic doping emissive center in ZnS lattice. Under a fixed ultraviolet irradiation, the phosphors emit tunable colors ranging from cyan to yellow-orange with increasing x values gradually. Besides, those Mn2+-doped phosphor (x > 0) emits different colors under different UV excitations. After removal of the UV lamp, all ZnS:KBr,Mn2+ phosphors exhibit an orange afterglow that is different from its photoluminescence (PL) color. The dynamic PL and afterglow is associated with the interactions between two PL centers and traps in the material. Therefore, spatially and temporally resolved dynamic multicolor luminescence is realized by tuning doping concentration, excitation wavelength, and observation time, which features the ZnS:KBr,Mn2+ phosphors a great application potential in high-level secure anti-counterfeiting.