The present disclosure discloses a quantum-dot display substrate, a method for preparing the same, and a display panel. The quantum-dot display substrate includes a substrate and a plurality of light emitting sub-pixels disposed on the substrate, in which each of the light emitting sub-pixels includes a quantum-dot light emitting layer, and the quantum-dot light emitting layer includes a crosslinked network formed by crosslinking quantum dots having a crosslinkable ligand with a crosslinking agent.

A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.

The present disclosure provides a red phosphor represented by formula (1):
(x-a-b)MgO.aM.sup.1O.bM.sup.2O.sub.1.5.yMgF.sub.2.fM.sup.6X.sub.2.(1-g)GeO.sub.2.gM.sup.7O.sub.1.5:zMn.sup.4+(1)
where x, y, z, a, b, f, and g satisfy 1.144<x11.0, 0<y<1.597, 0<z<0.1, 0<a<1.0, 0b1.0, 0<f2.0, 0g<0.484, 1.144<(x-a-b), and b and g satisfy b+g0; M.sup.1 is at least one element selected from the group consisting of Ca, Sr, Ba, and Zn; M.sup.2 is at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; M.sup.6 is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M.sup.7 is at least one element selected from the group consisting of B, Al, Ga, and In; and X is at least one element selected from the group consisting of F, Cl, Br, and I, and M.sup.6X.sub.2 is other than MgF.sub.2.

A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.

A composite material includes at least one photoluminescent material embedded as a light source in a transparent matrix, wherein a refractive index (n.sub.P) of the at least one photoluminescent material and a refractive index (n.sub.M) of the matrix differ by at most 0.2.

A luminescent substance particle includes BaSnO.sub.3:Zn having a perovskite-type structure, a content of Zn (zinc) being more than 0.0% by mass and less than 8.0% by mass. Alternatively, a luminescent substance particle includes BaSnO.sub.3:Mg having a perovskite-type structure, a content of Mg (magnesium) being more than 0.0% by mass and less than 0.1% by mass.

Compositions are generally provided that include an oxyfluoride compound. In one embodiment, the oxyfluoride compound has the formula: NaCa.sub.2xA.sub.xGeO.sub.4zF.sub.1yN.sub.z where A is Ba, Sr, or a mixture thereof; 0.01x0.1; 0y0.2; and 0z0.1. Methods of forming such compounds are also generally provided.

A nanocrystal composition can include a nanocrystal and an outer layer including a ligand bound to the nanocyrstal, wherein the ligand includes a norbornene group and a carboxyl group.

Present invention provides a process for the synthesis of size and composition tunable colloidal PbMgS core and PbMgS/MS core shell quantum dots emitting in the near infrared (NIR) region of the spectrum in a single operation in a continuous flow reactor. M includes at least one of Cd, Mg, Zn and Cu metals.

The deep red light-emitting magnesium fluorogermanate phosphor prepared by calcining a mixture comprising a fine magnesium oxide powder having a BET specific surface area in the range of 5-200 m.sup.2/g, a fluorine compound, a germanium compound and a manganese compound gives a light emission having a maximum peak of increased strength in the wavelength region of 640-680 nm upon excitation with a light having a wavelength of 400 nm.