A luminescent material represented by Formula 1, a method of preparing the same, and a light-emitting device including the same:
[A.sup.1.sub.nA.sup.2.sub.3][B.sub.2][X.sup.1.sub.mX.sup.2.sub.5]  Formula 1 A.sup.1, A.sup.2, B, X.sup.1, X.sup.2, n, and m in Formula 1 are as defined in the specification.

A luminescent material represented by Formula 1, a method of preparing the same, and a light-emitting device including the same:

Formula 1

[A.sup.1.sub.nA.sup.2.sub.3][B.sub.2][X.sup.1.sub.mX.sup.2.sub.5]

A.sup.1, A.sup.2, B, X.sup.1, X.sup.2, n, and m in Formula 1 are as defined in the specification.

A quantum dot may include a core including indium (In) and A.sup.1, and a first shell covering the core, wherein A.sup.1 may be a group III element other than indium, a ratio of a radius of the core to a thickness of the first shell may be in a range of about 1:1 to about 9:1, and the quantum dot may emit blue light having a maximum emission wavelength in a range of about 440 nanometers (nm) to about 480 nm.

Provided are a wireless and battery-free touch-responsive luminescent fiber and a preparation method and use thereof. The wireless and battery-free touch-responsive luminescent fiber includes a conductive core layer, a dielectric layer and a light-emitting layer sequentially from inside to outside, wherein the conductive core layer is a conductive fiber material; the dielectric layer is a first composite resin containing a high dielectric constant filler, the high dielectric constant filler having a dielectric constant of 10-80; and the light-emitting layer is a second composite resin containing a rare earth luminescent material. The preparation method includes steps of subjecting the conductive core layer to fiber pay-off, dielectric layer slurry impregnation, first heating, light-emitting layer slurry impregnation and second heating in sequence to obtain the wireless and battery-free touch-responsive luminescent fiber.