The present disclosure composite film, preparation method thereof and light-emitting device. A composite film, includes X layers of first film and Y layers of second film alternately stacked, wherein X is an integer 1 and Y is an integer 1. A material of the first film includes inorganic nanoparticle, and a material of the second film includes inorganic metal compound. The composite film provided by the present disclosure has good bending resistance.

The present disclosure composite film, preparation method thereof and light-emitting device. A composite film, includes X layers of first film and Y layers of second film alternately stacked, wherein X is an integer 1 and Y is an integer 1. A material of the first film includes inorganic nanoparticle, and a material of the second film includes inorganic metal compound. The composite film provided by the present disclosure has good bending resistance.

A composition can include a copper containing nanocrystal.

A composition can include a copper containing nanocrystal.