MIXED LAYER, METHOD OF PREPARING THE MIXED LAYER, LIGHT-EMITTING DEVICE, AND ELECTRONIC APPARATUS

A mixed layer including: a matrix material; and a dopant composition, wherein the dopant composition is doped in the matrix material, the dopant composition comprises a first dopant and a second dopant, an amount by weight of the matrix material is greater than an amount by weight of the dopant composition in the mixed layer, the matrix material, the first dopant, and the second dopant are different from each other, the matrix material does not include a transition metal, the first dopant includes a transition metal, the mixed layer is a layer formed by deposition of the matrix material, the first dopant, and the second dopant, the mixed layer has a concentration profile of the dopant composition with respect to a thickness of the mixed layer, provided that Tm1>Tp>Tm1+2 is satisfied, wherein Tm1, Tp, and Tm1+2 are respectively as described herein.