Light-emitting device having light-emissive particles partially coated with intensity-enhancement material

A structure comprising:

• a plate;
• a light-emissive region overlying light-transmissive material of the plate and comprising a plurality of light-emissive particles each having an outer surface;
• and
• a multiplicity of intensity-enhancement coatings allocated into m groups respectively comprising a group of first intensity-enhancement coatings through a group of mth intensity-enhancement coatings where m is a plural integer, each first coating generally conformally overlying part of the outer surface of a corresponding different one of the light-emissive particles so as to be spaced apart from where that light-emissive particle is closest to the plate, each ith coating generally conformally overlying a corresponding different one of the (i−1) th coatings so as to overlie part of the outer surface of the corresponding light-emissive particle and thereby be spaced apart from where that light-emissive particle overlies the plate, i being an integer varying from 2 to m, each first coating being of lower average refractive index than the corresponding light-emissive particle, each ith coating being of lower average refractive index than the corresponding (i−1) th coating.