Composition, patterned film, and electronic device including the same

A patterned film comprising

• a repeating section comprising a first section, the first section being configured to emit a first light,
• wherein the first section comprises a quantum dot polymer composite,
• the quantum dot-polymer composite comprises
• a polymer matrix comprising
• a dispersing agent,
• a polymerization product of a photopolymerizable monomer comprising a carbon-carbon double bond, and
• optionally a polymerization product of the photopolymerizable monomer and a multiple thiol compound comprising at least two thiol groups at a terminal end of the multiple thiol compound;
• and
• a first quantum dot dispersed in the polymer matrix and configured to emit the first light,
• the first quantum dot comprises
• a seed comprising a first semiconductor nanocrystal,
• a quantum well comprising a second semiconductor nanocrystal, the quantum well surrounding the seed and
• a shell disposed on the quantum well, the shell comprising a third semiconductor nanocrystal and not comprising cadmium,
• the second semiconductor nanocrystal has a different composition from each of the first semiconductor nanocrystal and the third semiconductor nanocrystal,
• an energy bandgap of the second semiconductor nanocrystal is smaller than an energy bandgap of the first semiconductor nanocrystal and an energy bandgap of the third semiconductor nanocrystal, and
• the first quantum dot does not comprises cadmium.