Journal Article photoluminescence Cu electrodes Pt-octaethylporphyrin Research Support, Non-U.S. Gov't electrical confinement electrically driven devices electroluminescence focused ion beams glass graphene graphene oxide quantum dot graphene quantum dot graphite nanoparticels interface chemistry light‐emitting transistor luminescence quenching and electrical isolation maskless and etching-free pixelation monolayer neutral exciton paper photonic cavity integration photonic crystals physical interlocking quantum dots quantum light sources semiconductor lasers semiconductor quantum dots sensors single photon sources