Surface Engineering of Graphene Quantum Dots Toward Efficient Photoluminescence
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Graphene quantum dots (GQDs), a novel class of graphene nanomaterials typically characterized by sizes below 10 nm, are emerging as promising candidates for next-generation luminescent materials. Here, we present a strategy for enhancing the photoluminescence (PL) properties of GQDs through surface engineering techniques, including embedding the GQDs within an optimally designed matrix material and surface functionalization with various molecules to prevent aggregation-caused quenching (ACQ). The PL enhancement achieved by these methods can be attributed to the increased inter-GQD distance and the number of emitted photons due to local-field effects. A comprehensive collection of experimental and simulation results demonstrates that surface engineering of GQDs is crucial for enhancing PL properties and achieving successful optical applications.