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Quantum dots (QDs) function as photon sensitizers in photoelectrocatalysis (PEC), enhancing the ability of bulk materials to harness a broad spectrum of photon energy. Through precise engineering, QDs facilitate the development of advanced strategies to synthesize high-performance photoelectrodes that improve the efficiency of light-driven technologies. This review highlights valuable insights in integrating QDs into PEC systems, focusing on heterojunction-mediated charge transfer. We explore their unique optoelectronic properties, the enhancement of conventional photoanodes and photocathodes, and strategies to optimize interfacial charge transfer dynamics for efficient photon-to-energy conversion. Finally, we discuss the advantages, limitations, and future prospects of QD-based PEC technology. Quantum dots (QDs) can improve the ability of bulk photocatalysts to harness a broad spectrum of photon energies, but their integration into electrodes for photoelectrocatalysis (PEC) is challenging and remains the subject of ongoing research. In this Review, the authors highlight the role of QDs in PEC systems and discuss their implementation for the design of next-generation photoelectrodes with superior light-harvesting ability and efficient charge transfer at solid–liquid interfaces.
Castillo-Cabrera et al. (Thu,) studied this question.