Graphene Quantum Dot‐Protected Cadmium Selenide Quantum Dot‐Sensitized Photoanode for Efficient Photoelectrochemical Cells with Enhanced Stability and Performance

Graphene quantum dots (GQDs) are applied as an inexpensive and efficient hole transporter/extractor to improve the stability in cadmium selenide (CdSe) quantum dot-based photoelectrochemical systems. By depositing GQDs on CdSe QD-based electrodes, photochemical stability and photocurrent density are greatly enhanced, showing the visible working capability.