Engineered Environment-Friendly Colloidal Core/Shell Quantum Dots for High-Efficiency Solar-Driven Photoelectrochemical Hydrogen Evolution

Autor: Zhihang Long, Xin Tong, Rui Wang, Ali Imran Channa, Xin Li, Yimin You, Li Xia, Mengke Cai, Hongyang Zhao, Zhiming M. Wang
Rok vydání: 2022
Předmět:
Zdroj: ChemSusChem. 15(10)
ISSN: 1864-564X
Popis: "Green" colloidal quantum dots (QDs)-based photoelectrochemical (PEC) cells are promising solar energy conversion systems possessing environmental friendliness, cost-effectiveness, and highly efficient solar-to-hydrogen conversion. In this work, eco-friendly AgInSe (AISe)/ZnSe core/shell QDs with wurtzite (WZ) phase were synthesized for solar hydrogen production. It was demonstrated that appropriately engineering the ZnSe shell thickness resulted in effective surface defects passivation of the AISe core for suppressed charge recombination in the consequent core/shell AISe/ZnSe QDs. The fabricated environmentally friendly core/shell QDs-based PEC device exhibited improved photo-excited electrons extraction efficiency under optimized conditions and delivered a maximum photocurrent density as high as 7.5 mA cm
Databáze: OpenAIRE