Colloidal quantum dot (QD)-based photoelectrochemical (PEC) cells are cost-effective devices showing remarkable solar-to-fuel conversion efficiency. However, the extensive use of highly toxic elements (e.g.Pb and Cd) in QDs' synthesis and device fabrication is still a major challenge towards their practical development. Herein, we fabricate a solar-driven PEC cell based on environmentally friendly Mn-alloyed CuInS2(MnCIS)/ZnS core/shell QDs, showing more favorable band alignment, efficient charge transfer, reduced charge recombination and lower charge transfer resistance with respect to the control device fabricated using unalloyed CuInS2(CIS)/ZnS core/shell QDs. An unprecedented photocurrent density of ∼5.7 mA cm−2with excellent stability was obtained for the as-fabricated MnCIS/ZnS core/shell QD-based PEC device when operated under standard one sun irradiation (AM 1.5G, 100 mW cm−2). These results indicate that the transition metal-alloyed environmentally friendly core/shell QDs are promising for next-generation solar technologies.
|Data di pubblicazione:||2020|
|Titolo:||Environmentally friendly Mn-alloyed core/shell quantum dots for high-efficiency photoelectrochemical cells|
|Rivista:||JOURNAL OF MATERIALS CHEMISTRY. A|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1039/d0ta00953a|
|Appare nelle tipologie:||2.1 Articolo su rivista |