CdSe Quantum Dots Supported on Sb2S3 Nanorods as S-Scheme Heterojunction Photoanode in Photoelectrochemical Cells
Source abstract
Abstract
The narrow bandgap semiconductor Sb 2 S 3 has been extensively utilized in solar cells for its impressive light absorption coefficient and carrier mobility. However, a large number of deep energy defects provide carrier recombination sites that limit its photoelectrochemical (PEC) performance. In this study, Sb 2 S 3 nanorods (NRs) and CdSe quantum dots (QDs) were successfully prepared, and Sb 2 S 3 /CdSe-annealed quasi-one-dimensional heterojunction photoanodes with the S-scheme were constructed. The Sb 2 S 3 /CdSe-annealed composite photoelectrode achieves a 12 times increase in photocurrent density compared to the 0.4 mA cm –2 of the Sb 2 S 3 photoelectrode. Overall, the synergistic effect of the [hk1]-oriented Sb 2 S 3 NRs and the S-scheme heterojunction promotes carrier transport, achieving a spatial separation of photogenerated carriers and efficiently weakening the recombination of the electron–hole pair. This study provides a simple method for the low-cost development of Sb 2 S 3 NRs with [hk1] orientation and an idea to enhance its development in the PEC water splitting direction.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics, Northwest University, Xi’an 710127, PR China
State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi’an 710119, PR China
School of Chemical Engineering, Northwest University, Xi’an 710127, PR China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Shaanxi Province · State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences
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