Kelvin Probe Force Microscopy Reveals Spatially Resolved Charge‐Transfer Mechanism in CdS/BiOBr S‐scheme Heterojunction Photocatalyst
China University of Geosciences · China University of Geosciences (Beijing) · +2 more institutions
Abstract
Abstract S‐scheme heterojunctions hold great promise for photocatalysis, yet a comprehensive understanding of their charge‐transfer mechanisms remains limited. While time‐resolved techniques have provided valuable insights, the spatial resolution of charge transfer at the material surface remains underexplored. Here, we employ Kelvin probe force microscopy (KPFM) to investigate the charge‐transfer dynamics in S‐scheme heterojunctions, revealing spatially resolved details. Our findings show that upon illumination, the Fermi level ( E f ) of n‐type semiconductors increases, but a built‐in electric field (IEF) persists within the heterojunction. Electrons accumulate on the surface of the reduction semiconductor…
Citation impact
- FWCI
- 51.56
- Percentile
- 100%
- References
- 67
Authors
7- ZMZheng Meng
China University of Geosciences, China University of Geosciences (Beijing)
- JZJianjun Zhang
China University of Geosciences, China University of Geosciences (Beijing)
- HLHaoyu Long
China University of Geosciences, China University of Geosciences (Beijing)
- HGHermenegildo Garcı́a
Instituto de Tecnología Química, Universitat Politècnica de València
- LZLiuyang Zhang
China University of Geosciences, China University of Geosciences (Beijing)
Topics & keywords
- Heterojunction
- Semiconductor
- Kelvin probe force microscope
- Surface photovoltage
- Materials science
- Optoelectronics
- Charge (physics)
- Photocatalysis