1 results match your criteria: "Institute of Radiation Physics (ELBE)[Affiliation]"
Influence of surface carbon on the performance of cesiated p-GaN photocathodes with high quantum efficiency.
Sci Rep
February 2023
Institute of Radiation Physics (ELBE), Helmholtz Zentrum Dresden Rossendorf, Dresden, Germany.
Article Synopsis
- This study investigates how residual carbon on p-GaN photocathodes affects their quantum efficiency, emphasizing the importance of a clean surface for achieving negative electron affinity.
- The research utilizes an in-situ X-ray photoelectron spectrometer (XPS) to monitor changes on the photocathode surface during cleaning, activation, and degradation processes.
- Despite the presence of carbon and oxygen contaminants from the manufacturing process, activating p-GaN with cesium allows for the formation of negative electron affinity and reveals the role of cesium carbide in photocathode performance degradation.