High Kinetic Energy Photoelectron Spectroscopy /KMC-1

The High Kinetic Energy Photoelectron Spectrometer (HiKE) instrument at the double-crystal monochromator KMC-1 beamline is designed for hard X-ray photoelectron spectroscopy (HAXPES) experiments using a photon excitation energy range of 2 keV to 12 keV, leading to an optimized photoelectron kinetic energy range from 150 eV to 10 keV. The beamline and experiment are under UHV-condition.

As HAXPES probes beyond a sample’s surface and toward its bulk - including buried interfaces, its increased probing depth allows for the execution of in-situ experiments mimicking conditions of treatment steps employed in the preparation of “real-world” devices such as solar cells, batteries, etc.

The technique's lower sensitivity to surface effects and contaminants allows the study of samples without particular surface treatments such as prototype systems for applications in magnetic memories, solar cells, batteries, etc.

Selected Applications:

• extended depth profiling of composition and chemical information
• characterization of buried interface chemical and electronic structures
• in-situ and in-system HAXPES studies, e.g., diffusion, order disorder transitions
• operando XAS experiments
• standing waves enhanced HAXPES

Methods

NEXAFS, XRF, HAXPES

Remote access

depends on experiment - please discuss with Instrument Scientist

The HiKE endstation is installed at the KMC-1 beamline. Typical experiments running on the HiKE endstation are investigations of bulk samples, multilayers and heterostructures where core levels and valence band are recorded, buried interfaces are accessed and spatially resolved chemical information by x-ray standing waves is recorded. In addition to HAXPES experiments the station also provides parallel access to the sample drain current (TEY) and the signal from a fluorescence detector (FY) thus enabling absorption experiments: XANES and EXAFS.