Photoelectric emission from thin films in the vacuum-ultraviolet region. Final report

Technical Report · Mon Sep 01 04:00:00 EDT 1980

OSTI ID:7062857

Pong, W

In this final report, we summarize the results of our photoemission studies of thin films. The objectives of the investigation have been to determine: (1) the location of density-of-states structure of the valence and conduction bands; (2) the band thresholds of the core and valence bands relative to the vacuum level; (3) the electron attenuation length for low-energy electrons in solids. Most of the experimental effort was confined to the measurements of photoemission from thin films in the photon energy range 7 to 27 eV. These studies have led to a better understanding of the electronic structure of ionic insulators and semiconductors. The valence-band widths as seen in the photoelectron spectra were compared with the results of band structure calculations, and good agreement was found for calculations including correlation effects. The observed band thresholds and location of density-of-states structure were shown to be useful in clarifying the interpretation of data from other measurements such as optical, electron energy loss, x-ray emission and photoemission. The photoemission studies also contributed results related to electron scattering in solids. A new technique of measuring the electron attentuation length was developed. The results of this effort stimulated further work involving organic semiconductors. In addition, the results were found to be useful in the development of ultraviolet photoelectron microscopy of biological surfaces.

• Research Organization: Hawaii Univ., Honolulu (USA)
• DOE Contract Number: AT03-76ER70009
• OSTI ID: 7062857
• Report Number(s): DOE/ER/70009-T1; ON: DE83002615
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CESIUM BROMIDES
CESIUM COMPOUNDS
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
DYES
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION
FAR ULTRAVIOLET RADIATION
FILMS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INORGANIC PHOSPHORS
LANTHANUM COMPOUNDS
LANTHANUM FLUORIDES
LEAD COMPOUNDS
LEAD TELLURIDES
LUTETIUM CHLORIDES
LUTETIUM COMPOUNDS
MATERIALS
METALS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NIOBIUM OXIDES
NITRIDES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORS
PHOTOEMISSION
PHTHALOCYANINES
PNICTIDES
RADIATIONS
RARE EARTH COMPOUNDS
RUBIDIUM CHLORIDES
RUBIDIUM COMPOUNDS
RUBIDIUM FLUORIDES
SECONDARY EMISSION
SEMICONDUCTOR MATERIALS
SOLIDS
SULFIDES
SULFUR COMPOUNDS
TELLURIDES
TELLURIUM COMPOUNDS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN
ULTRAVIOLET RADIATION
VALENCE