Photoemission characterization of the H sub 2 plasma-etched surface of CdS

Journal Article · Tue Dec 15 04:00:00 EST 1992 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.351894· OSTI ID:7048656

Nelson, A J ^[1]; Frigo, S P ^[2]; Rosenberg, R ^[3]

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1. National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401 (United States)
2. Synchrotron Radiation Center, University of Wisconsin-Madison, 3731 Schneider Drive, Stoughton, Wisconsin 53589 (United States)
3. Argonne National Laboratory/Advanced Photon Source, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

The effects of H{sub 2} plasma exposure of CdS as a function of substrate temperature was studied by synchrotron radiation soft x-ray photoemission spectroscopy and optical emission spectroscopy. The low-power H{sub 2} plasma was generated with a commercial electron cyclotron resonance plasma source using pure H{sub 2} with the plasma exposure being performed at ambient temperatures of 100 and 200 {degree}C. Plasma species were identified with optical emission spectroscopy. {ital In} {ital situ} photoemission measurements were acquired after each plasma exposure in order to observe changes in the valence-band electronic structure as well as changes in the Cd 4{ital d} and S 2{ital p} core lines. The results were correlated in order to relate the plasma species and characteristics to changes in surface chemistry and electronic structure. These measurements indicate that the H{sub 2} plasma exposure type converts the CdS surface to an {ital n}-type surface and that the magnitude of the band bending is dependent on substrate temperature during plasma exposure.

• DOE Contract Number: AC02-83CH10093
• OSTI ID: 7048656
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 72:12; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
BREMSSTRAHLUNG
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
EMISSION
ETCHING
PHOTOEMISSION
PLASMA DIAGNOSTICS
RADIATIONS
SECONDARY EMISSION
SELENIDES
SELENIUM COMPOUNDS
SURFACE FINISHING
SURFACE PROPERTIES
SYNCHROTRON RADIATION