Photochemical deposition of ZnS from the gas phase and simultaneous luminescence detection of photofragments from a single-source precursor, Zn(S2COCHMe2)2

Jinwoo Cheon, David Talaga, Jeffrey I. Zink

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Abstract

ZnS thin films are made by laser driven chemical vapor deposition (CVD) from a single-source precursor, Zn(S2COCHMe2)2 under vacuum conditions. Photofragments in the gas phase are identified simultaneously by luminescence spectroscopy. The laser selectively activates the initial decomposition of the precursor and drives its conversion to the desired materials under mild conditions. These photolytically produced films are compared to films made by thermal deposition from the same precursor. The deposits from both techniques, characterized by X-ray diffraction, Rutherford backscattering, and X-ray photoelectron spectroscopy, are pure stoichiometric ZnS in the hexagonal phase. Surface morphology differs in shape and granule size. During the laser-driven CVD process, gas-phase photochemical intermediates are identified by luminescence spectroscopy. The luminescent photoproducts are Zn and S2, the two elemental components of the final material. Photofragmentation mechanisms leading to ZnS, the luminescent species Zn and S2, and the gaseous organic byproducts are discussed. Further characterization of the photofragmentation pathways is provided by the trapping of the photoreaction products and by mass spectroscopy.

Original languageEnglish
Pages (from-to)163-168
Number of pages6
JournalJournal of the American Chemical Society
Volume119
Issue number1
DOIs
StatePublished - 8 Jan 1997

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Luminescence
Lasers
Gases
Spectroscopy
Chemical vapor deposition
Spectrum Analysis
Photoelectron Spectroscopy
Rutherford backscattering spectroscopy
Vacuum
X-Ray Diffraction
Surface morphology
Byproducts
Mass Spectrometry
Deposits
X ray photoelectron spectroscopy
Hot Temperature
Decomposition
X ray diffraction
Thin films

Cite this

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title = "Photochemical deposition of ZnS from the gas phase and simultaneous luminescence detection of photofragments from a single-source precursor, Zn(S2COCHMe2)2",
abstract = "ZnS thin films are made by laser driven chemical vapor deposition (CVD) from a single-source precursor, Zn(S2COCHMe2)2 under vacuum conditions. Photofragments in the gas phase are identified simultaneously by luminescence spectroscopy. The laser selectively activates the initial decomposition of the precursor and drives its conversion to the desired materials under mild conditions. These photolytically produced films are compared to films made by thermal deposition from the same precursor. The deposits from both techniques, characterized by X-ray diffraction, Rutherford backscattering, and X-ray photoelectron spectroscopy, are pure stoichiometric ZnS in the hexagonal phase. Surface morphology differs in shape and granule size. During the laser-driven CVD process, gas-phase photochemical intermediates are identified by luminescence spectroscopy. The luminescent photoproducts are Zn and S2, the two elemental components of the final material. Photofragmentation mechanisms leading to ZnS, the luminescent species Zn and S2, and the gaseous organic byproducts are discussed. Further characterization of the photofragmentation pathways is provided by the trapping of the photoreaction products and by mass spectroscopy.",
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T1 - Photochemical deposition of ZnS from the gas phase and simultaneous luminescence detection of photofragments from a single-source precursor, Zn(S2COCHMe2)2

AU - Cheon, Jinwoo

AU - Talaga, David

AU - Zink, Jeffrey I.

PY - 1997/1/8

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N2 - ZnS thin films are made by laser driven chemical vapor deposition (CVD) from a single-source precursor, Zn(S2COCHMe2)2 under vacuum conditions. Photofragments in the gas phase are identified simultaneously by luminescence spectroscopy. The laser selectively activates the initial decomposition of the precursor and drives its conversion to the desired materials under mild conditions. These photolytically produced films are compared to films made by thermal deposition from the same precursor. The deposits from both techniques, characterized by X-ray diffraction, Rutherford backscattering, and X-ray photoelectron spectroscopy, are pure stoichiometric ZnS in the hexagonal phase. Surface morphology differs in shape and granule size. During the laser-driven CVD process, gas-phase photochemical intermediates are identified by luminescence spectroscopy. The luminescent photoproducts are Zn and S2, the two elemental components of the final material. Photofragmentation mechanisms leading to ZnS, the luminescent species Zn and S2, and the gaseous organic byproducts are discussed. Further characterization of the photofragmentation pathways is provided by the trapping of the photoreaction products and by mass spectroscopy.

AB - ZnS thin films are made by laser driven chemical vapor deposition (CVD) from a single-source precursor, Zn(S2COCHMe2)2 under vacuum conditions. Photofragments in the gas phase are identified simultaneously by luminescence spectroscopy. The laser selectively activates the initial decomposition of the precursor and drives its conversion to the desired materials under mild conditions. These photolytically produced films are compared to films made by thermal deposition from the same precursor. The deposits from both techniques, characterized by X-ray diffraction, Rutherford backscattering, and X-ray photoelectron spectroscopy, are pure stoichiometric ZnS in the hexagonal phase. Surface morphology differs in shape and granule size. During the laser-driven CVD process, gas-phase photochemical intermediates are identified by luminescence spectroscopy. The luminescent photoproducts are Zn and S2, the two elemental components of the final material. Photofragmentation mechanisms leading to ZnS, the luminescent species Zn and S2, and the gaseous organic byproducts are discussed. Further characterization of the photofragmentation pathways is provided by the trapping of the photoreaction products and by mass spectroscopy.

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