TY - JOUR
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 S.
AU - Zink, Jeffrey I.
PY - 1997/1/8
Y1 - 1997/1/8
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.
UR - http://www.scopus.com/inward/record.url?scp=0031059250&partnerID=8YFLogxK
U2 - 10.1021/ja9625891
DO - 10.1021/ja9625891
M3 - Article
AN - SCOPUS:0031059250
SN - 0002-7863
VL - 119
SP - 163
EP - 168
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 1
ER -