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1990

Iowa State University

Chromium

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Photoemission Study Of Cr On A-Si:H, Tun-Wen Pi, C. G. Olson, David W. Lynch Nov 1990

Photoemission Study Of Cr On A-Si:H, Tun-Wen Pi, C. G. Olson, David W. Lynch

Physics and Astronomy Publications

We report a synchrotron-radiation photoemission study of Cr evaporated on rf-sputtered a-Si:H at room temperature. The evolution of the interface qualitatively follows that on c-Si, despite differences in the valence-band emission. The interface begins with an inactive layer (≤1 Å) of Cr, followed by an intermixed Cr/a-Si:H layer (≤12 Å). With further Cr deposition, bulklike Cr metal begins to develop on top of these. Some features exhibited by the Cr/a-Si:H interface are specific to a-Si:H surfaces. For instance, Cr adatoms are found around the dangling-bond neighborhood at coverages below ...