TY - JOUR
T1 - Electronic structure of chromium-containing amorphous hydrogenated carbon thin films studied by X-ray absorption spectroscopy
AU - Cheng, Hsin Yen
AU - Chiou, Jau Wern
AU - Ting, Jyh Ming
AU - Chen, Jin Ming
AU - Lee, Jyh Fu
AU - Tzeng, Yonhua
N1 - Funding Information:
The authors acknowledge the National Science Council of Taiwan for financial support under Grant Nos. NSC 99-2112-M-390-004-MY3 , NSC 96-2628-E-006-014-MY3 and NSC 99-2120-M-006-004 .
PY - 2013/1/1
Y1 - 2013/1/1
N2 - C K-, Cr L 3.2 -, and K-edge X-ray absorption near-edge structure (XANES) analysis, high-resolution transmission electron microscopy examination, and optical absorptance have been examined to obtain a correlation between the optical absorptance and electronic structure of chromium-containing amorphous hydrogenated carbon thin films (a-C:H/Cr) deposited using a dc magnetron sputter deposition technique. It was found that the C 2pCr 3d hybridization gradually increases as the Cr nanoparticle (NP) size decreases, accompanied by a C 2p interband transition. The amount of CH bonding and the change in crystalline structure are the main factors affecting the optical absorptance of the thin films. The size of the Cr NP affects the absorption wavelength range of the films. The optical absorptance and C K-edge XANES spectra indicate that a decrease in the size of Cr NP raises the conduction-band-minimum and may also increase the bandgap.
AB - C K-, Cr L 3.2 -, and K-edge X-ray absorption near-edge structure (XANES) analysis, high-resolution transmission electron microscopy examination, and optical absorptance have been examined to obtain a correlation between the optical absorptance and electronic structure of chromium-containing amorphous hydrogenated carbon thin films (a-C:H/Cr) deposited using a dc magnetron sputter deposition technique. It was found that the C 2pCr 3d hybridization gradually increases as the Cr nanoparticle (NP) size decreases, accompanied by a C 2p interband transition. The amount of CH bonding and the change in crystalline structure are the main factors affecting the optical absorptance of the thin films. The size of the Cr NP affects the absorption wavelength range of the films. The optical absorptance and C K-edge XANES spectra indicate that a decrease in the size of Cr NP raises the conduction-band-minimum and may also increase the bandgap.
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U2 - 10.1016/j.apsusc.2012.09.172
DO - 10.1016/j.apsusc.2012.09.172
M3 - Article
AN - SCOPUS:84870486861
SN - 0169-4332
VL - 264
SP - 202
EP - 206
JO - Applied Surface Science
JF - Applied Surface Science
ER -