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Temperature dependent phonon evolutions and optical properties of highly c-axis oriented CuGaO2 semiconductor films grown by the sol-gel method
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10.1063/1.3641477
/content/aip/journal/apl/99/13/10.1063/1.3641477
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/13/10.1063/1.3641477

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) The XRD pattern of the CuGaO2 film on the c-plane sapphire substrate, and the inset shows the FWHM of the (006) diffraction peak, (b) AFM surface morphology, and (c) cross-sectional SEM image of the CuGaO2 film.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Raman spectra of the CuGaO2 film recorded at different temperatures from 85 to 873 K. Note that the label “*” indicates the substrate’s phonon modes. The temperature dependent of (b) frequency and (c) FWHM of the experimental data (dot lines) and the corresponding theoretical fitting (solid lines) for the A1 g phonon mode.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Transmittance spectra of the CuGaO2 film with different temperature, (b) the experimental (dotted curves) and fitting (solid curves) transmittance spectra at 8 and 300 K, (c) real (ɛ 1) and imaginary (ɛ 2) parts of the dielectric constants of the CuGaO2 film at 8 and 300 K, and (d) the temperature dependence of the OBG (dot curve) and Bose-Einstein model fitting result (solid curve).

Tables

Generic image for table
Table I.

The Tauc-Lorentz parameter values of the CuGaO2 film are determined from the simulation of transmittance spectra at 8, 150, 300K. Note that Aj , Epj , Γ j , and Eoj are the amplitude, peak position energy, broadening term, and Tauc gap energy of the oscillator, respectively.

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/content/aip/journal/apl/99/13/10.1063/1.3641477
2011-09-26
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temperature dependent phonon evolutions and optical properties of highly c-axis oriented CuGaO2 semiconductor films grown by the sol-gel method
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/13/10.1063/1.3641477
10.1063/1.3641477
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