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SM ISO690:2012 LEVCENKO, Sergiu, DURÁN, Larissa T., GURIEVA, Galina, ALONSO, Maria Isabel, ARUSHANOV, Ernest, DURANTE RINCÓN, Carlos Alberto, LEON, Maximo. Optical constants of Cu(In1-xGax)5Se 8 crystals. In: Journal of Applied Physics, 2010, vol. 107, pp. 1-7. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.3298499 |
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Journal of Applied Physics | |
Volumul 107 / 2010 / ISSN 0021-8979 /ISSNe 1089-7550 | |
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DOI:https://doi.org/10.1063/1.3298499 | |
Pag. 1-7 | |
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Rezumat | |
Spectroscopic ellipsometry has been used to characterize the dielectric functions of bulk Cu(In1-xGax)5Se8 crystals. Spectra were measured at room temperature over the energy range 0.74-5.2 eV. The dielectric functions as well as the complex refractive index, the absorption coefficient, and the normal-incidence reflectivity have been modeled using a modification of the Adachi model. The results are in a good agreement with the experimental data over the entire range of photon energies. The model parameters (strength, threshold energy, and broadening) have been determined using the simulated annealing algorithm. The transition energies E0 and E1A are found to shift linearly to higher energies as the gallium content increases. |
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Cuvinte-cheie Engineering controlled terms Crystals, gallium, Optical constants, refractive index, Spectroscopic ellipsometry Engineering uncontrolled terms Absorption coefficients, Complex refractive index, Dielectric functions, Energy ranges, Experimental data, Model parameters, Photon energy, Room temperature, Simulated annealing algorithms, Threshold energy, Transition energy Engineering main heading Simulated annealing |
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