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To study the electronic and optical effects of amorphous carbon (a-C) films with different sp3/sp2 hybridization ratio, five amorphous carbon models with gradient changes of density are established. Work function, band structure, dielectric function, complex refractive index, absorption coefficient, reflectivity and loss function have been calculated and analyzed based on first principles. The results...
Thermally enhanced photoelectric emission (TEPE) is a new proposed mechanism to improve solar cell efficiency at low temperatures (< 400K). In this paper, the mechanism of TEPE phenomenon is discussed based on the transmission-mode GaAs photocathode with exponential-doping structure. Parameters varying with temperature are quantitatively studied in the photoelectric emission process, such as diffusion...
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