Microstructure Analysis and Properties of Anti-Reflection Thin Films for Spherical Silicon Solar Cells

Abstract

<p class="MsoNormal" style="text-align:justify;"> <span lang="EN-US">Structure and properties of anti-reflection thin films of spherical silicon solar cells were investigated and discussed. Conversion efficiencies of spherical Si solar cells coated with F-doped SnO₂ anti-reflection films were improved by annealing. Optical absorption and fluorescence of the solar cells increased after annealing. Lattice constants of F-doped SnO₂ anti-reflection layers, which were investigated by X-ray diffraction, decreased after annealing. A mechanism of atomic diffusion of F in SnO₂ was discussed. The present work indicated a guideline for spherical silicon solar cells with higher efficiencies.</span><span lang="EN-US"><o:p></o:p></span> </p

Hydrothermal Synthesis and Photocatalytic Property of Sn-doped β-Ga2O3 Nanostructure

“…30,31 The area of the Sn 4+ spectra was larger than that of the Sn 2+ spectra, indicating that the formation of SnO 2 was preferred to SnO due to the lower Gibbs free energy of formation of SnO 2 compared to that of SnO. 32 As the Sn concentration increased further, the Sn 2+ /Sn 4+ area ratio continued to increase, indicating that the formation of SnO was also favorable at the higher Sn concentration, as shown in Fig. 4b.…”

Monolithically interconnected lamellar Cu(In,Ga)Se2 micro solar cells under full white light concentration

“…First publications in the field of a microcell approach base on light absorbing materials like silicon or gallium‐arsenide that have been investigated by J.A. Rogers and M. Kanayama et al . For Cu(In,Ga)Se 2 ‐based absorber material M. Paire and D. Lincot et al investigated and published an enhancement in conversion efficiency by 4% absolute at 120× light concentration, which was recently further improved to plus 5% absolute at 475× concentration showing a final conversion efficiency of 21.3% .…”

Microstructures, optical and photoelectric conversion properties of spherical silicon solar cells with anti-reflection SnOx:F thin films

“…7) To improve the conversion efficiencies of the spherical Si solar cells, 8) high quality silicon balls, optical confinement structures, inactivation of defects by passivation, formation of a texture structure on Si surface, [9][10][11] optimization of structures of reflectors, 12,13) reduction in resistance, and high transmission of anti-reflection films are mandatory. [14][15][16][17] The purpose of the present work is to investigate the microstructures and optical and photoelectric conversion properties of spherical Si solar cells with anti-reflection (AR) F-doped tin oxide (SnO x :F, FTO) thin films. The annealing effects on conversion efficiencies were investigated, and the optical properties were investigated by optical absorption and fluorescence spectroscopy.…”