Novel porous silicon backside light reflector for thin silicon solar cells

Efficiency (>15%) for thin‐film epitaxial silicon solar cells on 70 cm2 area offspec silicon substrate using porous silicon segmented mirrors

“…The concept of introducing the PSi with alternating refractive index in the solar cell application was done by Zettner et al [10]. and by Mueller et al [11].…”

Epitaxial Thin Film Crystalline Silicon Solar Cells on Low Cost Silicon Carriers

“…As porous silicon retains the crystallographic information of the original crystal it is etched into, the application of a silicon deposition process can lead to ordered deposition defined by the original crystal structure of the substrate. It therefore seems ideal for the purpose described above [61,62]. Significant efforts have been made to model and optimize the reflectance of the porous Si interlayer.…”

“…Significant efforts have been made to model and optimize the reflectance of the porous Si interlayer. Zettner et al [61] and Abouelsaood et al developed a model for light propagation in porous silicon (PS) based on the theory of wave propagation in random media [63]. The modeling in the latter is based on silicon being the host material in combination with randomly distributed spherical voids as scattering particles.…”

Passivation of the surface of rear contact solar cells by porous silicon

“…Different authors have proposed to use porous silicon (PS) as a single-or multilayer antireflection coating [1][2][3], light diffuser [4], backside reflector [5] and blue-to-red light transformer [6]. A significant improvement of optical confinement was found after PS formation.…”