Reduction of the plasmonic absorption in the nanotextured back contact of a-Si:H solar cells by employing an n-SiO :H/LiF interlayer

On the potential of light trapping in multiscale textured thin film solar cells

“…Recent studies have shown that the optical losses of the back reflector can also be reduced by introducing magnesium fluoride (MgF 2 ) or lithium fluoride (LiF) as a buffer layer in thin film [42,43] and crystalline silicon heterojunction solar cells [44]. Both materials exhibit a low refractive index (n o1.5) and a very low extinction coefficient.…”

“…It has been demonstrated that the short circuit current can be increased without deteriorating the open circuit voltage and fill factor of the solar cells. A recent study has shown that a gain in the short circuit current in the solar cells with lithium fluoride as buffer layer is mainly due to smoothening of the back contact morphology [43].…”

Light Propagation in Flexible Thin-Film Amorphous Silicon Solar Cells with Nanotextured Metal Back Reflectors

“…A series of state-of-the-art front-side antireflection schemes have been developed by random or periodic microstructures/nanostructures, − which will excite the scattering effect or provide a gradient effective refractive index. In addition, nanostructured metallic back reflectors (BRs) have been proved as another attractive approach to improve the light harvesting capability of a material. − When the incident light illuminates the nanostructured BRs, the surface electrons will collectively oscillate and then evolve into surface plasmons, which have a larger scattering cross-section than the corresponding geometric dimension does . Thus, the absorption of the scattered incident light by the adjacent active absorbing layer can be improved, resulting in an enhancement of the photocurrent of the solar cell.…”

“…Thus, the absorption of the scattered incident light by the adjacent active absorbing layer can be improved, resulting in an enhancement of the photocurrent of the solar cell. In general, the metallic nanostructures are designed to maximize the absorption efficiency of the photoactive layer and, at the same time, to depress parasitic absorption in other functional layers. ,, …”