Efficient Polymer Scattering Layer Fabrication and their Application in Electrical Properties Enhancement of Perovskite/Silicon Tandem Solar Cells

Abstract

Tandem Solar Cells with Silicon as one of its constituents have flat surfaces (surfaces without texturing). That is why flat surfaces Solar cells have got quite importance. But the issue with the flat surfaces is the high reflection loss (flat) and poor light trapping (no-texturing) in the cells. So, some scattering film, other than direct texturing, that is polydimethylsiloxane (PDMS) polymer with the texture is used. The optimized PDMS film here is the random pyramidal film because random pyramidal PDMS films have a drop of 56.6% in reflectance used on polished Silicon while iso-textured and inverted pyramids have 51.55% and 48.47% respectively. This PDMS film with random textures when applied to 2-terminal monolithic perovskite/Silicon tandem, its external quantum efficiency shows an increase of 1.12mA/cm2in the short-circuit current and reflection loss reduces by 4.1 mA/cm2.

Stretchable ITO‐Free Organic Solar Cells with Intrinsic Anti‐Reflection Substrate for High‐Efficiency Outdoor and Indoor Energy Harvesting

“…10k‐PDMS showed the lowest reflectance of ≤ 4%, while 2k‐ and 6k‐PDMS were ≤ 5%. [ 64,65 ] The high transmittance and low reflectance enable suppressed light loss and enough light utilization to improve OPV efficiency.…”

Light Management in Monolithic Perovskite/Silicon Tandem Solar Cells

“…Furthermore, Wu et al demonstrated that an inverted‐pyramidal‐textured silicone foil was efficient in suppressing reflection losses in tandem devices (Figure b). In addition, laminated polydimethylsiloxane (PDMS) films with a pyramidal or an inverted‐pyramidal structure have also been extensively employed as efficient TARFs to enhance the light absorption of TSCs and thus increase their efficiency (Figure a–d). Jošt et al achieved an impressive PCE of 25.5% in a flat front‐side 2T perovskite/silicon TSC with a polymer TARF (Figure e,f).…”