High-Efficiency and Thermally Sustainable Perovskite Solar Cells with Sandpaper-Aided Flexible Haze/Antireflective Films

Abstract

A sandpaper-aided haze film (SAHF) is fabricated by a single-step, facile, and cost-effective soft-imprint lithography technique via commercially available and inexpensive sandpaper master molds. Such a low-priced SAHF exhibited a superior antireflective ability with an average transmittance of 93.7% in the wavelength range of 350–800 nm. It also possesses a high diffuse transmittance and very high haze transmission values of approximately 84.3% and 89.8%, respectively. Resultantly, laminating the SAHF on the transparent side of perovskite solar cells (PSCs) remarkably enhances the light absorption into their active layer and also improves the light-harvesting ability. Thus, the power conversion efficiency of PSC is enhanced from 17.07% to 20.34% by laminating the SAHF on the surface of the cell. In addition, the hydrophobicity and thermal resistance of SAHF is also exploited to stabilize (or maintain) the efficiency of PSCs for a long-term period under dark and solar irradiation conditions.

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.…”

Infrared Plasmonic Metamaterials Based on Transparent Nanoparticle Films of In2O3:Sn for Solar-Thermal Shielding Applications

“…The lower the haze value, the higher the clarity of the NP film. The haze value can be obtained by the following relation normalh normala normalz normale false( % false) = ( T 4 T 2 − T 3 T 1 ) × 100 where T 1 and T 2 are the incident light and the total transmittance of the NP film, respectively, T 3 is the light scattered inside the integrating sphere, and T 4 is the light scattered by the NP film in addition to that inside the integrating sphere . The haze values of the NP films were obtained using a haze meter (Nippon Denshoku Co., NDH-5000).…”

“…A strong correlation was observed where T 1 and T 2 are the incident light and the total transmittance of the NP film, respectively, T 3 is the light scattered inside the integrating sphere, and T 4 is the light scattered by the NP film in addition to that inside the integrating sphere. 44 The haze values of the NP films were obtained using a haze meter (Nippon Denshoku Co., NDH-5000). The obtained haze values were about 2−3%, indicating weak light scattering (Figure 5b).…”

Flexible Perovskite Solar Cells: From Materials and Device Architectures to Applications

“…The development of transparent electrodes contributes to the realization of semitransparent f-PSCs, which are promising to work in smart displays and windows. − Jang et al reported semitransparent f-PSCs with both transparent electrodes fabricated by graphene doping with bis­(trifluoromethanesulfonyl)­amide (TFSA) and triethylenetetramine (TETA), which realized PCEs of 10.56 and 10.73% at two sides, respectively . The research on all-inorganic f-PSCs is conducive to solving the stability problem owing to their good thermal and illumination stabilities. − Lead-free f-PSCs can reduce the heavy metal pollution of lead. − An adjustable band gap makes f-PSCs applicable in tandem solar cells. − Additionally, a series of low-cost, environmentally friendly, and biocompatible materials have been employed in f-PSCs. − Undoubtedly, these investigations will facilitate the commercial applications of f-PSCs.…”