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Blade-coated flexible perovskite solar cell achieves 14.08% efficiency – pv magazine International


Italian researchers have used a blade coating to create a versatile photo voltaic cell with out poisonous dimethyl sulfoxide. They used the cell to make small photo voltaic modules with an effectivity of as much as 6.58%.

Scientists on the College of Rome Tor Vergata in Italy made a versatile perovskite photo voltaic module by depositing all of the layers by means of blade coating in ambient air.

“All layers are produced in ambient situations with a relative humidity of about 30-40%, so the manufacturing course of doesn’t require clear rooms and managed environments,” the researcher mentioned. Farshad Zafarzadeh. pv journal. “Moreover, the usage of extremely poisonous solvents is averted which is a step in the direction of the sustainability of perovskite photo voltaic cells.”

Within the paper “All-Blade-Coated Versatile Perovskite Photo voltaic Cells & Modules Processed in Air from a Sustainable Dimethyl sulfoxide (DMSO)-based Solvent System,” which was just lately revealed in Sustainable Power and Fuels, Zafarzadeh and his colleagues described the blade coating as a high-throughput deposition technique that requires easy gear and transferable to roll-to-roll fabrication, with minor adjustments.

“Blade coating on the perovskite layer in ambient environments is feasible solely by scorching casting, gasoline extinguishing, vacuum extraction, or a mix of those strategies to stop the unfold of moisture above the perovskite part,” they mentioned.

Within the manufacturing course of, the scientists used dimethyl sulfoxide (DMSO), which is a poisonous solvent generally used to deposit perovskite, just for step one, whereas within the second step they use isopropyl alcohol (IPA). On this manner, the DMSO doesn’t stay trapped within the perovskite layer as soon as the deposition is full.

They constructed the cell with a indium tin oxide (ITO) substrate, a tin(IV) oxide (SnO2) buffer layer, a perovskite absorber, and a gap transport layer (HTL) made from poly-triarylamine (PTAA).

The photo voltaic cells are lined by a big blade substrates (5 × 7 cm2) however measured on a smaller scale with 0.09 cm2 lively space, and the champion the system achieved 14.08% energy conversion effectivity,” they mentioned.

The Italian group additionally produces small photo voltaic modules based mostly on this cell know-how and achieves efficiencies of as much as 6.58%.

“We’ve got proven that this technique is for much longer than 13 cm2 × 13 cm2 sizes of versatile substrates. We’re at present engaged on bettering the efficiency of the modules and additional enhancing the units,” mentioned Zafarzadeh. “Though the associated fee evaluation just isn’t inside the scope of this work, we all know that blade coating is a low-cost method resulting from its simplicity and low materials consumption”

He additionally claimed that the manufacturing course of may very well be transferred to roll-to-roll manufacturing that may allow high-speed, low-cost, and large-scale manufacturing. “To not point out that the usage of versatile substrates enormously reduces the full weight of photo voltaic modules which reduces the price of transportation and upkeep,” he mentioned.

In March 2021, the College of Rome Tor Vergata introduced a perovskite photo voltaic module with a complete lively space of ​​42.8 cm2 and an aperture space of ​​50 cm2. The panel is constructed with 20%-efficient perovskite cells related in 14 sequence. It was capable of retain 90% of the preliminary effectivity after 800 hours of thermal stress at 85 C.

Three months later, it unveiled a perovskite photo voltaic module with cells based mostly on triple-cation cesium methylammonium formamidinium (CsMAFA). And in April 2022, it introduced a perovskite photo voltaic panel with a complete substrate dimension of 20 cm × 20 cm and a robust energy conversion effectivity of 11.9%.

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