Researchers at the IIT (Indian Institute of Technology), Guwahati, have created hybrid perovskite-centered solar or photovoltaic systems that are highly efficient, cost-effective, easily recyclable and simple to manufacture. These devices were designed to achieve power conversion efficiencies of more than 21% while maintaining good thermal, ambient, and optical stability by applying cost-effective solution-centered photovoltaic device processing processes at room temperature.

Because of its abundant availability on the earth’s surface, solar energy (energy from the sun) is regarded as the most sustainable of all renewable energy sources. Inorganic solar cells (Silicon-based) are currently a key player in the market. However, because this technique necessitates high-temperature manufacturing, solar panels are expensive. Furthermore, solar panel recycling is toxic and difficult.

Due to its exponential increase in terms of efficiencies obtained within a decade, perovskite solar cells (PSCs) study has gotten a lot of interest. Perovskite materials, on the other hand, are exceedingly unstable in ambient (humidity and oxygen) environments, limiting their commercialization.

The study team at IIT Guwahati, which included research scientists Arvin Sain Tanwar from the Department of Chemistry, Ritesh Kant Gupta from the Centre for Nanotechnology, Rabindranath Garai from the Department of Chemistry, as well as Maimur Hossain from the Department of Chemistry, worked under the guidance of Prof. Parameswar K. Iyer.

Charged conjugated polymers have been included in photovoltaic gadgets as a passivation molecule to generate defect-free perovskite solar cell devices that are high-quality, according to a recent study.

The defect-free device with passivation has high efficiency of about 20.17 percent and outstanding reproducibility. By increasing the hydrophobicity of perovskite layer, this polymer-based passivation technique successfully increased long-term device durability.

The researchers demonstrated the synthesis of the multi-dimensional (2D&3D) graded perovskites as well as the exact function of surface recrystallization in achieving very high efficiencies, stability, and economical device scaling by mitigating perovskite defects in another recent study.

Systematic design and implementation of functional molecules like organic ammonium halide salt and 4-(aminomethyl) benzoic acid hydrogen bromide was strategically used to build 2D-3D classified perovskite and examined as performance enhancement and device engineering materials to achieve these impressive results. The efficiency of the 2D-3D graded device is 21.18 percent, which is very reproducible.

Furthermore, the top 2D layer of 2D-3D graded heterostructure effectively increases hydrophobicity, and the resulting device exhibits nearly no deterioration under humid circumstances. Large-area devices with an active area of 2 cm2 with high efficiency of over 18% were used to test the feasibility of these technologies. These devices can be combined in an array to create bigger photovoltaic modules on rigid or flexible surfaces, such as transparent windows in buildings.

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