Environmentally Friendly Solvents for Perovskite Solar Cells

A method for preparing high-quality perovskite solar cells on a large area in air, enabling scalable production of photovoltaic devices. The method involves depositing a perovskite precursor layer, followed by a reaction source and solvent solution. The solution is applied to the substrate using a controlled, air-based process that maintains consistent humidity levels. This approach eliminates the need for traditional laboratory-scale glove box operations and enables efficient production of high-efficiency perovskite solar cells.

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A green solvent for perovskite light-absorbing layers of perovskite solar cells that replaces traditional toxic solvents like DMF. The solvent, diethyl methylphosphoryl acetate, provides superior stability, moisture resistance, and film properties compared to DMF. The solvent ratio is optimized to achieve efficient perovskite film preparation while maintaining environmental safety and production feasibility.

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Additive for preparing perovskite material layer through improved precursor solution formulation. The additive is methyl amine acetate ionic liquid, which enables enhanced solvent ratio optimization in perovskite precursor solutions. This formulation enables the creation of perovskite materials with improved crystal structure, surface quality, and stability compared to conventional precursors.

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A low-cost preparation method for perovskite solar cells that enables efficient production of high-efficiency perovskite solar cells without requiring specialized equipment or high-temperature processing conditions. The method involves dissolving perovskite precursor in a solvent, followed by a surfactant-assisted filtration and washing process to produce high-quality perovskite single crystals. The resulting perovskite crystals can be directly used in solar cell fabrication, eliminating the need for complex preparation steps involving inert gas environments or monolithic crystallization.

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A method for manufacturing tandem solar cells that prevents damage to the lower perovskite cell during stacking. The method employs a novel perovskite solution containing a specific composition of perovskite compound and solvent, which enables homogeneous formation of the second perovskite layer through rapid solvent evaporation during spin coating. This approach ensures efficient and cost-effective tandem solar cell fabrication while maintaining the structural integrity of the lower perovskite cell.

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Preparation method and application of methylamine iodide for perovskite solar cells through a novel synthesis route. The method involves a controlled crystallization process using a combination of rotary evaporation and controlled atmosphere conditions to produce high-purity methylamine iodide precursor. This approach enables the synthesis of perovskite solar cells with improved purity and stability compared to conventional methods.

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A perovskite solar cell preparation method that enables efficient inverted structure solar cells without hole transport layers. The method employs a low boiling point solvent to rapidly dissolve the mixed component perovskite, resulting in crystallized perovskite layers with improved crystal quality, contact, and carrier mobility. This approach enables the formation of perovskite-based solar cells with enhanced open-circuit voltage, short-circuit current, and fill factor compared to conventional perovskite solar cells.

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Perovskite solar cells with improved efficiency through environmentally friendly preparation methods. The invention presents a perovskite material with a novel chemical structure that enables enhanced photovoltaic performance through optimized preparation conditions. The material's unique composition, comprising specific organic molecules, leads to improved crystal quality and reduced production costs compared to traditional lead-based perovskites. The solar cells, comprising the material, achieve high efficiency levels through their enhanced photovoltaic properties.

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Method and apparatus for preparing perovskite solar cells through controlled deposition of lead halide perovskites. The method employs a novel approach where a third evaporation source, comprising a perovskite precursor, is used in conjunction with a second evaporation source containing lead iodide (PbI2) and a halide (X). The third source provides a controlled precursor for the perovskite structure, enabling precise composition control and reduced solvent usage compared to conventional multi-component sources. The apparatus features automated substrate transfer and vacuum chamber operation, allowing for continuous production of high-quality perovskite films.

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Solar cells with enhanced perovskite performance through the incorporation of conjugated internal salt additives. These additives, with their conjugated structures, enable improved charge carrier mobility and stability in perovskite solar cells. The conjugated structure facilitates efficient charge transfer and carrier recombination pathways, while maintaining structural integrity. The conjugated internal salt additives can be used in combination with lead iodide and methylammonium iodide precursors to achieve enhanced perovskite performance.

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A method for preparing perovskite films through a green solvent-based approach that improves crystal quality, defect density, and radiative recombination efficiency compared to conventional solvents. The method involves dissolving perovskite precursors in a green solvent blend, which is then applied to a substrate surface through spin-coating. The green solvent blend eliminates the need for dropwise solvent addition, simplifying the process while maintaining uniformity and preventing defects. The green solvent blend can be prepared by mixing green solvents with green antisolvents. This approach enables the production of high-quality perovskite films with improved performance characteristics.

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A mixed solvent system for perovskite solar cell preparation through solution processing, enabling the development of perovskite photovoltaic devices while minimizing environmental impact. The system comprises a solvent comprising gamma-valerolactone, a food-grade spice, and a non-toxic solvent like ethanol or isopropanol. The solvent is used in a solution processing sequence that includes spin coating, anti-solvent treatment, and annealing, resulting in high-quality perovskite films with improved stability and crystallization characteristics compared to conventional N,N-dimethylformamide-based solutions.

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A method for preparing perovskite thin films using a green solvent that replaces conventional hazardous solvents. The method employs gamma-valerolactone as a solvent for perovskite precursor solutions, enabling the production of high-quality perovskite films through solution processing. The process involves spin coating, blade coating, slit coating, and anti-solvent treatment to form quasi-perovskite precursor films, followed by controlled thermal treatment to induce crystallization. The gamma-valerolactone solvent is a food-grade compound that meets the requirements of the GB2760-86 standard for edible spices. This approach enables the production of perovskite solar cells and LEDs while minimizing environmental and health risks associated with traditional solvents.

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A green solvent for perovskite solar cell production that enables room temperature synthesis of perovskite single crystals. The solvent, gamma-valerolactone, is a non-toxic, edible spice that can be used in conventional perovskite synthesis processes. The gamma-valerolactone enables the formation of high-quality perovskite crystals at room temperature without the need for hazardous solvents like N,N-dimethylformamide or dichloromethane. This approach addresses the environmental and operational challenges associated with traditional perovskite synthesis methods.

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A method for synthesizing composite luminescent materials through controlled growth of perovskite nanocrystals within micro/mesoporous materials. The synthesis process involves using green solvents to synthesize perovskite-micro/mesoporous composite materials, where alkali metal ions facilitate controlled growth of perovskite nanocrystals within the porous framework. This approach enables the synthesis of perovskite materials with improved stability and optical properties, particularly in environments where conventional synthesis methods are not feasible.

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Perovskite solar cell with improved stability through a novel perovskite precursor solution. The solution contains a hydrohalide salt with a bulky amine group, which enhances the perovskite's photoelectric properties while preventing the formation of defects that lead to instability. The precursor solution is prepared by combining the hydrohalide salt with methylamine chloride (MACl) in a specific molar ratio, resulting in a perovskite material with improved stability compared to conventional precursors. The solution is then used to form a perovskite thin film through spin-coating and annealing.

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A method for preparing a precursor solution for a seed layer of a perovskite thin film in a solar cell, and a perovskite solar cell and a tandem solar cell to which the same is applied. The method involves preparing a solution containing an organic halide and an alkali halide in a solvent at room temperature, where the solution is completely dissolved. The solution is then applied to the substrate to form a seed layer, and the seed layer is converted into a perovskite layer by applying a specific composition to the seed layer.

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A method for preparing perovskite solar cells using a green solvent system that enables high-performance devices with low environmental impact. The method involves dissolving perovskite precursor materials in a green solvent, which is then used to prepare the perovskite film. The green solvent is environmentally friendly, non-toxic, and has excellent solubility properties for perovskite precursor materials, allowing for the formation of high-quality perovskite films. The prepared perovskite film is then used as the light-absorbing layer in the solar cell, enabling significant improvements in photovoltaic performance compared to traditional solvent-based methods.

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A green anti-solvent for perovskite solar cells that enables efficient production of high-quality perovskite thin films through a novel solvent system. The solvent, 1,3-dioxane, is used in combination with conventional anti-solvents to replace traditional solvents while maintaining environmental sustainability. The solvent system enables the crystallization of perovskite materials through green solvents, eliminating the need for hazardous solvents like toluene and chlorobenzene. This approach enables the production of high-quality perovskite films for solar cells, particularly for perovskite solar cells, while reducing environmental impact.

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A functional solvent for preparing lead-tin blended perovskite films in air, enabling green synthesis of high-performance perovskite solar cells without anti-solvent treatment. The solvent comprises a combination of organic amine salts, methylamine acetic acid ionic liquid, and specific additives that enhance crystallization rates and suppress oxidation. The solvent enables the direct preparation of lead-tin blended perovskite films in air, eliminating the need for traditional anti-solvent treatment and glove box environments.

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