Solvent Engineering for High-Performance Perovskite Solar Cells

A perovskite precursor solution, perovskite film, and preparation method for solar cells that improve uniformity and wettability of the precursor solution on substrates. The solution comprises a non-volatile salt with a specific molar ratio, which enables controlled precipitation of the perovskite material. The solution's uniformity and wettability are enhanced through precise control of the precursor solution's composition and processing conditions. This solution enables the production of high-quality perovskite films with improved uniformity and wettability on substrates, overcoming common challenges in perovskite film preparation.

Source

Preparation method for organic-inorganic hybrid perovskite solar cells and their large-area counterparts through controlled nucleation and crystallization. The method involves the precise control of precursor solution composition and processing conditions to achieve uniform grain size and defect-free perovskite films. The solution is prepared with specific mass ratios of key components, and the precursor is processed through controlled nucleation and crystallization steps. The resulting films exhibit superior morphology, crystallinity, and defect density compared to conventional spin-coating methods. The method enables the large-scale production of high-quality perovskite solar cells with uniform optical properties.

Source

Preparation of high-efficiency perovskite solar cells through controlled crystallization through a novel additive engineering approach. The approach involves spin coating a perovskite precursor solution containing a semiconductor additive (semicarbazide hydrochloride) onto a hole transport layer, followed by dropwise addition of an anti-solvent to achieve film formation. The film is then annealed to optimize crystallization conditions. The additive enables precise control over the perovskite's crystallization properties, including defect density and Sn2+ distribution, which are critical factors for achieving high efficiency and stability in perovskite solar cells.

Source

A novel precursor solution for perovskite solar cells that enables improved crystal quality and optical properties. The solution comprises a specific composition of DMF, DMSO, FAI, PbI2, FAHCOO, FACHCOO, and FASCN, with optimized molar ratios. This composition enables the formation of perovskite materials with enhanced crystal structure, reduced defects, and superior optical performance compared to conventional precursors.

Source

Homogeneous perovskite nanocrystal thin films prepared through an in-situ solution process that incorporates specific ligands to control crystallization kinetics and grain size. The method involves adding bidentate ligands like 6-aminocaproic acid hydrobromide and 3-aminopropionic acid hydrobromide to the precursor solution, which enables rapid crystallization of perovskite nanocrystals while maintaining uniform size and quality. This approach enables the production of homogeneous perovskite films with superior optoelectronic properties compared to traditional methods.

Source

Micron-scale grain MAPbBrxI3-x (1.5<x<3) polycrystalline film prepared through a novel two-step process that combines precise precursor formulation and controlled dropwise addition of solvents. The process involves creating a uniform clear solution through ultrasound-assisted dissolution, followed by the addition of dimethyl sulfoxide to enhance solubility. The solution is then applied to a substrate treated with ozone, and the film is processed through spin coating at optimized conditions to achieve micron-scale grain structure. The film's morphology is optimized between 80°C to 150°C for optimal grain size and uniformity.

Source

Coating perovskite solar cells with enhanced efficiency through controlled crystallization. The coating process involves maintaining uniform temperature and fluidity during precursor solution delivery, preventing premature crystallization and precipitation. This approach enables precise control over the precursor solution's properties, ensuring uniform solute distribution and crystal growth. The resulting perovskite layers exhibit improved crystallinity, reduced grain size, and enhanced photoelectric conversion efficiency compared to conventional coating methods.

Source

A method for preparing perovskite solar cells that enables precise control of the perovskite light-absorbing layer (PABL) film quality through optimized processing conditions. The method involves preparing a metal halide film on a substrate, followed by spin-coating an organic salt solution to form the PABL film. The film is then subjected to controlled thermal treatment to achieve uniform crystallization and grain size distribution. This approach enables the production of high-performance PABL films with controlled defects and uniform grain size, which are critical factors in perovskite solar cell performance.

Source

A method for preparing high-efficiency low-temperature perovskite solar cells through controlled crystallization of perovskite precursor solutions. The method employs a novel precursor-solvated mesophase-FAPbI3 crystallization route, where ionic liquid additives enhance film quality and defect reduction through self-healing during crystallization. The solution formulation specifically incorporates 1-ethyl-3-methyl-imidazole bisulfate as an additive, enabling the formation of high-quality perovskite films with enhanced grain size and carrier lifetime. This approach enables the production of high-efficiency solar cells with superior performance characteristics at both room and low temperatures.

Source

A method for preparing and applying perovskite solar cells using a novel approach that enables controlled synthesis of tin perovskite thin films. The method involves a specific ratio of N,N-dimethylformamide to dimethyl sulfoxide in the precursor solution, followed by a controlled deposition process using an anti-solvent. The resulting perovskite films exhibit improved crystallinity and uniformity compared to conventional methods, enabling the fabrication of high-performance perovskite solar cells.

Source

A simple and efficient method to prepare high-quality bromine-based perovskite films for solar cells. The method involves a two-step process with residence time adjustment. The steps are: 1) Coating a lead bromide (PbBr2) precursor onto a substrate and annealing it to form a lead bromide film. 2) Dropping a cesium bromide (CsBr) aqueous solution onto the lead bromide film and spin coating it to form an intermediate film. 3) Annealing the intermediate film, cooling it, soaking it in an alcohol, and annealing it again to obtain the final high-quality bromine-based perovskite film. The residence time adjustment of the CsBr solution regulates the interaction and crystallization of the perovskite, improving film quality, reducing defects

Source

A novel method for improving the quality of perovskite solar cells through controlled deposition of metal halide precursors. The method involves a specific sequence of precursor deposition and annealing steps to enhance the crystallinity and uniformity of the perovskite layer. The precise control over precursor concentrations and deposition conditions enables the formation of high-quality perovskite films with controlled grain sizes, which are critical for achieving optimal photovoltaic performance.

Source

Preventing defects in perovskite solar cells through controlled nucleation and solvent management. The method involves creating a perovskite precursor solution with a higher concentration than the nucleation threshold, then subjecting it to multiple consecutive solvent removal treatments. During these treatments, the solution is pre-generated with numerous mesophase crystal nuclei, which are then controlled to prevent their growth. The solution is then applied to a substrate through spin coating, where anti-solvent droplets are introduced to prevent crystal nucleation. This approach enables the formation of dense perovskite films while maintaining high purity and preventing defects.

Source

Preparation of high-quality perovskite solar cells through a novel two-step method that enables large-area uniformity and high crystallinity. The method involves first depositing metal halide thin films on a substrate, followed by applying a controlled organic halide solution to the metal halide film. The solution temperature is precisely maintained between 40-100°C to optimize solubility and uniformity of the organic halide. The organic halide solution is then applied to the metal halide film, followed by rapid cooling to facilitate nucleation and growth of large perovskite crystals. This approach addresses the common challenges of perovskite solar cell preparation, particularly in achieving uniform film thickness and crystal size across large areas.

Source

A perovskite solar cell with enhanced performance through a novel precursor solution and preparation method. The solution comprises lead iodide, methyl iodide ammonium, and organic solvent, with specific concentrations of lead iodide, methyl iodide ammonium, and 1-benzyl-3-hydroxypyridinium chloride. The precursor solution is spin-coated onto a substrate followed by annealing treatment. The method enables the creation of perovskite solar cells with improved carrier mobility, reduced grain size defects, and enhanced passivation properties.

Source

A method for preparing perovskite solar cells without methylamine components, enabling improved photovoltaic performance through the use of a novel perovskite film. The method employs a two-step process that eliminates the need for methylamine by replacing it with a suitable alternative. The film preparation involves a solution-based method that enables precise control over deposition rates and thicknesses, while maintaining stability and reproducibility. This approach enables the production of high-quality perovskite solar cells with enhanced photovoltaic performance compared to conventional methylamine-containing systems.

Source

Method to manufacture large-area perovskite solar cells with improved uniformity and efficiency. The method involves mixing a perovskite precursor with an enhancer having a contact angle of 5-13 degrees on the substrate. This enhancer-doped perovskite solution is applied using techniques like bar coating or slot die coating, then dried and heat treated to form the perovskite thin film. This enhancer-containing process enables high-density thin films with low pinhole density compared to conventional methods. It allows mass production of large-area perovskite thin films with uniformity and efficiency suitable for solar cells.

Source

Preparation of high-quality perovskite layers for photovoltaic devices through a novel two-step method. The method involves depositing an inorganic metal halide precursor layer followed by an organic precursor layer, with the organic precursor solution containing a monovalent cation and a divalent inorganic cation. The precursor solution is prepared with a specific molar ratio of valent cation to divalent inorganic cation that optimizes charge carrier mobility and stability. This approach enables the formation of high-quality perovskite layers with improved optical and electrical properties, while maintaining compatibility with the substrate and enabling large-area photovoltaic devices.

Source

Regulating and controlling perovskite crystallization to achieve high-quality solar cells. The method involves controlling the crystallization process through precise temperature and composition control, specifically targeting the nucleation and growth stages. This enables the formation of high-quality perovskite films with uniform grain sizes and pore-free structures, critical for achieving high efficiency solar cells.

Source

A novel method for preparing two-dimensional perovskite thin films through controlled precursor solution preparation. The method optimizes the precursor composition to ensure uniform crystal growth in polycrystalline perovskite films, eliminating the conventional issues of phase heterogeneity and phase distribution. The optimized precursor solution enables precise control over the crystal structure, leading to uniform film properties and improved photovoltaic performance.

Source