Techniques for Increasing Stability of Perovskite Solar Cells

A cellulose ester derivative passivation layer for solar cells that enhances perovskite stability and efficiency through a novel interface engineering approach. The passivation layer is prepared by depositing cellulose ester derivatives on the perovskite layer, followed by deposition of metal electrodes. The cellulose ester derivatives form a robust barrier layer that protects the perovskite interface from environmental degradation while facilitating charge transfer and reducing non-radiative recombination. This approach addresses the interface issues in perovskite solar cells by creating a uniform, stable interface layer that enables efficient charge transport and reduces defects.

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Morpholine-modified perovskite solar cells with enhanced photoelectric conversion efficiency through the incorporation of morpholine halide doping or surface modification. The morpholine halide selectively modifies perovskite layers while preventing grain boundary recombination centers, thereby improving charge transport and open-circuit voltage. The morpholine structure and halide ions in the morpholine halide selectively interact with perovskite defects, leading to improved solar cell performance.

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Interface modification layer for perovskite solar cells that enables precise control of defect-induced non-radiative recombination. The layer is prepared through controlled spin coating or magnetron sputtering of silane materials with specific functional groups that match the defects at the perovskite absorption layer surface. This layer's chemical structure is engineered to selectively interact with different types of surface defects, thereby reducing carrier recombination and intrinsic degradation. The layer's cross-linked structure prevents water and oxygen penetration while maintaining interface stability under environmental conditions.

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Perovskite nanocrystal thin films that enhance stability and performance of perovskite solar cells through surface modification. The films are prepared by coating a mixed solution containing perovskite nanocrystals and a non-polar organic solvent on a substrate, followed by post-processing with a ligand solution containing a thiol group-containing ligand material. The thiol group-containing ligand material selectively replaces oleic acid and oleylamine ligands on the perovskite surface, forming strong metal-sulfur bonds and passivating the perovskite nanocrystals. This surface modification enables the perovskite nanocrystal thin films to maintain their stability against environmental factors, including heat, moisture, and oxygen, while maintaining their high photoelectric conversion efficiency.

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Polymer interface-modified inverted perovskite solar cells with enhanced photovoltaic performance through the introduction of an electron transmission interface modification layer between the perovskite layer and the electron transport layer. The modification layer, comprising a polymer material, interacts with the perovskite layer to passivate surface defects and reduce non-radiative recombination loss of photogenerated carriers. This layer is hydrophobic, which improves the stability of the perovskite solar cells.

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Long-chain branched alkyl ammonium-modified formamide perovskite solar cells with enhanced stability and durability. The modification layer is prepared between the formamide perovskite active layer and the hole transport layer, and is achieved through a spin-coating process that incorporates long-chain branched alkyl ammonium precursors. This modified layer prevents water-induced degradation while maintaining high photoelectric conversion efficiency.

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A method for preparing perovskite solar cells that improves efficiency and stability through a novel passivation process. The method involves applying a perovskite precursor solution, followed by a first annealing step, and then a passivating agent solution. The passivating agent is applied between the two annealing steps, where the perovskite precursor solution has not yet formed a dense film. The passivating agent, specifically a chlorobenzene solution of P3HT, is then applied to the perovskite film. This dual-step process eliminates the need for a separate passivation step and reduces defects in the perovskite light-absorbing layer. The passivation agent fills atomic defects, stabilizes grain boundaries, and improves carrier transport, resulting in enhanced photoelectric conversion efficiency and stability.

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A method for preparing perovskite solar cells with enhanced stability through surface modification. The method introduces a molecular passivation layer, specifically 3-(5-(4-(tertbutyl)phenyl)-1,3,4-oxadiazol-2-yl)benzene (OXD-7), to the perovskite light-absorbing layer. This surface passivation layer prevents carrier recombination and defects, while maintaining the perovskite material's optical properties. The OXD-7 layer effectively neutralizes interface defects and improves device performance through enhanced carrier mobility and reduced recombination rates.

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Perovskite solar cell with enhanced stability through interface engineering. The cell comprises a perovskite layer, hole transport layer, perovskite modification layer, electronic transport layer, hole blocking layer, and top electrode. The perovskite layer is prepared using a phenethylamine phosphite modification layer that significantly improves water and oxygen stability. The modification layer is applied through a single-step process, followed by thermal evaporation of the perovskite layer. This interface engineering approach addresses the stability issues associated with perovskite solar cells, particularly their susceptibility to hydrolysis and degradation in ambient air.

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Passivated perovskite thin-film solar cells with enhanced stability and performance through controlled surface passivation. The passivation layer is prepared by combining a perovskite light-absorbing layer with a passivation agent, which forms a stable interface between the perovskite and the passivation layer. This passivation layer is specifically designed to address the common issues of organic passivation molecules detaching from the perovskite surface under thermal and light conditions, while maintaining strong ionic bonding with the perovskite layer.

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A perovskite solar cell with enhanced performance through surface modification of the perovskite layer interface. The cell incorporates a P3HT polymer interface layer that selectively modifies the perovskite layer surface, enhancing carrier alignment and moisture barrier properties. This interface modification enables improved interface quality between perovskite and hole transport layers, while maintaining the perovskite's inherent photovoltaic properties. The P3HT layer also prevents water absorption and maintains the perovskite's stability.

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A perovskite solar cell with enhanced stability through surface modification. The cell comprises a substrate, hole transport layer, perovskite thin film, vulcanization layer, electron transport layer, and electrode. The perovskite layer is modified with a surface treatment that incorporates a specific organic compound, enhancing its interface properties with the transport layer and metal electrode. This treatment prevents ion diffusion into the perovskite while maintaining its charge transport capabilities. The modified perovskite layer is then encapsulated in a protective encapsulant layer to prevent degradation from environmental factors.

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Fluorine-rich non-hydroxyl MXene additive for perovskite solar cells that improves stability by enhancing carrier transport and nucleation control. The additive comprises fluorine-enriched MXene with no hydroxyl groups, where fluorine content is 20-35% and oxygen content is 5-15%. The MXene is prepared through a novel method that maintains its fluorine-rich surface properties while eliminating hydroxyl groups, enabling its incorporation into perovskite solar cell layers without compromising stability. The MXene's fluorine end groups facilitate hydrogen bonding and electrostatic interactions with perovskite ion crystals, while its hydrophobic surface prevents water adsorption that can degrade perovskite performance.

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Perovskite solar cells with enhanced environmental stability through interface modification. The modification involves a two-step process: first, a surface treatment of the perovskite active layer with a resin acid interface modification layer, followed by a hole transport layer preparation. This approach addresses the perovskite's water sensitivity by creating a stable interface between the perovskite active layer and hole transport layer. The modification layer is prepared through spin-coating of a resin acid solution onto the perovskite active layer, followed by heat treatment. The resulting interface-modified perovskite solar cells exhibit improved environmental stability compared to conventional perovskite solar cells.

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Perovskite solar cell with enhanced stability through interface modification. The cell comprises a transparent conductive substrate, electron transport layer, perovskite light-absorbing layer, interface modification layer, hole transport layer, and counter electrode. The interface modification layer is prepared between the perovskite light-absorbing layer and hole transport layer, where it selectively passesivates interface defects and improves radiative recombination. The interface modification layer is prepared using fluorine-containing sulfonate anions, which enhance stability by preventing water invasion and improving interface matching between the perovskite light-absorbing layer and hole transport layer.

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A method to enhance the stability of perovskite solar cells by modifying their light-absorbing layer. The method involves coating the perovskite crystal surface with a hydrophobic organosilicon material that selectively interacts with and stabilizes perovskite grain boundaries. This selective binding prevents water and oxygen molecules from penetrating the grain boundaries, thereby reducing degradation of the perovskite layer. The organosilicon material is formulated with a specific concentration range (0.01-1wt%) and volume ratio to optimize its performance in the perovskite solar cell environment.

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A 2D-3D perovskite solar cell with enhanced stability through a novel modification approach. The cell comprises a substrate, electron transport layer, 3D perovskite layer, 2D perovskite modification layer, hole transport layer, and top electrode layer. The 3D perovskite layer is modified with a 4-trifluoromethylphenethylamine iodine (TFP-I) layer, which is prepared through a spin coating process. This modification layer enhances stability by introducing hydrophobic interactions that prevent water penetration into the perovskite layer. The 2D perovskite modification layer is applied on top of the 3D perovskite layer, and the cell is then annealed to improve its stability. The combination of hydrophobic modification and annealing treatment significantly improves the cell's air stability and photoelectric conversion efficiency compared to conventional 3D perovskite solar cells.

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A perovskite solar cell with enhanced stability and efficiency through a novel interface modification process. The process involves coating the perovskite photovoltaic device with a specially designed amphiphilic molecule layer that selectively targets and stabilizes surface defects in the perovskite active layer. This modification enables improved electron-hole transport properties and enhanced device stability compared to conventional methods. The amphiphilic molecules are specifically engineered to interact with the perovskite's surface defects, forming a stable interface layer that enhances device performance.

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A perovskite solar cell interfacial layer that enhances device performance through a novel interface layer. The interfacial layer is composed of a methyl methacrylate-n-butyl acrylate copolymer layer that forms a passivating layer between the perovskite and electron transport layer. This copolymer layer contains functional carbonyl groups that coordinate with metal ions at the interface, preventing uncoordinated atoms from forming defects and facilitating carrier passivation. The copolymer layer also exhibits self-healing properties and hydrophobic properties, enhancing device durability and water management.

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A perovskite solar cell with enhanced optoelectronic performance through a novel passivation layer. The passivation layer, comprising a perovskite light-absorbing layer, a passivation layer, and a hole transport layer, prevents interface degradation and non-radiative recombination while maintaining the perovskite's intrinsic photovoltaic properties. The passivation layer is specifically designed to address both surface and grain boundary defects in the perovskite film, particularly those at the interface between the perovskite and the passivation layer. This dual-passivation approach enables improved stability and performance of perovskite solar cells compared to conventional passivation methods.

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