Perovskite-Silicon Tandem Solar Cells

Wide bandgap perovskite solar cells and tandem solar cells that achieve higher efficiency than traditional silicon-based cells through the use of perovskite materials with bandgaps greater than 1.65 eV. The perovskite materials employ a methylene diammonium-based cation salt with halide, sulfonate, formate, or tetrafluoroborate anions, which enhance stability and efficiency compared to conventional perovskites. The tandem architecture combines these perovskite materials with crystalline silicon cells, enabling higher power conversion efficiency than traditional tandem configurations.

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A crystalline silicon/perovskite stacked solar cell with improved efficiency and stability. The cell features a perovskite absorption layer on the bottom of the silicon cell, followed by a transparent oxide conductive layer as the intermediate tunneling layer. A perovskite absorption layer on the top of the silicon cell provides selective hole transport, while a passivation layer on the perovskite absorption layer enhances its stability. The perovskite absorption layer is connected to the silicon base through a transparent oxide conductive layer, ensuring minimal damage to the silicon cell during the stacking process. The passivation layer on the perovskite absorption layer prevents interface defects and maintains the perovskite's optical properties. This configuration enables the perovskite absorption layer to be prepared on the silicon cell, eliminating the need for a separate tunneling layer and perovskite transport layer.

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Manufacturing a flexible perovskite monocrystalline silicon tandem solar cell through a novel multi-step process. The process involves depositing perovskite layers on a modified interface layer using a preconfigured precursor solution, followed by precise control of the precursor composition to enhance mechanical properties, defect suppression, and self-healing performance. The perovskite layers are then deposited on top of a silicon substrate using magnetron sputtering. The process enables the fabrication of flexible perovskite single crystal silicon tandem solar cells with enhanced mechanical properties and improved self-healing capabilities.

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Potassium-doped perovskites and perovskite solar cells with enhanced photoelectric conversion efficiency and stability through controlled doping and surface modification. The perovskites incorporate cesium (Cs) as a stabilizing ion, while the surface modification employs hydroxylammonium ions to create a stable interface layer. The Cs ion enhances the perovskite's stability under thermal and light conditions, while the hydroxylammonium ions facilitate surface passivation. The perovskite solar cells achieve high photoelectric conversion efficiency (25.2%) and stability (up to 25% degradation over 1000 hours) through this integrated approach.

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Perovskite/silicon laminated solar cells with enhanced stability and cost-effectiveness. The cells integrate perovskite solar cells on top of silicon-based solar cells, with a transparent conductive oxide (TCO) layer between them. The TCO layer is prepared using a novel scraping-coating method that enables precise control over precursor solution thickness and composition. This approach eliminates the need for complex oxide transfer layers and reduces production costs. The perovskite solar cells maintain their optical properties while the TCO layer provides electrical conductivity. The integrated architecture enables high-efficiency solar cells with improved stability and reduced material costs compared to conventional perovskite/silicon tandem solar cells.

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All-inorganic perovskite solar cells with improved efficiency through enhanced energy conversion through a novel doping strategy. The cells employ a zinc oxide electron transport layer that is doped with bis(pentafluorophenyl)zinc (ZCF) to create a more optimal Fermi level alignment between the perovskite and carrier transport layers. This doping enables improved carrier mobility and reduced recombination losses, leading to enhanced power conversion efficiency. The doping process involves spin-coating the ZCF-doped tin oxide layer onto the perovskite precursor solution, followed by spin-coating the zinc oxide layer onto the doped tin oxide. The resulting cell achieves 16.73% power conversion efficiency, surpassing the original 15.21% value.

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A perovskite/silicon heterojunction tandem solar cell that eliminates the need for a barrier layer between the perovskite and silicon layers. The cell features a silicon heterojunction cell as the primary photovoltaic component, with a perovskite layer on top. The perovskite layer is directly connected to the silicon layer through a transparent electrode layer, which is made of reactive plasma deposition (RPD) or magnetron sputtering deposition. This configuration eliminates the conventional barrier layer requirement, while maintaining the benefits of both materials. The transparent electrode layer serves as a conductive path between the perovskite and silicon layers, ensuring efficient charge transfer and maintaining the tandem solar cell's high light transmission properties.

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Perovskite tandem solar cell with improved cell contact and efficiency. The cell comprises a silicon solar cell with a transparent conductive layer and intrinsic layers, followed by a perovskite cell with a transparent conductive layer and intrinsic layers. The perovskite cell has an intrinsic layer, electron transport layer, hole transport layer, and transparent conductive layer. The silicon solar cell has a silicon substrate, diffusion layer, and passivation layer. The perovskite cell has an intrinsic layer, electron transport layer, hole transport layer, and transparent conductive layer.

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Perovskite crystalline silicon tandem solar cell with enhanced efficiency through a novel configuration. The cell comprises a bottom P-type silicon substrate, a top perovskite absorption layer, an intermediate layer doped with mirror ions and erbium ions, a backpassivation layer, a transparent electrode, and an upper electrode. The configuration incorporates an ITO layer in the intermediate layer to enhance charge transport, while maintaining the conventional backpassivation and transparent electrode. This arrangement addresses the optical losses typically associated with perovskite silicon tandem solar cells.

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A pivalate-doped all-inorganic perovskite solar cell with improved thermal stability through the use of pivalate-doped lead iodide perovskite (CsPbI3-xBrx) instead of lead iodide. The pivalate-doped perovskite absorbs light at 1.73 eV with a higher tolerance factor compared to lead iodide, enabling more efficient solar conversion. The pivalate-doped perovskite layer replaces iodide ions in the CsPbI3-xBrx structure, offering enhanced thermal stability while maintaining the material's optical properties. The solar cell achieves 87.41% efficiency after 600 hours, surpassing conventional perovskite solar cells.

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Solar cells based on pseudo-halide perovskite containing thiocyanate ions achieve enhanced stability through the replacement of iodine with thiocyanate. This approach enables the development of high-efficiency solar cells with improved thermal and moisture resistance, overcoming common challenges associated with traditional halide perovskite materials.

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A solar cell comprising a perovskite layer on one side of a silicon substrate and a perovskite layer on the other side, where the perovskite layer is used as a top cell in a tandem solar cell configuration. The perovskite layer is formed on the silicon substrate using a process that includes depositing the perovskite material onto the silicon substrate in a controlled manner. The perovskite layer is used to enhance the solar cell's efficiency by creating a multi-band structure that absorbs a broader spectrum of solar radiation. The perovskite layer is deposited on the silicon substrate using a process that includes depositing the perovskite material onto the silicon substrate in a controlled manner. The perovskite layer is used to enhance the solar cell's efficiency by creating a multi-band structure that absorbs a broader spectrum of solar radiation.

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A thin-film crystalline silicon perovskite heterojunction solar cell that achieves high efficiency through a novel preparation method. The cell combines a transparent conductive oxide (TCO) substrate with a perovskite light-absorbing layer and a P-type crystalline silicon hole transport layer. The TCO substrate serves as the perovskite light-absorbing layer, while the P-type crystalline silicon hole transport layer replaces the conventional bulk silicon material as the hole transport layer. This configuration enables the perovskite material to absorb light efficiently, while the crystalline silicon provides a stable and cost-effective hole transport layer. The cell achieves high photoelectric conversion efficiency (up to 20%) and maintains excellent performance characteristics, including open-circuit voltage and current density, even at room temperature.

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A solar cell with improved stability and efficiency through a novel back contact architecture. The cell employs a mesh structure comprising a dielectric layer and metal layer, where the dielectric layer is formed through dry etching of PS beads. This mesh structure protects the perovskite material from moisture and hydrophobicity while maintaining efficient charge transport. The cell's back contact is achieved through a dielectric-metal mesh interface, enabling enhanced stability and conversion efficiency compared to conventional back contacts.

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