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Summary: In this study, the perovskite film was modified using different functional groups, which optimized the crystallization and reduced trap density. The heterojunction structure formed by p-type modification improved charge transfer and collection, leading to enhanced device performance. A second modification was used to achieve excellent moisture and thermal stability, as well as reducing lead pollution.
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Zhiang Zhang et al.
Summary: This study demonstrated that anchoring acetylcholine (ACh(+)) on the surface of a quadruple-cation perovskite can improve band alignment, minimize V-oc loss, and passivate defects, resulting in efficient and stable perovskite solar cells. The ACh(+) treatment significantly enhanced power conversion efficiency (PCE) and open-circuit voltage (V-oc) while reducing hysteresis index, making it a promising strategy for PSCs preparation.
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Haipeng Zeng et al.
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Hang Xu et al.
Summary: By utilizing CsI-SnO2 complex as the buried interface for the electron transport layer, an effective strategy for enhancing the efficiency and stability of perovskite solar cells has been achieved. CsI modification facilitates perovskite film growth and defect passivation, while the gradient distribution of Cs+ contributes to suitable band alignment and enhanced resistance to UV exposure, resulting in significantly improved power conversion efficiency and UV stability for FAPbI(3)-based PSCs.
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Zhenyi Ni et al.
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Jiankai Zhang et al.
Summary: In this work, 2D Nb2CTx MXene nanosheets were prepared and used as electron transport layer (ETL) materials in perovskite solar cells. By altering the surface groups of the MXene nanosheets, the work function was matched with the conduction band minimum of the perovskite layer, resulting in improved performance of the solar cells. Additionally, the incorporation of treated MXene nanosheets into the perovskite precursor helped in the formation of high-quality and oriented growth perovskite films, leading to higher power conversion efficiency (PCE). The flexible and large-area devices with MXene ETLs and additives achieved the highest PCE. Furthermore, the unencapsulated devices demonstrated good stability after long-term storage.
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Lu Yang et al.
Summary: A novel compound HADI was designed to improve the efficiency and stability of flexible perovskite solar cells, showing significant roles in surface modification, passivation, and charge transfer. PSCs based on HADI-SnO2 electron transport layer exhibited outstanding performance.
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Min Wang et al.
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Xinhui Luo et al.
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Chi Li et al.
Summary: Designing multifunctional surface treatment materials is crucial for enhancing the stability and efficiency of perovskite solar cells. In this study, a metal-organic framework ZnL is used as a surface treatment material to improve perovskite crystallization and block unwanted intrusion, leading to enhanced performance and stability of the solar cells.
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Shaun Tan et al.
Summary: Optoelectronic devices rely on heterointerfaces between different semiconducting materials, and the energy-level alignment between them plays a crucial role in device performance. Surface treatments for perovskite solar cells can impact the energetics of the heterointerface, potentially affecting device stability. Balancing the pros and cons of surface treatments is essential for improving PSC stability.
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Zhen Li et al.
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Stefania Cacovich et al.
Summary: Interface engineering using passivating agents is an effective strategy to improve the performance of perovskite solar cells. This study investigates the interface and device physics of high efficiency inverted solar cells, quantifying charge recombination and losses. The results show that organic passivation mainly affects the perovskite/PCBM interface, and the use of organic passivation maximizes the photovoltaic figures of merit.
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Jiale Li et al.
Summary: This study systematically investigated the role of UVP additive in perovskite layers, demonstrating significant improvements in the quality of the perovskite absorbers, reduction of defects, enhanced non-radiative recombination efficiency, and efficient interfacial charge extraction. Furthermore, the UVP treated PSCs achieved a champion PCE of 22.46% with enhanced UV stability, showcasing a promising strategy for fabricating efficient and stable perovskite photovoltaics.
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Jason J. Yoo et al.
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ACS ENERGY LETTERS
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Jiwei Liang et al.
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Qin Zhou et al.
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Zhanglin Guo et al.
Summary: Perovskite solar cells have achieved significant progress in recent years, particularly in terms of their high open-circuit voltage. Improving the open-circuit voltage is critical for enhancing device efficiency. This review paper provides an overview of the recent developments in the open-circuit voltage of perovskite solar cells, discussing strategies to reduce undesirable recombination in the perovskite film and at the interfaces.
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Xiaoyu Yang et al.
Summary: Research has shown that losses at buried interfaces in perovskite photovoltaics are mainly caused by sub-microscale extended imperfections and lead-halide inhomogeneities, which are major obstacles to improving device performance. By utilizing passivation molecules for microstructural reconstruction, these losses can be significantly reduced, unlocking the full potential for enhancing device performance.
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Shaobing Xiong et al.
Summary: The use of natural additive capsaicin in perovskite solar cells leads to defect passivation and transformation of surface energetics, resulting in improved charge transport, efficiency, and stability. This approach shows potential for significant enhancement of PSC performance.
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Hanul Min et al.
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Jason J. Yoo et al.
Summary: Metal halide perovskite solar cells have shown great potential to disrupt the silicon solar cell market with their improved performance, yet still face limitations in light-harvesting due to charge carrier recombination. Efforts to enhance charge carrier management offer a path to increase device performance and approach the theoretical efficiency limit of PSCs.
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Jiankai Zhang et al.
Summary: Perovskite solar cells (PSCs) have great potential for next-generation photovoltaics due to their excellent optical and electrical properties, but defects inside the perovskite film can impair performance and stability. Utilizing the bioactive compound dopamine (DA) to passivate defects in perovskite films results in improved stability and efficiency of PSCs.
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(2021)
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Yuhong Zhang et al.
Summary: This study utilized a double-layer synergistic optimization approach by introducing functional black phosphorus quantum dots into both the electron transport layer and perovskite layer of perovskite solar cells. The synergistic effects led to efficient PSCs with high power conversion efficiency and ultrahigh open-circuit voltage, as well as improved long-term and humidity stability.
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Jaeki Jeong et al.
Summary: The research introduces a new concept of using formate anion to suppress defects in metal halide perovskite films and enhance film crystallinity, leading to improved efficiency and stability of solar cells.
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Guang Yang et al.
Summary: An effective approach to reduce photovoltage loss in metal halide perovskite solar cells is through the passivation of internal bulk defects and dimensionally graded two-dimensional perovskite interface defects. This method resulted in significantly low photovoltage loss and improved operational stability across different bandgap systems.
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Shangshang Chen et al.
Summary: The study found that DMSO liquid additive trapped in perovskite-substrate interfaces during film formation led to voids, accelerating film degradation. Partial replacement of DMSO with solid-state carbohydrazide reduced interfacial voids and increased stability. Blade-coated p-i-n structure PSCs achieved a maximum PCE of 23.6% without efficiency loss after stability tests, demonstrating improved efficiency and stability with the new approach.
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Shaobing Xiong et al.
Summary: Defect passivation via additive and energetic modification via interface engineering are effective strategies for achieving high-performance perovskite solar cells. The synergies of pentafluorophenyl acrylate as additive significantly suppress both defect-assisted recombination and interface carrier recombination, resulting in improved device efficiency and stability. This study provides a promising approach by choosing dual functional additives to enhance the efficiency and stability of PSCs.
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Jiankai Zhang et al.
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