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Yeyong Wu et al.
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Summary: In this work, UiO-66, a classical Zr-MOFs material, was added to the PbI2 layer to improve the conversion process and durability of perovskite solar cells. The addition of UiO-66 changed the morphology of the PbI2 film, resulting in better contact with organic salt and enhanced perovskite conversion. It also suppressed halide vacancies formation and improved charge transport and optoelectronic properties. The UiO-66-assisted devices achieved a champion power conversion efficiency of 23.05% and improved stability compared to the pristine devices.
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Summary: By introducing vertical graded PbI2 distribution and capping a cis-Ru(H(2)dcbpy)(dnbpy)(NCS)(2) (Z907) internal encapsulation layer, the photoinstability, hysteresis, and humidity-related degradation issues caused by excess PbI2 in perovskite solar cells (PSCs) can be improved.
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Review
Energy & Fuels
Yipeng Han et al.
Summary: The quality of the perovskite film is crucial to the technological breakthrough of perovskite solar cells (PSCs). The two-step method is an effective way to achieve high quality and reproducibility of perovskite films. This article summarizes the reaction mechanism of the two-step method and introduces the strategies for preparing high-quality films. It also discusses the current issues and future research suggestions for the two-step method.
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Xinyi Zhu et al.
Summary: A facile internal packaging interface strategy is developed to effectively heal the interface defects and provide airtight protection for perovskite films in flexible solar cells, enhancing their performance and stability. The strategy utilizes a selective light-cured cross-linking molecule. The flexible devices show excellent performance in small size and scalable modules, with good moisture resistance, light soaking resistance, and lead leakage prevention stability.
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Summary: In halide perovskite solar cells, introducing RbCl doping effectively stabilizes the perovskite phase by converting excess PbI2 into an inactive compound. This strategy achieved a certified PCE of 25.6% for FAPbI(3) perovskite solar cells, with high device stability and minimal hysteresis effects.
Article
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Fei Wang et al.
Summary: This study investigated the mechanism of ionic-liquid-assisted perovskite film formation using a two-step method. The research found that the introduced ionic liquid methylammonium formate (MAFa) can lower the perovskite formation enthalpy and accelerate the crystallization process. The ionic liquid can also fill up halide vacancies in perovskite crystals, resulting in reduced trap states. With the help of MAFa IL, uniform perovskite films with larger grains and lower defect density were prepared, and the corresponding device efficiency exceeded 23% with significantly improved stability.
JOURNAL OF ENERGY CHEMISTRY
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Summary: The study investigates the use of a combination of bulk 3D and reduced dimensional perovskite layers to enhance the performance of perovskite solar cells, achieving efficiencies exceeding 22% and significantly improving device stability by controlling the ionic reaction during organic cation coating process to optimize the PQWs/3D architecture.
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Zhuojia Lin et al.
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Chao Liang et al.
Summary: Introducing molten salt spacers can produce phase-pure quantum wells and enhance the performance of solar cells. Two-dimensional Ruddlesden-Popper layered metal-halide perovskites have better stability and optoelectronic properties compared to their three-dimensional counterparts.
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