Related references
Note: Only part of the references are listed.
Review
Chemistry, Applied
Jian Yang et al.
Summary: Metal halide perovskite solar cells (PSCs) have great potential to be the next-generation photovoltaic devices due to their simple fabrication techniques, low cost, and high power conversion efficiency. However, improving the stability of these devices remains a critical challenge. Ionic liquids (ILs) have been found to play multiple roles in achieving efficient and stable PSCs. ILs, consisting of large organic cations and organic or inorganic anions, possess weak electrostatic attraction and high ionic conductivity, making them non-volatile, non-flammable, and thermally and electrochemically stable. The roles of ILs in PSCs vary with their composition, and this article summarizes the effects of anions and cations in various aspects of PSCs.
JOURNAL OF ENERGY CHEMISTRY
(2023)
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Jaewang Park et al.
Summary: Controlling the crystallinity and surface morphology of perovskite layers is crucial for achieving high-efficiency perovskite solar cells. By adding alkylammonium chlorides (RACl) to a-formamidinium lead iodide (FAPbI(3)), the crystallization process and surface morphology of the perovskite thin films can be controlled. The resulting perovskite thin layers facilitate the fabrication of perovskite solar cells with a high power-conversion efficiency of 26.08%.
Article
Chemistry, Physical
Lidan Liu et al.
Summary: This study compares the effects of nicotinamide and its derivative 6-Methylnicotinamide on the defect passivation and photovoltaic properties of perovskite materials. It is found that 6-Methylnicotinamide can form a stronger bond with lead ions, improving the formation energy of lead-related defects and enhancing the quality and surface smoothness of perovskite absorbers. The electronic structure and electron cloud distribution of 6-Methylnicotinamide also contribute to the high efficiency and stability of perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Chunpeng Fu et al.
Summary: This study provides a systematic review on the role of amines in formamidinium-based perovskites. The construction mechanism of different structural amines on functional perovskite crystals is analyzed, and the influence of amine molecules on specific perovskite properties is evaluated. The design rules of amine molecules for high-performance formamidinium-based perovskites are summarized, and directions for the future development of additive molecules are proposed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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Article
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Kun Yang et al.
Summary: Intramolecular noncovalent interactions have been utilized to develop dopant-free hole-transporting materials for high-performance perovskite solar cells. By incorporating S center dot center dot center dot O interaction into the molecular backbones, the resulting materials showed enhanced thermal properties, improved film morphology, and promising hole mobilities. Overall, this work provides a practical approach to design charge transporting layers with high intrinsic mobilities for high-performance PVSCs.
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Article
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Chen Chen et al.
Summary: Introducing polyacrylonitrile (PAN) for passivating uncoordinated lead cations in perovskite films has been successful in improving device efficiency and open-circuit voltage, increasing ion migration activation energy, and enhancing operational stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
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Renxing Lin et al.
Summary: Researchers have developed ammonium-cation-passivated Pb-Sn perovskites with long diffusion lengths, enabling high-efficiency all-perovskite tandem solar cells. By enhancing the adsorption of the passivator using a stronger surface-passivator interaction, the carrier diffusion length within Pb-Sn perovskites is doubled, resulting in an efficiency of over 22%. The certified efficiency of 26.4% achieved in the all-perovskite tandem solar cells exceeds that of the best-performing single-junction perovskite solar cells.
Article
Chemistry, Physical
Xuejie Zhu et al.
Summary: A new approach using an ionic liquid was designed to improve the stability and performance of metal-halide perovskite solar cells. Experimental results showed that this method effectively enhances the photovoltaic performance while exhibiting outstanding stability characteristics.
ADVANCED ENERGY MATERIALS
(2022)
Review
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Kai Wang et al.
Summary: Single-junction photovoltaics have a limited efficiency due to energy losses, but these losses can be overcome by using halide perovskite materials, which have various advantages that can boost the photovoltage and photocurrent.
Article
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Yawei Miao et al.
Summary: Surface defects significantly affect the performance of perovskite solar cells. This study introduces a small molecular material, CMAI, which can passivate lead defects, fill iodide ion vacancies, reduce trap state density, and improve carrier transport. By optimizing the treatment conditions, the CMAI-treated device achieves an impressive efficiency of 21.59% with excellent humidity stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
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Xin Zuo et al.
Summary: A simple and effective buried interface passivation strategy based on cation engineering was developed for perovskite solar cells. The modifiers CDSC and DPAH can passivate defects on the surface of perovskite and SnO2 films, and reduce interfacial energy barrier by improving energy band alignment. CDSC demonstrated superior defect passivation and energy band modulation compared to DPAH.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Chemistry, Physical
Zhiyong Liu et al.
Summary: This review summarizes the fundamental physical properties of formamidinium lead iodide (FAPbI(3)) perovskite materials and discusses the factors influencing their stability. The phase evolution with temperature is established by reviewing previous reports. Furthermore, a range of strategies to stabilize FA-rich perovskite are summarized, and new viewpoints for improving the efficiency and stability of perovskite solar cells are provided.
ADVANCED ENERGY MATERIALS
(2022)
Review
Energy & Fuels
Xue Dong et al.
Summary: Formamidinium lead triiodide (FAPbI(3)) is a promising active material for perovskite solar cells due to its narrow bandgap, broad light absorption spectra, and high thermal stability. However, the formation of the unstable nonperovskite phase is a major obstacle for its commercialization. This review summarizes various strategies to stabilize FAPbI(3) and discusses methods for preparing high-efficiency FAPbI(3) perovskite films. Future research directions for reproducible and large-area FAPbI(3)-based photovoltaics are also proposed.
Article
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Xiaofei Ji et al.
Summary: Nonradiative recombination caused by interface defects and nonoptimal energy level alignment is a major limitation for the performance improvement of perovskite solar cells. Introducing interfacial materials with imide and thiadiazole groups can effectively suppress nonradiative recombination and enhance the efficiency of PSCs.
Article
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Xinyi Du et al.
Summary: In this study, the additive DIAI is used to eliminate the intermediate phase in perovskite solar cells, resulting in larger grain size and improved crystalline quality. DIAI is also effective at passivating surface defects, leading to increased device efficiency and stability.
ADVANCED MATERIALS
(2022)
Article
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Yang Zhao et al.
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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Tiankai Zhang et al.
Summary: This study proposes a new doping strategy for perovskite solar cells, using stable organic radicals as dopants and ionic salts as doping modulators. The strategy improves the performance and stability of the devices and could inspire further optimization in other optoelectronic devices.
Article
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Dorothee Menzel et al.
Summary: Through ultra-sensitive near-UV photoelectron spectroscopy, the energy level alignment and defect formation at the perovskite/C-60 interface are investigated. It is found that the fullerene C-60 as the electron transport layer limits the open circuit voltage in metal halide perovskite solar cells. The voltage enhancement with the incorporation of a LiF interlayer at the interface can be attributed to a dipole effect and the presence of fixed charges.
ADVANCED ENERGY MATERIALS
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Yawei Miao et al.
Summary: This study reports the use of an ionic liquid with multifunctional cations and Cl anion to improve the performance of FAPbI(3) solar cells. The treatment suppresses nonradiative recombination and phase transition in the perovskite film, leading to significantly improved efficiency and stability of the solar cells.
Review
Chemistry, Physical
Duoling Cao et al.
Summary: Various types of imperfections in metal halide perovskite layers and interfaces have significant effects on the performance and stability of perovskite solar cells. Effective defect-passivation strategies have been successfully applied to improve film quality and device properties. Characterization methods play a crucial role in understanding defect passivation mechanisms and developing more efficient strategies.
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Fei Wang et al.
Summary: Perovskite solar cells have attracted attention for their high efficiency, absorption coefficients, tunability, and manufacturing protocols. However, long-term stability remains a challenge. Ionic liquids have been used to improve stability and performance through film evolution and modifications of photophysical properties. This review discusses the reasons for instability, strategies for stability improvement, and challenges and prospects of perovskite solar cells.
Article
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Erdi Akman et al.
Summary: The study addresses the issue of degradation in perovskite solar cells (PSCs) over time, caused by environmental factors such as humidity, heat, and light. By treating the perovskite surfaces with polyTPD molecules, the research significantly suppresses defect-mediated non-radiative recombination in PSCs, resulting in improved efficiency and stability. The ultra-hydrophobic polyTPD passivant also helps to prevent moisture penetration, leading to a high retention of initial efficiencies after storage and operational conditions.
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(2021)
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Yawei Miao et al.
Summary: Introducing the compound PFP(2)TTz into perovskite solar cells effectively modulates defects and inhibits UV light, leading to significant enhancements in spectral response and device stability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
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Chengxi Zhang et al.
Summary: Perovskite solar cells (PSCs) have rapidly advanced in technology, but efforts are still needed to reduce voltage loss and achieve higher open-circuit voltage. A comprehensive overview of the lowest voltage loss values and strategies for suppression is lacking.
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Advanced Energy Materials
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Xuefeng Xia et al.
Summary: In this study, a functionalized ionic liquid crystal was developed as a novel chemical additive for high-efficiency and stable perovskite solar cells. The inclusion of the additive greatly improved the quality and stability of perovskite films, leading to a significant increase in power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Matteo Degani et al.
Summary: This study presents a dual interfacial modification approach by incorporating large organic cations at both the bottom and top interfaces of the perovskite active layer, leading to simultaneous improvement in both open-circuit voltage and fill factor of the devices, reaching a champion device efficiency of 23.7%. This dual interfacial modification is fully compatible with bulk modification of the perovskite active layer by ionic liquids, resulting in efficient and stable inverted architecture devices.
Article
Chemistry, Physical
Yawei Miao et al.
Summary: The study demonstrates that the in-situ secondary annealing method using quaternary ammonium salt TEAH can homogeneously distribute on the perovskite surface, effectively passivate surface and boundary defects, and improve hole extraction efficiency, ultimately leading to enhanced power conversion efficiency and stability of perovskite solar cells.
JOURNAL OF POWER SOURCES
(2021)
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Wei Hui et al.
Summary: A new method for synthesizing stable black-phase formamidinium lead iodide (α-FAPbI(3)) was reported, which enables the stable synthesis of α-FAPbI(3) under high temperature and humidity conditions, and maintains high efficiency under light stress.
Article
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Cong Zhang et al.
Summary: The study demonstrates a defect passivation strategy using potassium sulphate (K2SO4) modification, which effectively improves the efficiency and stability of perovskite solar cells by minimizing bulk and interface nonradiative recombination losses.
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Chuansu Yang et al.
Summary: This study demonstrates an effective interfacial molecular doping strategy and energy level regulation approach to improve the performance of perovskite solar cells. By utilizing carbazole-based HTMs CZ-As and CZ-Py, the PSCs show impressive power conversion efficiency of up to 23.5% and good long-term stability.
ACS ENERGY LETTERS
(2021)
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Baibai Liu et al.
Summary: The modification of perovskite films with the multi-active-site Lewis base ligand MTDAA effectively reduces defect density, increases carrier lifetime, and almost completely releases interfacial residual stress. The PCE is boosted after MTDAA modification, and the devices maintain high stability after aging tests.
ACS ENERGY LETTERS
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Jeong-Hyeon Kim et al.
Summary: Increasing PyI concentration enhances photovoltaic performance, while PpI is optimized at 5mM. PyI treatment forms a beneficial PyI layer for hole extraction, while PpI treatment forms an insulating PpPbI(3) that blocks charge separation.
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Yuzhuo Zhang et al.
Summary: A depth-dependent manipulation strategy is demonstrated to concurrently modulate the bulk and interfacial defects in perovskite films, resulting in improved efficiency of PSCs. This strategy provides new insights into spatial defect modulation and may open up promising ways for defect modulator design for highly efficient perovskite optoelectronic devices.
ENERGY & ENVIRONMENTAL SCIENCE
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Review
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Xin Wu et al.
Summary: Hybrid metal-halide perovskite solar cells have gained unprecedented attention for their superior photovoltaic performance and low-cost fabrication, achieving high power conversion efficiency through understanding the structure-property relationship and carrier dynamics. The evolution of heterojunction design and multijunction structures plays crucial roles in enhancing efficiency, aiming to surpass 30% PCE in the future.
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Dong-Ho Kang et al.
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