Stable perovskite solar cells with 22% efficiency enabled by inhibiting migration/loss of iodide ions

Article Chemistry, Applied

Bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize energy losses for efficient and stable perovskite solar cells

Baibai Liu et al.

Summary: A bottom-up holistic carrier management strategy is proposed in this study to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics, induced synergistically by multiple chemical bonds.

JOURNAL OF ENERGY CHEMISTRY (2023)

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Article Chemistry, Multidisciplinary

Fluorinated Black Phosphorene Nanosheets with Robust Ambient Stability for Efficient and Stable Perovskite Solar Cells

Tao Liu et al.

Summary: This study introduces a feasible strategy to enhance the photovoltaic performance and long-term stability of black phosphorus-based perovskite solar cells by introducing high-quality fluorinated BP nanosheets with improved interfacial properties. The optimized interface structure results in higher power conversion efficiency and improved stability of the devices.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Engineering, Environmental

Passivating buried interface via self-assembled novel sulfonium salt toward stable and efficient perovskite solar cells

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)

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Article Chemistry, Physical

24.8%-efficient planar perovskite solar cells via ligand-engineered TiO2 deposition

Hao Huang et al.

Summary: In this research, a ligand-engineered deposition strategy was proposed to improve the performance of planar perovskite solar cells. By using tartaric acid as the ligand, particle aggregation was effectively inhibited, and the interfacial contact impedance was reduced while the electron extraction was enhanced. The obtained PCE of 24.8% with a fill factor exceeding 0.83 is the highest reported among TiO2-based planar PSCs so far.

JOULE (2022)

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Article Chemistry, Physical

Tailoring multifunctional anion modifiers to modulate interfacial chemical interactions for efficient and stable perovskite solar cells

Qixin Zhuang et al.

Summary: In this paper, a universal anion modification strategy is reported to enhance the photovoltaic performance of perovskite solar cells (PSCs) by introducing a series of guanidinium salts with different anions at the perovskite/SnO2 interface. The modification strategy improves the interfacial energy band alignment, promotes crystallization, and enhances the thermal and ambient stabilities of the devices.

NANO ENERGY (2022)

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Article Chemistry, Multidisciplinary

Inhibition of PbI2-induced defects by doping MABr for high-performance perovskite solar cells

Yao Yao et al.

Summary: A facile method was developed in this study to efficiently suppress the residual PbI2 and related defects in perovskite films by a two-step spin-coating process, significantly improving the carrier lifetime and grain growth of the alpha-FAPbI(3) films, and further enhancing the performance of perovskite solar cells.

NANOSCALE (2022)

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Review Chemistry, Multidisciplinary

Halide Ion Migration in Perovskite Nanocrystals and Nanostructures

Prashant Kamat et al.

Summary: This article mainly discusses the influence of the optical and electronic properties of metal halide perovskites on the operation and long-term stability of solar cells, as well as the role of halide migration in solar cell performance.

ACCOUNTS OF CHEMICAL RESEARCH (2021)

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Article Multidisciplinary Sciences

Engineering fluorinated-cation containing inverted perovskite solar cells with an efficiency of >21% and improved stability towards humidity

Xiao Wang et al.

Summary: Efficient and stable perovskite solar cells with simple active layers are desirable for manufacturing, but the formation of a two-dimensional component in the perovskite film compromises the performance. In this study, low temperature fabrication of highly efficient and stable inverted solar cells was achieved by adding a fluorinated lead salt, resulting in increased crystal size and orientation, as well as enhanced stability under high humidity conditions.

NATURE COMMUNICATIONS (2021)

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Article Nanoscience & Nanotechnology

Diluted-CdS Quantum Dot-Assisted SnO2 Electron Transport Layer with Excellent Conductivity and Suitable Band Alignment for High-Performance Planar Perovskite Solar Cells

Zheng Lv et al.

Summary: A novel CdS QD-assisted SnO2 ETL has been developed to improve the efficiency and stability of PSCs. The addition of CdS QDs enhances the performance of SnO2 ETL and promotes the enhancement of photovoltaic performance.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Chemistry, Multidisciplinary

Constructing All-Inorganic Perovskite/Fluoride Nanocomposites for Efficient and Ultra-Stable Perovskite Solar Cells

Youchao Wei et al.

Summary: Organic-inorganic hybrid perovskite solar cells have faced challenges in achieving both high efficiency and long-term stability. A new CsPbI3/CaF2 perovskite/fluoride nanocomposite shows promise in addressing these issues, delivering efficient and ultra-stable performance. By incorporating CaF2 into the crystal lattice of CsPbI3 perovskite, the nanocomposite effectively passivates defects and suppresses ion migration, resulting in improved power conversion efficiency and extended device lifetime compared to control devices.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Engineering, Environmental

Interfacial defect passivation and stress release by multifunctional KPF6 modification for planar perovskite solar cells with enhanced efficiency and stability

Huan Bi et al.

Summary: This study presents a multifunctional interface modification strategy using KPF6 molecule to improve the interface contact and enhance the efficiency and stability of PSCs. The KPF6 modification leads to improved film quality, defect passivation, and stress release, resulting in a significant enhancement in efficiency and stability of the devices.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Optics

Stable and low-photovoltage-loss perovskite solar cells by multifunctional passivation

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.

NATURE PHOTONICS (2021)

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Article Chemistry, Physical

Ternary Two-Step Sequential Deposition Induced Perovskite Orientational Crystallization for High-Performance Photovoltaic Devices

Chun-Hao Chen et al.

Summary: The two-step sequential deposition method incorporating cesium acetate and formamidinium methylammonium cesium as raw materials can improve the perovskite crystallization process, further enhancing the efficiency and quality of perovskite films.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Applied

Simultaneous passivation of bulk and interface defects through synergistic effect of anion and cation toward efficient and stable planar perovskite solar cells

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.

JOURNAL OF ENERGY CHEMISTRY (2021)

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Article Chemistry, Physical

Interfacial Defect Passivation and Stress Release via Multi-Active-Site Ligand Anchoring Enables Efficient and Stable Methylammonium-Free Perovskite Solar Cells

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 (2021)

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Article Materials Science, Multidisciplinary

Highly efficient and stable perovskite solar cells enabled by a fluoro-functionalized TiO2 inorganic interlayer

Xiang Deng et al.

Summary: Interface engineering using robust fluoroterminated TiO2 nanosheets (F-TiO2 NSs) as interlayers between perovskite and electron-transporting layers greatly enhances the performance and stability of inverted perovskite solar cells. The flat morphology of F-TiO2 NSs allows for close contact with perovskite and abundant surface fluoro groups to interact with ions, preventing the formation of cation vacancies and alleviating surface defects, leading to a remarkable power conversion efficiency of 22.86%. Devices with F-TiO2 NSs interlayers also exhibit enhanced operational stability, maintaining over 90% of their initial efficiencies after 1,000 hours of monitoring at the maximum power point under day/night cycles.

MATTER (2021)

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Article Chemistry, Physical

Enhancing the stability of perovskite solar cells through cross-linkable and hydrogen bonding multifunctional additives

Xiaodong Li et al.

Summary: By introducing the multifunctional additive DPPA, ion migration in perovskite solar cells can be effectively inhibited, leading to increased efficiency and stability.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical