Homogeneously Large Polarons in Aromatic Passivators Improves Charge Transport between Perovskite Grains for > 24% Efficiency in Photovoltaics

Article Chemistry, Multidisciplinary

Highly Efficient and Stable Dion-Jacobson Perovskite Solar Cells Enabled by Extended π-Conjugation of Organic Spacer

Zhiyuan Xu et al.

Summary: The newly developed TTDMA spacer enables 2D DJ perovskite solar cells to achieve high efficiency and long-term stability, with significant advantages in various performance indicators confirmed by experiments.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Donor-π-Acceptor Type Porphyrin Derivatives Assisted Defect Passivation for Efficient Hybrid Perovskite Solar Cells

Chi-Lun Mai et al.

Summary: The results of the study demonstrate that D-pi-A type porphyrin derivatives are promising passivators for improving the cell performance of PSCs.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Rational Surface-Defect Control via Designed Passivation for High-Efficiency Inorganic Perovskite Solar Cells

Xiaojing Gu et al.

Summary: Iodine vacancies and undercoordinated Pb2+ are the main causes of nonradiative charge recombination in all-inorganic perovskite films, while passivation with histamine (HA) significantly reduces surface trap density and prolongs charge lifetime, leading to an increased solar cell efficiency.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Intramolecular Electric Field Construction in Metal Phthalocyanine as Dopant-Free Hole Transporting Material for Stable Perovskite Solar Cells with >21 % Efficiency

Zefeng Yu et al.

Summary: Ni phthalocyanine (NiPc)with methoxyethoxy units as HTMs showed improved conductivity and hole mobility in PSCs, achieving a record efficiency of 21.23%. The extracted holes in NiPc are mainly concentrated on the phthalocyanine core and transferred between molecules, demonstrating good stability in moisture, heating, and light.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Improving the Performance of Perovskite Solar Cells via a Novel Additive of N,1-Fluoroformamidinium Iodide with Electron-withdrawing Fluorine Group

Chao Liu et al.

Summary: The novel additive F-FAI enhances the crystallinity, defect passivation, and downshifts the Fermi level of MAPbI(3), thereby improving charge transfer and built-in field in printable triple mesoscopic PSCs. Additionally, F-FAI also promotes charge transport in MAPbI(3), resulting in a higher power conversion efficiency compared to devices with guanidinium iodide additives.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Grain Boundary Engineering with Self-Assembled Porphyrin Supramolecules for Highly Efficient Large-Area Perovskite Photovoltaics

Zihan Fang et al.

Summary: Grain boundary management is crucial for the performance of polycrystalline perovskite solar cells, and a designed supramolecular binder can simultaneously passivate defects and promote carrier transport, leading to improved efficiency and stability. The NiP-doped PSCs achieved a certified efficiency of 22.1% and retained over 80% initial performance after continuous illumination or heating for 3000 hours at 85 degrees C.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Multidisciplinary Sciences

Efficient perovskite solar cells via improved carrier management

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.

NATURE (2021)

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Article Multidisciplinary Sciences

Reconfiguring the band-edge states of photovoltaic perovskites by conjugated organic cations

Jingjing Xue et al.

Summary: The electronic properties of metal-halide perovskites are mainly influenced by the structural and compositional variations in the inorganic B-X framework, while A-site cations primarily stabilize the lattice. The incorporation of pi-conjugated pyrene-containing A-site cations has been shown to extend electronic states, influencing surface band edges and improving carrier dynamics and power conversion efficiencies in perovskites.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Pseudo-halide anion engineering for α-FAPbI3 perovskite solar cells

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.

NATURE (2021)

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Article Multidisciplinary Sciences

Interfacial toughening with self-assembled monolayers enhances perovskite solar cell reliability

Zhenghong Dai et al.

Summary: The use of iodine-terminated self-assembled monolayer (I-SAM) in perovskite solar cells (PSCs) leads to increased adhesion toughness at the interface, improved power conversion efficiency, reduced hysteresis, and enhanced operational stability. This is attributed to a decrease in hydroxyl groups at the interface and higher interfacial toughness achieved with I-SAM treatment.

SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells

Ke Ma et al.

Summary: A novel multifunctional semiconducting organic ammonium cationic interface modifier is reported to boost the efficiency and stability of perovskite solar cells, achieving an excellent power conversion efficiency of 22.06%. By improving energy level alignment and stabilizing the interface, ion migration and halide phase segregation are suppressed, leading to long-term operational stability.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Marked Passivation Effect of Naphthalene-1,8-Dicarboximides in High-Performance Perovskite Solar Cells

Zhihao Zhang et al.

Summary: This study uses two structurally similar polyaromatic molecules to improve the lifetime and efficiency of perovskite solar cells, successfully designing a more effective passivator and achieving higher device efficiency.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Robust Molecular Dipole-Enabled Defect Passivation and Control of Energy-Level Alignment for High-Efficiency Perovskite Solar Cells

Bing Wang et al.

Summary: This study successfully enhanced the performance of perovskite solar cells by passivating defects and modulating energy level alignment at the interface using polar chlorine-terminated silane molecules.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Reducing Defects Density and Enhancing Hole Extraction for Efficient Perovskite Solar Cells Enabled by π-Pb2+ Interactions

Lirong Wen et al.

Summary: Molecular doping using organic small molecules with fused tricyclic core can reduce defects density and improve performance of perovskite solar cells by enhancing intermolecular pi-Pb2+ interactions and suppressing nonradiative recombination. This strategy also facilitates hole extraction and has significantly increased device efficiency with negligible hysteresis.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Lead and Iodide Fixation by Thiol Copper(II) Porphyrin for Stable and Environmental-Friendly Perovskite Solar Cells

Guo-Bin Xiao et al.

CCS Chemistry (2021)

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Article Chemistry, Multidisciplinary

Sulfonate-Assisted Surface Iodide Management for High-Performance Perovskite Solar Cells and Modules

Ruihao Chen et al.

Summary: Surface iodide management using cesium sulfonate can stabilize lead halide perovskite surfaces, reduce surface defects and nonradiative recombination, and improve the efficiency and stability of perovskite solar cells.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Multidisciplinary Sciences

Lead halide-templated crystallization of methylamine-free perovskite for efficient photovoltaic modules

Tongle Bu et al.

Summary: Efficient and stable perovskite layers are crucial for the commercialization of perovskite solar cells. A lead halide-templated crystallization strategy has been developed to print formamidinium-cesium lead triiodide perovskite films, achieving high-quality large-area films with controlled nucleation and growth. An unencapsulated device with 23% efficiency and excellent long-term thermal stability has been achieved, showcasing the potential for practical application in the future.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Liquid medium annealing for fabricating durable perovskite solar cells with improved reproducibility

Nengxu Li et al.

Summary: The liquid medium annealing (LMA) technology shows promise in producing high-quality perovskite films and photovoltaic devices with improved crystal growth modulation and film uniformity. This method opens up an effective avenue for scalable and reproducible quality improvement in perovskite films and devices.

SCIENCE (2021)

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Article Chemistry, Multidisciplinary