Fully Air-Processed Dynamic Hot-Air-Assisted M:CsPbI2Br (M: Eu2+, In3+) for Stable Inorganic Perovskite Solar Cells

Mali, Sawanta S.; Patil, Jyoti V.; Shinde, Pravin S.; Miguel, Gustavo de; Hong, Chang Kook

doi:10.1016/j.matt.2020.11.008

Cited by 127 publications

(121 citation statements)

References 84 publications

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“…An alternative field of exploration, in this sense, is the solvent‐vapor post‐annealing method: the hot‐solvent vapor plasticizes the layered perovskite films and induce their reorganization/reorientation 204,205 . In this broad avenue of post‐annealing methods, we speculate that hot‐air annealing, recently demonstrated to improve the crystallinity and film quality of 3D perovskites, 206,207 may also be a promising option to explore in 2D‐PSCs.…”

Section: Perspectivesmentioning

confidence: 99%

Layered metal halide perovskite solar cells: A review from structure‐properties perspective towards maximization of their performance and stability

Holanda

Moral

Marchezi

et al. 2021

EcoMat

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Perovskite solar cells (PSCs) technology is now reaching its full potential in terms of power conversion efficiency, but still presenting problems related to long‐term stability under operating conditions. One of the most promising alternatives to PSCs is the layered PSCs (2D‐PSCs). Layered perovskites present a huge compositional variety, which can be used to directly tune photophysical characteristics that influence the operational mechanisms of the devices. This review addresses the structural organization of both the organic and inorganic sublattices, focusing on how the structure influences the quantum and dielectric confinement, phonons and charge carriers' dynamics, charge mobility, and structural defects. We discuss the relation between the structure‐properties of layered perovskites with the performance of solar cells. We, then, offer insights into how these characteristics have been controlled in the assembly of 2D‐PSCs to improve their efficiency and stability. We conclude by giving a perspective of future developments and open areas of exploration that might impact the progress of this rapidly growing technology.

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Section: Perspectivesmentioning

confidence: 99%

Layered metal halide perovskite solar cells: A review from structure‐properties perspective towards maximization of their performance and stability

Holanda

Moral

Marchezi

et al. 2021

EcoMat

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“…Organic‐inorganic hybrid perovskites, exhibiting large absorption coefficient, high carrier mobility, long carrier diffusion length, low exciton binding energy, and controllable optical band gap, [ 1–4 ] have been widely researched in terms of both scientific theory and photovoltaic applications, which has motivated the rapid development of the power conversion efficiency of perovskite solar cells (PSCs) in recent years. [ 5–15 ] However, they still suffer severely from the lack of long‐term durability.…”

Section: Introductionmentioning

confidence: 99%

Fluoroethylamine Engineering for Effective Passivation to Attain 23.4% Efficiency Perovskite Solar Cells with Superior Stability

Zhang

et al. 2021

Advanced Energy Materials

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Defects in perovskite layers usually cause nonradiative recombination, impairing device performance and stability. Here, fluoroethylamine (FC2H4NH3, FEA) is integrated into the perovskite film to passivate defects. By engineering of different amounts of fluorine in the molecule, it is found that when 2‐fluoroethylamine (1FEA), in which one F bonds to the first carbon atom at the end of the molecule's structure, is used, the F atoms appear to be distributed throughout the bulk to the very surface. When 2,2‐difluoroethylamine (2FEA) and 2, 2, 2‐trifluoroethylamine (3FEA) are used, F is prone to distribution in the bulk of the perovskite film, while there appears to be no detectable F content on the surface. With the FEA passivation, the nonradiative recombination is suppressed, the carrier‐lifetime is improved to 840.01 ns, and the film‐air interface offers greater hydrophobicity, especially in the case of 1FEA, where because it is distributed throughout the film thickness, it passivates more defects and delivers the highest efficiency, as much as 23.40%. The device with 3FEA shows the best environmental stability; specifically, the bare cell without any encapsulation maintains 87% of its initial efficiency after exposure to the ambient environment for 1200 h.

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“…Most often the defective perovskite surface is modified by organic functional molecules, such as ammonium halides, fullerene derivatives, zwitterions and polymers, which can passivate the charge traps by chemical interactions or charge neutralization [ 15 – 23 ]. Meanwhile, the perovskite community also gained inorganic passivation materials that are believed to be intrinsically more stable, which have indeed advanced the performance and stability of PSCs [ 24 – 28 ]. For instance, decorating the perovskite surface with a potassium halide layer can immobilize the surplus halides through complexing with potassium into benign compounds, and maximized the photoluminescence quantum yields up to 95% as well as high carrier mobility over 40 cm 2 V −1 s −1 [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Mediating the Local Oxygen-Bridge Interactions of Oxysalt/Perovskite Interface for Defect Passivation of Perovskite Photovoltaics

Lin

Lian

et al. 2021

Nano-Micro Lett.

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Passivation, as a classical surface treatment technique, has been widely accepted in start-of-the-art perovskite solar cells (PSCs) that can effectively modulate the electronic and chemical property of defective perovskite surface. The discovery of inorganic passivation compounds, such as oxysalts, has largely advanced the efficiency and lifetime of PSCs on account of its favorable electrical property and remarkable inherent stability, but a lack of deep understanding of how its local configuration affects the passivation effectiveness is a huge impediment for future interfacial molecular engineering. Here, we demonstrate the central-atom-dependent-passivation of oxysalt on perovskite surface, in which the central atoms of oxyacid anions dominate the interfacial oxygen-bridge strength. We revealed that the balance of local interactions between the central atoms of oxyacid anions (e.g., N, C, S, P, Si) and the metal cations on perovskite surface (e.g., Pb) generally determines the bond formation at oxysalt/perovskite interface, which can be understood by the bond order conservation principle. Silicate with less electronegative Si central atoms provides strong O-Pb motif and improved passivation effect, delivering a champion efficiency of 17.26% for CsPbI2Br solar cells. Our strategy is also universally effective in improving the device performance of several commonly used perovskite compositions.

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Fully Air-Processed Dynamic Hot-Air-Assisted M:CsPbI2Br (M: Eu2+, In3+) for Stable Inorganic Perovskite Solar Cells

Cited by 127 publications

References 84 publications

Layered metal halide perovskite solar cells: A review from structure‐properties perspective towards maximization of their performance and stability

Layered metal halide perovskite solar cells: A review from structure‐properties perspective towards maximization of their performance and stability

Fluoroethylamine Engineering for Effective Passivation to Attain 23.4% Efficiency Perovskite Solar Cells with Superior Stability

Mediating the Local Oxygen-Bridge Interactions of Oxysalt/Perovskite Interface for Defect Passivation of Perovskite Photovoltaics

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