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The strain in perovskites mainly originates from the local lattice strain and external condition-induced strain, including the thermal expansion and lattice mismatch between the perovskite and substrate.
The chemical pressure induced by employing foreign ions is represented as lattice strain in crystals 56, 57. The inhomogeneity in a mixed perovskite film occasionally leads to a vertical gradient in residual strain 35.
In a relatively thinner perovskite film, the surface tension may impose greater strain effects that lead to the lattice compression. As the film thickness increases, strain relaxation results in the recovery of the lattice.
Thus, the strain can significantly change the lattice parameters of perovskite, and cracks in films appear and evolve during the thermal cycle , . On the other hand, the strain gradually exceeds the critical fracture stress, resulting in grain boundary cracking and even expanding into the grain interior.
Recently, Chen et al. revealed that this inhomogeneity in perovskite films perpendicular to the substrate resulted in the local lattice mismatch, then the lattice distortion of microscopic crystal structure, and consequently the local lattice strain (Fig. 2 d–g), which may be a type of microstrain.
Jones, T. W. et al. Lattice strain causes non-radiative losses in halide perovskites. Energy Environ. Sci. 12, 596–606 (2019). Pohl, U. W. Epitaxy of Semiconductors: Introduction to Physical Principles (Springer, 2013). Chen, Y. et al. Strain engineering and epitaxial stabilization of halide perovskites. Nature 577, 209–215 (2020).
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Since the first report of perovskite solar cells (PSCs) with an efficiency of 3.81% [1], the power conversion efficiency (PCE) of PSCs has skyrocketed to over 25% now [2].The high efficiency is generally obtained with mixed-cation halide perovskites due to the subtle modulation of physicochemical properties by suitable elements substitution [3], [4], [5].
Online Services Email ContactThe lattice strain caused by size misfits among 2D and 3D dual cations, and lead halide inorganic cages could be an important intrinsic factor contributing to the degradation of …
Online Services Email ContactImpact of 2D Ligands on Lattice Strain and Energy Losses in Narrow-Bandgap Lead–Tin Perovskite Solar Cells. ... Perovskite solar cells (PSCs) are in the focus of the …
Online Services Email ContactA molecule-triggered strain regulation and interface passivation strategy via the [2 + 2] cycloaddition reaction of 6-bromocoumarin-3-carboxylic acid ethyl ester, which absorbs harmful UV light, is proposed to …
Online Services Email ContactThe strain is caused by the thermal expansion mismatch between the perovskite material and substrate. The lattice strain is found to be an important intrinsic source of …
Online Services Email ContactThe lattice strain of a perovskite film is vital to the controllable growth and charge transport in perovskite solar cells (PSCs). In this work, a lead chloride (PbCl 2) assisted crystallization (LCAC) protocol is introduced for releasing the strain across the interface of a NiO x /perovskite, which induces a preferred (h00) crystal plane growth and grain homogenization.
Online Services Email ContactThe unfavorable phase transition originates from tensile strain in the FAPbI 3 crystal lattice, which undergoes structural reorganization for lattice strain balancing. In this work, we found that the ionic liquid (IL) could be used as the strain coordinator to balance the lattice strain for stability improvement of FAPbI 3 perovskite.
Online Services Email ContactThis could be contributed that the small-radius MA + and Cs + cations from chloride additives may incorporate into the lattice of FA-based perovskite, which can decrease the distortion of lattice planes induced by the large-radius FA cations, and facilitate to release the lattice strain related with the crystal distortion as shown in Fig. 1 e.
Online Services Email ContactPerovskite solar cells (PSCs) have gained tremendous attention due to their exceptional optoelectronic properties and facile solution processability [1,2].The inherent soft lattice structure of metal halide perovskite materials facilitates the ongoing development of flexible perovskite solar cells (F-PSCs) [3,4].This category of devices occupies notable advantages, …
Online Services Email ContactThe lifespan of halide perovskite solar cells (PSCs) is currently a major concern for the implementation and commercialization of the technology. Tensile and …
Online Services Email ContactIn contrast, compressive strain caused by lattice shrinkage can improve carrier transport, reduce trap state density, and enhance the performance and stability of PSCs, providing a strategy to transform tensile strain into compressive strain in perovskite films.[18], [19], [20] Tan et al. introduced bidentate imidazole (MZ-1) into the PbI 2 precursor to fabricate …
Online Services Email ContactDOI: 10.1016/J.JECHEM.2021.08.044 Corpus ID: 238690869; Facile lattice tensile strain compensation in mixed-cation halide perovskite solar cells @article{Wang2022FacileLT, title={Facile lattice tensile strain compensation in mixed-cation halide perovskite solar cells}, author={Shurong Wang and Jie Hu and Aili Wang and Yuying Cui and Bin Chen and Xiaobin …
Online Services Email ContactThe dynamic lattice evolution under illumination causes crowding of the perovskite grains, leading to large local strains near the grain boundaries (GBs), which thereby facilitates defect formation and iodine component loss in the region.
Online Services Email ContactIn this review paper, the residual strain of a polycrystalline halide perovskite film is systematically studied based on its structural inhomogeneity, which is closely correlated …
Online Services Email ContactWe then investigate the lattice strain in these two perovskite films by analyzing the out-of-plane 2θ XRD data based on Williamson−Hall (W−H) plot method, [] and …
Online Services Email ContactBy incorporating disordered microdomain lattice strain into perovskite materials, we have successfully attained a significant dual enhancement in cathodic electrochemical activity as well as poison resistance, thus offering an innovative and well-conceived approach for the design of high-performing and long-lasting catalysts for electrochemical ...
Online Services Email ContactHere, the authors rule out the restrictions of carrier lifetime on device performance and reveal the critical role of lattice strain in micron-scale thick perovskite films.
Online Services Email ContactThe lattice strain evaluated by the Williamson-hall plot of X-ray diffraction data decreased as the tolerance factor was close to one. The efficiency of the Sn-perovskite solar cell was enhanced as the lattice strain decreased. Among them, EA 0.1 (FA 0.75 MA 0.25) 0.9 SnI 3 having lowest lattice strain gave the best result of 5.41%. Because the ...
Online Services Email ContactRelevant research indicates that residual strain in perovskite solar cells has a negative impact on charge carrier dynamics and interface energy level alignment [18].Additionally, there is a direct relationship between the defect density in perovskite materials and residual strain [19].The formation energy of halide vacancies increases under compressive strain and …
Online Services Email ContactHere, we report on the effects of alkali metal chloride treatment at the SnO 2 /perovskite interface and its ability to regulate lattice strain and thus improve the halide perovskite stability. We find …
Online Services Email ContactRequest PDF | On Dec 1, 2024, Xiaodan Yu and others published Localized lattice strain in perovskite oxides for enhanced oxygen reduction reaction kinetics in solid oxide fuel cells | Find, read ...
Online Services Email ContactPerovskite lattice distortion induced by residual tensile strain from the thermal expansion mismatch between electron‐transporting layer (ETL) and perovskite film causes a sluggish charge ...
Online Services Email ContactWe reveal the key factor to be the lattice strain caused by thermal expansion and shrinking of the perovskite during operation, an effect that gradually relaxes under the...
Online Services Email ContactWe begin with a discussion of two different origins of strain/stress in perovskites: (i) local lattice strain, which originates from the ionic size mismatch between the A cation and the lead halide cage size in ABX 3, …
Online Services Email ContactWhile specific strain management approaches permit the effective regulation of lattice strain, interfacial stress–strain dynamics, and surface properties of perovskite films, …
Online Services Email Contactdots (QDs) within bulk perovskite matrix9 and implement strain engineering (Fig-ure 1B) via lattice mismatch at the QD/matrix perovskite interface, a contrast to prior QD-in-matrix studies that sought to minimize strain.9,23 The perovskite matrix undergoes uniform lattice contraction in all directions, i.e., compressive hydro-
Online Services Email ContactSimilarly, Oh et al. suggested that the lattice strain relaxation is realized by the intercalation of pseudo-halide (BF 4 −) into mixed Pb–Sn perovskite (FA 0.5 MA 0.5 Pb 0.5 Sn 0.5 I 3) that is …
Online Services Email ContactThe strain can be reduced by point defect formation; this mechanism of lattice relaxation via vacancy formation has been observed in oxide perovskites, as well as in metal halide perovskites. 54, 55 These defects are suggested to trigger ionic migration and phase separation and to accelerate degradation. 56, 57 As shown in Figures 6 C and 6D, the PL of a …
Online Services Email Contact[20], [21], [22] Different crystal growth rates in perovskite films induce lattice strain, which may lower the energy barrier for defect formation and promote undesirable phase transitions in perovskite. ... When combined with our previous transparent perovskite solar cell technology, the highest PCE for semi-transparent devices reached 19.21 % ...
Online Services Email ContactThe residual lattice strain in the hot-printed perovskite layer was effectively decreased with addition of methylammonium bromide additive, which also largely increased the perovskite grain size. This morphological …
Online Services Email ContactFormamidinium lead iodide (FAPbI3) perovskite possesses an ideal optical bandgap and is a potential material for fabricating the most efficient single‐junction perovskite solar cells (PSCs). Nevertheless, large formamidinium (FA) cations result in residual lattice strain, which reduces the power conversion efficiency (PCE) and operational stability of PSCs. …
Online Services Email ContactLattice mismatch is crucial for the efficiency and lifetime of perovskite solar cells because it affects interfacial charge behavior and perovskite degradation. This review discusses the effects of lattice mismatch on strain, …
Online Services Email ContactIn this work, we systematically investigated the effect of chloride additives through the chloride-additive composition engineering on the crystal quality, residual strain, …
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