Effect of temperature on the formation of highly crystalline lead-free perovskite Cs3Sb2Br9 hexagonal microdisks

Din, Ummi Kalsom Noor; Mohamed, Mohd Ambri; Salleh, Muhamad Mat; Aziz, Tengku Hasnan Tengku Abdul

doi:10.1007/s10854-022-08297-4

“…It was suggested that the addition of 2D perovskite promoted a preferred (110) orientation of the 3D perovskite with better crystallinity. [37] In addition, the 3D perovskite film showed a noticeable peak at 12.7°corresponding to the residual PbI 2 crystals, which was vanished in the 2D/3D hybrid film. This was consistent with film morphological features shown by the scanning electron microscope (SEM) images in Figure 3b and c, where the white areas in 3D film presented unreacted PbI 2 .…”

Section: Resultsmentioning

confidence: 97%

“…Comparing the XRD patterns of pure 3D and 2D/3D hybrid film in Figure 3a, we observed a more intense and sharper diffraction peak from the (110) lattice plane in the hybrid film, with a narrower full‐width at half ‐maximum (FWHM) from 0.22° (3D) to 0.16° (2D/3D). It was suggested that the addition of 2D perovskite promoted a preferred (110) orientation of the 3D perovskite with better crystallinity [37] . In addition, the 3D perovskite film showed a noticeable peak at 12.7° corresponding to the residual PbI 2 crystals, which was vanished in the 2D/3D hybrid film.…”

Section: Resultsmentioning

confidence: 99%

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

Han

¹

,

Wang

²

,

Liu

³

et al. 2023

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Despite the great progress of flexible perovskite solar cells (f-PSCs), it still faces several challenges during the homogeneous fabrication of high-quality perovskite thin films, and overcoming the insufficient exciton dissociation. To the ends, we rationally design the ferroelectric two-dimensional (2D) perovskite based on pyridine heterocyclic ring as the organic interlayer. We uncover that incorporation of the ferroelectric 2D material into 3D perovskite induces an increased builtin electric field (BEF), which enhances the exciton dissociation efficiency in the device. Moreover, the 2D seeds could assist the 3D crystallization by forming more homogeneous and highly-oriented perovskite crystals. As a result, an impressive power conversion efficiency (PCE) over 23 % has been achieved by the f-PSCs with outstanding ambient stability. Moreover, the piezo/ ferroelectric 2D perovskite intrigues a decreased hole transport barriers at the ITO/perovskite interface under tensile stress, which opens new possibilities for developing highly-efficient f-PSCs.

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“…It was suggested that the addition of 2D perovskite promoted a preferred (110) orientation of the 3D perovskite with better crystallinity. [37] In addition, the 3D perovskite Angewandte Chemie film showed a noticeable peak at 12.7°corresponding to the residual PbI 2 crystals, which was vanished in the 2D/3D hybrid film. This was consistent with film morphological features shown by the scanning electron microscope (SEM) images in Figure 3b and c, where the white areas in 3D film presented unreacted PbI 2 .…”

Section: Resultsmentioning

confidence: 99%

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

Han

¹

,

Wang

²

,

Liu

³

et al. 2023

View full text Add to dashboard Cite

Despite the great progress of flexible perovskite solar cells (f-PSCs), it still faces several challenges during the homogeneous fabrication of high-quality perovskite thin films, and overcoming the insufficient exciton dissociation. To the ends, we rationally design the ferroelectric two-dimensional (2D) perovskite based on pyridine heterocyclic ring as the organic interlayer. We uncover that incorporation of the ferroelectric 2D material into 3D perovskite induces an increased builtin electric field (BEF), which enhances the exciton dissociation efficiency in the device. Moreover, the 2D seeds could assist the 3D crystallization by forming more homogeneous and highly-oriented perovskite crystals. As a result, an impressive power conversion efficiency (PCE) over 23 % has been achieved by the f-PSCs with outstanding ambient stability. Moreover, the piezo/ ferroelectric 2D perovskite intrigues a decreased hole transport barriers at the ITO/perovskite interface under tensile stress, which opens new possibilities for developing highly-efficient f-PSCs.

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“…Visible-infrared radiance of 0.012 W·Sr −1 ·m −2 at 6 V was measured in electroluminescent devices with Cs 3 Sb 2 I 9 as the emitter layer [ 12 ]. Ummi Kalsom Noor Din et al also synthesized lead-free, fully inorganic single crystal perovskite Cs 3 Sb 2 Br 9 with a photoluminescence quantum yield of 23% using an inverse temperature crystallization method [ 13 ]. These excellent works have confirmed that lead-free perovskites have a promising future in the photovoltaic and photoelectronic fields.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structures and Photoelectric Properties in Cs3Sb2X9 (X = Cl, Br, or I) under High Pressure: A First Principles Study

Wu

¹

,

Xiang

²

,

Zhang

³

et al. 2022

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Lead-free perovskites of Cs3Sb2X9 (X = Cl, Br, or I) have attracted wide attention owing to their low toxicity. High pressure is an effective and reversible method to tune bandgap without changing the chemical composition. Here, the structural and photoelectric properties of Cs3Sb2X9 under high pressure were theoretically studied by using the density functional theory. The results showed that the ideal bandgap for Cs3Sb2X9 can be achieved by applying high pressure. Moreover, it was found that the change of the bandgap is caused by the shrinkage of the Sb-X long bond in the [Sb2X9]3− polyhedra. Partial density of states indicated that Sb-5s and X-p orbitals contribute to the top of the valence band, while Sb-5p and X-p orbitals dominate the bottom of the conduction band. Moreover, the band structure and density of states showed significant metallicity at 38.75, 24.05 GPa for Cs3Sb2Br9 and Cs3Sb2I9, respectively. Moreover, the absorption spectra showed the absorption edge redshifted, and the absorption coefficient of the Cs3Sb2X9 increased under high pressure. According to our calculated results, the narrow bandgap and enhanced absorption ability under high pressure provide a new idea for the design of the photovoltaic and photoelectric devices.

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Effect of temperature on the formation of highly crystalline lead-free perovskite Cs3Sb2Br9 hexagonal microdisks

Cited by 8 publications

References 25 publications

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

Rational Design of Ferroelectric 2D Perovskite for Improving the Efficiency of Flexible Perovskite Solar Cells Over 23 %

Electronic Structures and Photoelectric Properties in Cs3Sb2X9 (X = Cl, Br, or I) under High Pressure: A First Principles Study

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