Hybrid Iodide Perovskites of Divalent Alkaline Earth and Lanthanide Elements

Kent, Greggory T.; Zhuang, Jiale; Albanese, Kaitlin R.; Zohar, Arava; Morgan, Emily; Kallistova, Anna; Kautzsch, Linus; Mikhailovsky, Alexander A.; Vishnoi, Pratap; Seshadri, Ram; Cheetham, Anthony K.

doi:10.1021/jacs.3c11494

Cited by 6 publications

(1 citation statement)

References 68 publications

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“…38 Inspired by this synthetic approach, we have recently succeeded in making five new hybrid perovskite iodides of the general formula AM II I 3 (A = methylammonium with M II = Sr, Sm, Eu, and A = formamidinium with M II = Sr, Eu). 39 Their structures were obtained from X-ray powder diffraction data by Rietveld refinement and their calorimetric, optical, photoluminescence, and magnetic properties were also reported.…”

Section: New Hybrid Single Perovskite Iodidesmentioning

confidence: 99%

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

Cheetham,

Bristowe,

Tominaka

et al. 2024

Mater. Horiz.

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Section: New Hybrid Single Perovskite Iodidesmentioning

confidence: 99%

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

Cheetham,

Bristowe,

Tominaka

et al. 2024

Mater. Horiz.

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Near‐Complete Suppression of NIR‐II Luminescence Quenching in Halide Double Perovskites for Surface Functionalization Through Facet Engineering

Duan,

Xu,

Zha

et al. 2024

Advanced Science

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Lanthanide‐based NIR‐II‐emitting materials (1000–1700 nm) show promise for optoelectronic devices, phototherapy, and bioimaging. However, one major bottleneck to prevent their widespread use lies in low quantum efficiencies, which are significantly constrained by various quenching effects. Here, a highly oriented (222) facet is achieved via facet engineering for Cs2NaErCl6 double perovskites, enabling near‐complete suppression of NIR‐II luminescence quenching. The optimally (222)‐oriented Cs2Ag0.10Na0.90ErCl6 microcrystals emit Er3+ 1540 nm light with unprecedented high quantum efficiencies of 90 ± 6% under 379 nm UV excitation (ultralarge Stokes shift >1000 nm), and a record near‐unity quantum yield of 98.6% is also obtained for (222)‐based Cs2NaYb0.40Er0.60Cl6 microcrystallites under 980 nm excitation. With combined experimental and theoretical studies, the underlying mechanism of facet‐dependent Er3+ 1540 nm emissions is revealed, which can contribute to surface asymmetry‐induced breakdown of parity‐forbidden transition and suppression of undesired non‐radiative processes. Further, the role of surface quenching is reexamined by molecular dynamics based on two facets, highlighting the drastic two‐phonon coupling effect of a hydroxyl group to 4I13/2 level of Er3+. Surface‐functionalized facets will provide new insights for tunable luminescence in double perovskites, and open up a new avenue for developing highly efficient NIR‐II emitters toward broad applications.

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Investigation of the Effect of the Passivation on the Charge Transfer from MAPbI₃ to Electron Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique

Jeong,

Choi,

Kim

et al. 2024

ChemPhysChem

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We fabricated MAPbI3 perovskite thin films with ZnO on a glass substrate, in which a passivation layer (Phenethylammonium iodide (PEAI); p‐methoxyphenethylammonium iodide (CH3O‐PEAI); 2‐methoxyethylammonium iodide (MEAI)) was inserted between two layers. In order to understand the effect of the insertion of each passivation material on the transfer efficiency of the photo‐generated electrons from MAPbI3 to ZnO, we observed the near‐field heterodyne transient grating (NF‐HD‐TG) responses of each film and investigated the component arising from the recombination of the trapped electrons at the ZnO surface. Based on the accelerated recombination between photo‐generated holes remaining in the MAPbI3 layer and surface‐trapped electrons in ZnO and the increase in the number of the trapped electrons in ZnO when either CH3O‐PEAI or PEAI was applied, we successfully revealed that the charge transfer efficiency was enhanced by the insertion of the passivation materials including a benzene ring stabilizing the defect states. Particularly, it was demonstrated that CH3O‐PEAI showed the highest increase in the charge transfer efficiency, which could be attributed to the high electron density in the benzene ring, resulting from the existence of the electron donating group, CH3O, and its role in the effective transition from 3D to 2D perovskite phases.

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Hybrid Iodide Perovskites of Divalent Alkaline Earth and Lanthanide Elements

Cited by 6 publications

References 68 publications

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

Near‐Complete Suppression of NIR‐II Luminescence Quenching in Halide Double Perovskites for Surface Functionalization Through Facet Engineering

Investigation of the Effect of the Passivation on the Charge Transfer from MAPbI₃ to Electron Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique

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Hybrid Iodide Perovskites of Divalent Alkaline Earth and Lanthanide Elements

Cited by 6 publications

References 68 publications

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)2KBiCl6 (MA = methylammonium)’

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)2KBiCl6 (MA = methylammonium)’

Near‐Complete Suppression of NIR‐II Luminescence Quenching in Halide Double Perovskites for Surface Functionalization Through Facet Engineering

Investigation of the Effect of the Passivation on the Charge Transfer from MAPbI3 to Electron Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique

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A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

A reflection on ‘The synthesis, structure and electronic properties of a lead-free hybrid inorganic–organic double perovskite (MA)₂KBiCl₆ (MA = methylammonium)’

Investigation of the Effect of the Passivation on the Charge Transfer from MAPbI₃ to Electron Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique