Formation of Mn doped CH3NH3PbBr3perovskite microrods and their collective EMP lasing

Zou, Shuangyang; Gong, Zizheng; Liang, Bianbian; Hou, Li‐Peng; Liu, Ruibin; Zhong, Haizheng; Zou, B. S.; Kavokin, Alexey

doi:10.1088/2399-6528/aa9c4f

Cited by 15 publications

(14 citation statements)

References 29 publications

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“…2D NPLs, which are highly quantum confined in the z direction, could not afford the ferromagnetism of Mn ions to exist in nanometer size. 32,33 In the present investigation, the aforementioned effect is ruled out, and there is another reason that may be held responsible for the increased lifetime in the Mn-doped CsPbBr 3 NPLs.…”

mentioning

confidence: 70%

“…Therefore, it can be clearly concluded that the EMP formation occurs in bulk materials. 32,33 In addition, the excited state of 4 T 1 in Mn 2+ resides within the CsPbBr 3 NPL band gap; immediately after excitation of the Mn-doped CsPbBr 3 NPLs, rapid energy transfer from the host to Mn 2+ takes place within 1 ps, and there is not sufficient time for EMP formation (100 ps). 2D NPLs, which are highly quantum confined in the z direction, could not afford the ferromagnetism of Mn ions to exist in nanometer size.…”

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confidence: 99%

“…(i) Formation of an excitonic magnetic polaron (EMP) , in the Mn-doped CsPbBr 3 NPLs. The concurrent coupling of excitons, longitudinal optical phonons (LO), and local coupled spins is responsible for the EMP formation in the diluted magnetic semiconductor (DMS) nanomaterials, which creates the individual EMP emission band.…”

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confidence: 99%

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Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture

Babu

Kaur

Shukla

et al. 2020

J. Phys. Chem. Lett.

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Mn-doped perovskites have already been widely explored in the context of interesting optical, electronic, and magnetic properties. Such fascinating traits showcased by them explain the huge augmentation in the device efficiency, directing their widespread application in the field of solar cells, energyharvesting sectors, and light-emitting diodes. However, the underlying photophysics governing the overall charge carrier dynamics in Mn-doped CsPbBr 3 nanoplatelets (NPLs) has never been discussed and therefore demands an in-depth investigation. Herein, fluorescence up-conversion and femtosecond transient absorption (TA) spectroscopy are employed for gaining a comprehensive understanding of the excited-state dynamics and the fundamental energy/charge-transfer processes for twodimensional CsPbBr 3 nanoplatelets (NPLs) and their Mn-doped counterparts. The up-conversion measurement clearly suggests the possibility of energy-transfer pathways in the Mn-doped CsPbBr 3 NPLs. Interestingly, strong indication of charge transfer (CT) in Mn-doped CsPbBr 3 NPLs was unambiguously established by an ultrafast TA approach. Our investigation clearly suggests that both the probable processes viz. the ultrafast energy and electron transfers noticeable in the Mn 2+ -doped CsPbBr 3 NPLs are utterly competitive and rapid owing to the highly confined nature of the two-dimensional NPLs. This extensive probing of concurrent charge/energy-transfer processes may pave help clarify unresolved anomalies in Mn-doped perovskites, which may prove advantageous for a wide range of practical applicability.

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confidence: 70%

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confidence: 99%

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Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture

Babu

Kaur

Shukla

et al. 2020

J. Phys. Chem. Lett.

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“…Previously, microrod and nanorods of CH 3 NH 3 PbBr 3 and CH 3 NH 3 PbI 3 structures were also reported (Table S1). − To gain more mechanistic insight into the conversion from FAPbX 3 to MAPbX 3 , we have done the solid-state magic angle spinning (MAS) 1 H NMR of all the compounds (Figure c,f). The characteristic CH (8.06–8.10 ppm) and NH 2 (8.76–9.04 ppm) broad peaks , of FA + are observed in FAPbX 3 , but those peaks disappear in MAPbX 3 , and the CH 3 (4.15–4.22 ppm) and NH 3 (6.67–6.88 ppm) broad peaks of MA + appear at different positions.…”

Section: Resultsmentioning

confidence: 99%

Effect of Organic–Cation Exchange Reaction of Perovskites in Water: H-Bond Assisted Self-Assembly, Black Phase Stabilization, and Single-Particle Imaging

Jana

Kim

2019

ACS Appl. Energy Mater.

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Despite outstanding performance of organic–inorganic lead halide perovskite (OILHP)-based solar cells and light-emitting devices, they are still unusable for practical applications due to instability of OILHP in humid conditions. The extreme moisture sensitivity of these materials restricts all kinds of study in water media such as organic–cation exchange reaction, H-bonding assisted self-assembly, and phase stabilization in water. In order to address this issue, we report the full mechanistic details of nontemplate aqueous-phase synthesis and band-gap engineering of formamidinium (FA) lead halide (FAPbX3; X = Cl/Br/I) as well as its conversion to fluorescent MAPbX3 (MA = methylammonium) in water. Our study is the first example of an organic cation exchange reaction of hybrid perovskites family in water. By this aqueous ion-exchange synthetic approach, the yellow phase of FAPbI3 converts into black phase of MAPbI3 and a unique tube-structure of MAPbBr3–x I x self-assembles through hydrogen bonding, which is a well-known factor for degradation of OILHPs. The as-synthesized tube-shaped perovskites monitored at the single-particle level exhibit shape-correlated fluorescence images. Our mechanistic synthetic details for ion-exchange reaction in water open an exciting path for synthesizing mixed organic cation perovskites in water for diverse applications such as solar-cells, light-emitting devices, and single-particle imaging/tracking.

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“…Furthermore, exciton-polariton condensates allowed for the to observation of some fascinating phenomena from superfluid excitations [20][21][22][23][24][25][26] , to solitons [27][28][29] . Several possible applications have been put forward as well, ranging from low threshold lasers 30,31 , to all-optical transistors [32][33][34] , to quantum simulation 35,36 .…”

Section: Introductionmentioning

confidence: 99%

Spontaneous formation of spin lattices in semimagnetic exciton-polariton condensates

Miętki

Matuszewski

2018

Phys. Rev. B

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An exciton-polariton microcavity that incorporates magnetic ions can exhibit a spontaneous selftrapping phenomenon which is an analog of the classical polaron effect. We investigate in detail the full model of a polariton condensate that includes pumping and losses, the spin degree of freedom, external magnetic field and energy relaxation. In the quasi-one-dimensional case, we show that the polaron effect can give rise to a spontaneous lattice of perfectly arranged polarization domains in an antiferromagnetic configuration. We find that partial polarization of the condensate at moderate magnetic field strengths facilitates the formation of such "polaron lattices", which are qualitatively different from self-trapped polarons that appear in a fully polarized condensate. Within the Bogoliubov-de Gennes approximation, we calculate the instability condition which marks the appearance of the patterns. Surprisingly, we find that the stability condition displays a discontinuity at the point of partial-full polarization threshold.

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Formation of Mn doped CH₃NH₃PbBr₃perovskite microrods and their collective EMP lasing

Cited by 15 publications

References 29 publications

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture

Effect of Organic–Cation Exchange Reaction of Perovskites in Water: H-Bond Assisted Self-Assembly, Black Phase Stabilization, and Single-Particle Imaging

Spontaneous formation of spin lattices in semimagnetic exciton-polariton condensates

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Formation of Mn doped CH3NH3PbBr3perovskite microrods and their collective EMP lasing

Cited by 15 publications

References 29 publications

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr3 Perovskite Nanoplatelet Architecture

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr3 Perovskite Nanoplatelet Architecture

Effect of Organic–Cation Exchange Reaction of Perovskites in Water: H-Bond Assisted Self-Assembly, Black Phase Stabilization, and Single-Particle Imaging

Spontaneous formation of spin lattices in semimagnetic exciton-polariton condensates

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Formation of Mn doped CH₃NH₃PbBr₃perovskite microrods and their collective EMP lasing

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture

Concurrent Energy- and Electron-Transfer Dynamics in Photoexcited Mn-Doped CsPbBr₃ Perovskite Nanoplatelet Architecture