Synthesis, Ambient storage stability and optoelectronic properties of Mn-doped CsPbBr3 perovskite crystals

Bhardwaj, Aditya; Kushwaha, Ajay

doi:10.1007/s00339-022-06006-w

Cited by 3 publications

(2 citation statements)

References 64 publications

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“…Several Raman signals at 72, 187, and 277 cm −1 are discerned (Figure S4, Supporting Information), which are assigned to vibration of [PbBr 6 ] 4− octahedron, [PbCl 6 ] 4− octahedron, and torsional vibration of Cs + coupling to [PbBr 6 ] 4− and [PbCl 6 ] 4− octahedrons, respectively. [29][30][31][32][33] All these results verify that CsPb(Cl/Br) 3 PeQDs can be generated in glass after fs laser irradiation.…”

Section: Resultssupporting

confidence: 61%

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Xiao,

Lin,

Chen

et al. 2023

Laser & Photonics Reviews

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The complex and high‐precision patterning of perovskite quantum dots (PeQDs) is of vital importance for exploring their new functionalities and device applications. In this work, a strategy based on the combination femtosecond (fs) laser‐irradiation and humidity‐control is reported to construct patterns of cyan CsPb(Cl/Br)3 PeQDs in a transparent glass medium. Benefiting from their ionic crystal feature and low formation energy, CsPb(Cl/Br)3 PeQDs can be locally crystallized and decomposed via fs laser irradiation without further heat‐treatment. More notably, it is found that a water molecule is able to affect the growth of CsPb(Cl/Br)3 PeQDs in glass. By modulation of relative humidity in air, the selectively decomposed perovskite structure is spontaneously regenerated, and the highly emissive CsPb(Cl/Br)3 PeQDs can be in situ manufactured in the confined glass region. This allows for reversible luminescence from the same patterns of laser printing‐erasing‐recovering, and the process can be repeated for multiple cycles without destruction of optical performance and robustness. The results provide a flexible method to develop new encryption/decryption technology for information security and anti‐counterfeiting.

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Section: Resultssupporting

confidence: 61%

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Xiao,

Lin,

Chen

et al. 2023

Laser & Photonics Reviews

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show abstract

“…This is confirmed by the increased lattice spacing (Figure S3) and the red-shift of Raman peak positions (Figure S4). 43 Furthermore, the successful doping of iodide ions in the CsPbBr 3 QDs is confirmed by the composition-dependent PL spectra (Figure S5a), the red-shift of the absorption edges in the UV−vis absorption spectra (Figure S5b), and the variation of the band gap (Figure S5c). This observation is consistent with conclusions reported in the literature on mixed halide perovskites.…”

Section: ■ Results and Discussionmentioning

confidence: 73%

Improvement in Stability and Storage Performance of All-Inorganic Perovskite CsPb(Br_1–xI_x)₃ Memristors Based on Simple Halide Ion Migration

Li,

Wang,

Peng

et al. 2024

ACS Appl. Electron. Mater.

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The facile ionic transport in all-inorganic CsPbX3 is crucial for the switching behavior and reliability of ion migration-based memristors. This work presents a method of halide ion doping to reduce the bromine vacancies on the surface of CsPbBr3 quantum dots (QDs) and enhance the migration barriers of bromine ions. This improves the performance of memristors and achieves a more stable resistive switching process. The switching voltages (V SET/V RESET) for the CsPb(Br0.93I0.07)3 QD-based device are 0.92 V/–3.01 V. The V SET/V RESET dispersion range has narrowed from ±0.12 V/±0.16 V for the CsPbBr3 QD-based device to a more consistent ±0.07 V/±0.11 V, resulting in a notable improvement in switching voltage uniformity. The stability of the device over 100 cycles has been optimized, and the HRS resistance varies from 550 × (100 ± 17%) Ω to 69550 × (100 ± 4.1%) Ω, with the ON/OFF ratio increasing significantly to 103. Consequently, this approach can effectively modulate memristive behaviors, indirectly suppressing the random generation of conductive channels. This is enlightening in constructing memristors with high stability and storage capacity.

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Optical and photoelectrical properties of low-concentration-Mn-doped CsPbBr₃ nanocrystals

Bhardwaj

Kushwaha

2023

Nanomaterials and Energy

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Doping of Cesium Lead Bromide (CsPbBr3) perovskite nanocrystals offers the effective control on the optical and optoelectrical properties leading to possibilities for several new applications. Herein, CsPbBr3 perovskite nanocrystals are synthesised with low concentration of Manganese (Mn) doping into perovskite lattice using Manganese chloride (MnCl2) precursor. A shift in x-ray diffraction peaks towards higher angles indicates that Mn as a dopant is present inside CsPbBr3 lattice. The change in the MnCl2 precursor concentration from 5 to 10 mmol, results an increment in the atomic percentage (At.%) of Mn from 0.3 to 0.5% into the CsPbBr3 crystal. Low concentration of Mn doping (0.3 At.%) in CsPbBr3 results in enhancement of green emission, while higher Mn doping (0.5 At.%) results in blue emission. The band gap of CsPbBr3 nanocrystals increases from 2.31 eV to 2.53 eV with increase in the concentration of manganese. The dark and photoelectrical conductivity of CsPbBr3 nanocrystals is improved in case of low concentration (0.3 At.%) of Mn doping. The ratio of photocurrent vs. dark current is found to be ∼182 in Mn doped CsPbBr3 crystals film as compared to ∼101 for undoped CsPbBr3 crystals film. The low concentration of Mn doping improves the overall electrical and photoelectrical conductivity of CsPbBr3 perovskite nanocrystals.

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Synthesis, Ambient storage stability and optoelectronic properties of Mn-doped CsPbBr3 perovskite crystals

Cited by 3 publications

References 64 publications

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Improvement in Stability and Storage Performance of All-Inorganic Perovskite CsPb(Br_1–xI_x)₃ Memristors Based on Simple Halide Ion Migration

Optical and photoelectrical properties of low-concentration-Mn-doped CsPbBr₃ nanocrystals

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Synthesis, Ambient storage stability and optoelectronic properties of Mn-doped CsPbBr3 perovskite crystals

Cited by 3 publications

References 64 publications

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Humidity‐Induced Reversible Crystallization of Laser‐Printing Perovskite Quantum Dots in Glass

Improvement in Stability and Storage Performance of All-Inorganic Perovskite CsPb(Br1–xIx)3 Memristors Based on Simple Halide Ion Migration

Optical and photoelectrical properties of low-concentration-Mn-doped CsPbBr3 nanocrystals

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Product

Resources

About

Improvement in Stability and Storage Performance of All-Inorganic Perovskite CsPb(Br_1–xI_x)₃ Memristors Based on Simple Halide Ion Migration

Optical and photoelectrical properties of low-concentration-Mn-doped CsPbBr₃ nanocrystals