Photo‐Induced Synthesis of Ytterbium and Manganese‐Doped CsPbCl3 Nanocrystals for Visible to Near‐Infrared Photoluminescence with Negative Thermal Quenching DOI Creative Commons
Xiaochen Fang, Zhuo Chen, Mandy H. M. Leung

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Rare‐earth‐doped all‐inorganic perovskite applications for near‐infrared (NIR) emission are crucial the construction of next generation intelligent lighting sources. However, preparation rare‐earth‐doped is complex, and difficult to control, issue thermal quenching poses significant challenges its practical application. Here, in order address these issues, a convenient photo‐induced synthesis method CsPbCl 3 :Mn/Yb nanocrystals (NCs) proposed by decomposing carbon tetrachloride with 365 nm light provide chloride ions regulate formation at room temperature. The negative NIR achieved through energy transfer between Mn Yb. intensity Yb enhances 3.2 times when temperature rises ≈427 K. Furthermore, help orange from 2+ 3+ ions, visible emitting diode (LED) devices constructed applied illumination night vision imaging. This study enriches methods chemical research on doping, which may open up new opportunities widespread application perovskite‐based materials or device engineering.

Language: Английский

Scintillation Performance of Mn(II)‐Doped Cs2NaBiCl6 Double Perovskite Nanocrystals for X‐Ray Imaging Applications DOI
V. Naresh, R. Ramaraghavulu, Kiran Gupta

et al.

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 12(9)

Published: Dec. 18, 2023

Abstract Lead‐free halide perovskite‐based X‐ray scintillators with high light yield (LY) and low detection limit (LOD) have become a growing subject of research interest due to their promising application in wide range areas, from security healthcare. Herein, modified hot injection method is employed synthesize Mn(II)‐doped Cs 2 NaBiCl 6 double perovskite nanocrystals (DPNCs) examine scintillating properties for imaging detection. The DPNCs exhibit broad orange photoluminescence (PL) band at 586 nm PL quantum 10.6%, attributed the 4 T 2g (4G) → A 1g (6S) transition Mn 2+ . Temperature‐dependent time‐resolved spectra 4.04% demonstrate that emission intensity initially reaches maximum subsequently decreases, while decay lifetimes monotonically decrease increasing temperature. This inconsistency can be effect [MnCl ] 4− octahedra electron‐phonon coupling elevated temperatures. Further, 0.05 mm thick :4.04%Mn@poly(methyl methacrylate) scintillator film synthesized an LY 28,350 photons MeV −1 LOD 45.2 nGy air s Additionally, this demonstrates good performance spatial resolution 14.76 line pairs (lp) shows exceptional stability under prolonged exposure.

Language: Английский

Citations

15
Mn2+ and Sb3+ Codoped Cs2ZnCl4 Metal Halide with Excitation-Wavelength-Dependent Emission for Fluorescence Anticounterfeiting DOI

Tiancheng Zheng,

Huanxin Yang, Yuling Liu

et al.

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(42), P. 17352 - 17361

Published: Oct. 7, 2023

In recent years, there has been a growing demand for luminescence anticounterfeiting materials that possess the properties of environmentally friendly, single-component, and multimode fluorescence. Among explored, low dimensional metal halides have gained wide attention because unique characteristics including toxicity, simple synthesis, good stability, so on. Here, we synthesized Mn2+ Sb3+ codoped Cs2ZnCl4 single crystals by facile hydrothermal method. Under 365 nm excitation, compound exhibits dual-band emissions at 530 730 nm. However, under 316 only shows one emission band from 500 to 850 peaking nm, while 460 650 with an peak can be observed. Based on study photoluminescence mechanism, green red originate located in tetrahedron self-trapped exciton [SbCl4]- clusters, respectively. Due zero-dimensional structure host, is minimal energy transfer between these dopants. Consequently, luminous ratios two independently regulated. Except tuning dopant concentrations, Cs2ZnCl4:Mn2+, demonstrates excitation-wavelength-dependent properties, which could emit more than colors change excitation wavelength. As result, based designed, aligns requirements fluorescence properties.

Language: Английский

Citations

13
Synergistically enhanced water-resistive perovskite nanocrystals for cell nucleus imaging and acid phosphatase detection DOI
Wanxin Zhuang, Dong Yao, Mingling Li

et al.

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 416, P. 136014 - 136014

Published: May 22, 2024

Language: Английский

Citations

4
Interplay between photoinduced charge and energy transfer in manganese doped perovskite quantum dots DOI
Aradhana Panigrahi, Leepsa Mishra, Priyanka Dubey

et al.

The Journal of Chemical Physics, Journal Year: 2024, Volume and Issue: 160(24)

Published: June 24, 2024

A comprehensive study on the photo-excited relaxation dynamics in semiconducting perovskite quantum dots (PQDs) is pivotal realizing their extensive potential for optoelectronics applications. Among different competing photoinduced kinetics, energy transfer and charge (CT) PQDs need special attention, as they often influence device efficacy, particularly with donor–acceptor hybrid architecture. In this work, we explore a detailed investigation into CT mixed halide undoped CsPb(Br/Cl)3 Mn2+ doped quinone molecule, p-benzoquinone (BQ). The level alignment of BQ allows an efficient CT, whereas doping reduces efficiency, experiencing competition between from host to dopant BQ. conductive atomic force microscopy measurements unveil direct correlation spectroscopic studies by showing significant improvement conductance presence BQ, while inappreciable change observed PQDs. much-reduced transition voltage barrier height further validate faster PQD than one. Furthermore, enhance stability, better air thermal stability compared counterparts. These results reveal that strategy can regulate these increase which will be beneficial development desired optoelectronic devices long-term stability.

Language: Английский

Citations

4
Origin of Dopant-Carrier Exchange Coupling and Excitonic Zeeman Splitting in Mn2+-Doped Lead Halide Perovskite Nanocrystals DOI

I-Hsuan Yeh,

Mahdieh Ghobadifard, Feng Lin

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(34), P. 10554 - 10561

Published: Aug. 16, 2024

Low-dimensional metal halide perovskites have unique optical and electrical properties that render them attractive for the design of diluted magnetic semiconductors. However, nature dopant-exciton exchange interactions result in spin-polarization host-lattice charge carriers as a basis spintronics remains unexplored. Here, we investigate Mn

Language: Английский

Citations

4
Ultrasound-assisted Zn-doped CsPbCl3 perovskite nanocrystals through Mn co-doping approach with bright luminescence and stability DOI
Fang Lan,

Dengfeng Luo,

Jing Zhang

et al.

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116823 - 116823

Published: Feb. 1, 2025

Language: Английский

Citations

0
(Full-color and time-valve controllable luminescence of CsPbX3 nanocrystals via quasi-solid-state ion exchange for multilevel 3D anti-counterfeiting DOI

Yueling Lai,

K. Gong,

Hauyu Baobab Liu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 514, P. 163360 - 163360

Published: May 5, 2025

Citations

0
Dual-emission Mn-doped CsPbCl3 QDs in collaboration with CsPbBr3 QDs applied in excitation-sensitive flexible anti-counterfeiting technologies DOI
Zhen Yang,

Changqing Lin,

Maolin Liu

et al.

Journal of Solid State Chemistry, Journal Year: 2024, Volume and Issue: 332, P. 124584 - 124584

Published: Feb. 5, 2024

Language: Английский

Citations

3
In Situ Synthesis of Br‐Rich CsPbBr3 Nanoplatelets: Enhanced Stability and High PLQY for Wide Color Gamut Displays DOI
V. Naresh, John Leo Velpugonda, Nohyun Lee

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 25, 2024

Abstract This study presents the Br‐rich in situ synthesis of blue‐emitting 2D CsPbBr 3 nanoplatelets (NPLs) with various Br/Pb ratios using ZnBr 2 as a Br precursor to enhance ion adsorption significantly. leads effective passivation surface defects, particularly Pb−Br bonds, by increasing positive charge density around Pb atoms, thus creating stable bonding environment and reducing defect formation. Consequently, photoluminescence quantum yield (PLQY) improves from 31.15% for ratio 87.2% 6. NPLs 6 also exhibit longer lifetimes (16.69 ns) slower bleach recovery dynamics, indicating fewer non‐radiative recombination pathways exciton dynamics. Additionally, demonstrated better thermal stability, an activation energy 124.3 meV, stronger binding. These exhibited enhanced UV tolerance at 43.9% water resistance 23.8%, making them suitable displays lighting. Furthermore, Br‐passivated are used blue emitters prototype white LEDs, achieving wide color gamut, 126.6% National Television Standards Committee 94.5% Rec. 2020, demonstrating their potential high‐quality lighting advanced display technologies.

Language: Английский

Citations

3
High-throughput preparation of Mn2+-doped CsPbCl3 nanocrystals via a fluidic channel reaction DOI
Jingshan Hou, Qing Zhang,

Runze Guo

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(11), P. 4085 - 4092

Published: Jan. 1, 2024

Yellowish-orange CsPbCl 3 :Mn 2+ nanocrystals with excellent water durability were developed through the high-throughput preparation method based on a fluidic channel reactor.

Language: Английский

Citations

2