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

Rigid CuInS2/ZnS Core/Shell Quantum Dots for High Performance Infrared Light-Emitting Diodes DOI
Zhenyang Liu,

Chaoqi Hao,

Yingying Sun

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(17), P. 5342 - 5350

Published: April 17, 2024

CuInS2 (CIS) quantum dots (QDs) represent an important class of colloidal materials with broad application potential, owing to their low toxicity and unique optical properties. Although coating a ZnS shell has been identified as crucial method enhance performance, the occurrence cation exchange historically resulted in unintended formation Cu–In–Zn–S alloyed QDs, causing detrimental blueshifts both absorption photoluminescence (PL) spectral profiles. In this study, we present facile one-pot synthetic strategy aimed at impeding process promoting growth on CIS core QDs. The suppression electron–phonon interaction Auger recombination by rigid results CIS/ZnS core/shell QDs that exhibit wide near-infrared (NIR) emission coverage remarkable PL yield 92.1%. This effect boosts fabrication high-performance, QD-based NIR light-emitting diodes best stability such so far.

Language: Английский

Citations

9
Microwave-assisted synthesis of highly photoluminescent core/shell CuInZnSe/ZnS quantum dots as photovoltaic absorbers DOI Creative Commons
Shubham Shishodia, H. Rinnert, Lavinia Balan

et al.

Nanoscale Advances, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A microwave-assisted synthesis of water-dispersible core/shell Cu–In–Zn–Se/ZnS QDs and their potential as absorbers for QDSSCs.

Language: Английский

Citations

1
Long-Wavelength Afterglow Emission with Nearly 100% Efficiency through Space-Confined Energy Transfer in Organic-Carbon Dot Hybrid DOI

Jinyang Zhu,

Chao Li, Yongsheng Zhu

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(42), P. 13307 - 13314

Published: Oct. 10, 2024

Long-wavelength afterglow emitters are crucial for optoelectronics and information security; however, it remains a challenge in achieving high luminescence efficiency due to the lack of effective modulation electronic coupling nonradiative transitions singlet/triplet excitons. Here, we demonstrate an organic-carbon-dot (CD) hybrid system that operates via space-confined energy transfer strategy obtain bright emission centered at 600 nm with near-unity efficiency. Photophysical characterization theoretical calculation confirm efficient can be assigned synergistic effect intermolecular from triplet excitons CDs singlets subluminophores intense restraint decay losses singlet/triplet-state rationally rigidification amination modification. By utilizing precursor engineering, yellow near-infrared 575 680 efficiencies 94.4% 45.9% has been obtained. Lastly, these highly emissive powders enable superior performance lighting security.

Language: Английский

Citations

8
Crystallographic Engineering to Develop Ultra‐Narrow‐Band Cyan‐Emitting UCr4C4‐Type Phosphor for Healthy LED Lighting and Display DOI

Yujia Wan,

Peipei Dang, Dongjie� Liu

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(11)

Published: June 18, 2024

Abstract Narrow‐band cyan‐emitting materials for white light‐emitting diode (wLED) application have shown great potential in increasing the maximum accessible display gamut and improving color rendering of full‐spectrum healthy lighting. However, discovery novel narrow‐band cyan emitters with excellent luminescence performances remains challenging. Here, an ultra‐narrow‐band Na 5 K 3 (Li SiO 4 ) 8 :Eu 2+ (N phosphor (λ em = 483 nm) full width at half (FWHM) only 18 nm is developed from some typical UCr C frameworks phosphors by slightly modifying crystal structure symmetry. Through controllable regulation ratio 6 2 to N , lattice sites forming shoulder peaks are further squeezed generate narrowest emission. Moreover, exhibits low photoluminescence thermal quenching (90%@150 °C) high internal quantum efficiency (IQE) 50%. The index wLED health lighting enhanced 92 94. Using this short‐wavelength emission instead a part blue chip can effectively prevent “blue hazard”. This work provides basic principles design phosphors, thus achieving their applications fields eye‐friendly display.

Language: Английский

Citations

7
Crystal Field-Engineered Cr3+-Doped Gd3(MgxGa5–2xGex)O12 Phosphors for Near-Infrared LEDs and X-ray Imaging Applications DOI

Tianlong Zeng,

Ping Liu, Guo‐Qiang Zeng

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(28), P. 12886 - 12893

Published: July 1, 2024

Inorganic materials doped with chromium (Cr) ions generate remarkable and adjustable broadband near-infrared (NIR) light, offering promising applications in the fields of imaging night vision technology. However, achieving high efficiency thermal stability these NIR phosphors poses a significant challenge for their practical application. Here, we employ crystal field engineering to modulate characteristics Cr3+-doped Gd3Ga5O12 (GGG). The Gd3MgxGa5–2xGexO12 (GMGG):7.5% Cr3+ (x = 0, 0.05, 0.15, 0.20, 0.40) emission are developed through cosubstitution Mg2+ Ge4+ Ga3+ sites. This strategy also effectively reduces strength around ions, which results enhancement photoluminescence (PL) full width at half-maximum (fwhm) from 97 165 nm, alongside red shift PL peak an intensity up 2.3 times. Notably, behaviors is improved. demonstrate potential biological tissue penetration vision, as well exceptional scintillation performance scintillator imaging. research paves new perspective on development high-performance technology light-emitting diodes (LEDs) X-ray applications.

Language: Английский

Citations

7
Optical Applications of CuInSe2 Colloidal Quantum Dots DOI Creative Commons
Song Chen,

Bingfeng Zu,

Liang Wu

et al.

ACS Omega, Journal Year: 2024, Volume and Issue: 9(43), P. 43288 - 43301

Published: Oct. 15, 2024

The distinctive chemical, physical, electrical, and optical properties of semiconductor quantum dots (QDs) make them a highly fascinating nanomaterial that has been extensively studied. CuInSe

Language: Английский

Citations

4
Activate Reconstruction from Sb3+/Ho3+ Synergistic Doping Nanofibers for Interactive Information Encryption and Customized Display DOI Open Access
Xiaolong Dong, Xin Zhao, Yuhang Zhang

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Driven by the escalating demand for cutting‐edge materials in interactive encryption and customized display, optimization of excitonic coupling mechanisms perovskite‐based luminescent systems has emerged as a pivotal focus advanced research. Inspired synergistic doping (SD), photoswitchable energy transfer channel is realized utilizing UV‐responsive Cs 2 NaInCl 6 : Sb 3+ ‐Ho (CNIC: Sb‐Ho) phosphor. Benefiting from self‐trapped exciton , visible blue luminescence Ho achieves excitation reconstruction through SD, with sensitization coefficient to CNIC reaching two orders magnitude. Notably, CNIC: Sb‐Ho quantum dot embedded into polyacrylonitrile (PAN) polymethyl methacrylate (PMMA) fibers, respectively, distinct color coordinate channels are created altering concentration fiber matrix, thereby enabling personalization customization desired colors enhanced precision. Furthermore, excellent read‐in performance under UV irradiation achieved screen‐printing microcrystal on nanofibers combining it ACSII code, which endows UV‐induced controllable shape programming behavior multidimensional information encryption. This work establishes an visual interaction framework effectively integrating perovskite fluorescence tunability nanofiber adaptive structures, thus opening new possibilities smart application next‐generation optical technology.

Language: Английский

Citations

0
Colloidal ZnInGaS Nanocrystals with Wide‐Band Gap for Ultraviolet Emitters DOI Open Access
Yue Qin,

Zhannan Peng,

Xuerong Song

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract Colloidal wide band gap semiconductor nanocrystals (NCs) are the potential ultraviolet range materials for light‐emitters and photodetectors. ZnInGaS NCs with gaps produced intermediate of multinary magic sized clusters. With surface etching shell design, ZnInGaS/ZnGaS/ZnS core/shell exhibit band‐edge fluorescence emission at 394 nm record photoluminescent quantum yield 18.3% in Cd‐free emitters. The can be tuned from 3.20 to 3.75 eV via changed size composition, showing adjusted 366 420 nm, which is widely tunable range. Finally, integrated into a graphene transistor, obtaining visible‐blind photodetector. This study underscores ZIGS UV highlights their broader applicability optoelectronic devices, demonstrating significant practical applications.

Language: Английский

Citations

0
Highly efficient Zn:CuInSe2/ZnS quantum dots for near-infrared optical wireless communications DOI
Lei Nie, Linqi Chen, Jingzhou Li

et al.

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

By adjusting the stoichiometric ratio of CISe core and doping with Zn 2+ , highly efficient PLQY, near-infrared environmentally friendly QDs have been successfully synthesized.

Language: Английский

Citations

0
Modulating luminescence of K3AlF6:Mn4+ NCs via charge compensation and localized surface plasmon resonance effect DOI
Chen Yang, Yanzhen Tan, Zheyi Li

et al.

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Language: Английский

Citations

0