Suppressing the Jahn‐Teller Effect in 0D Manganese‐Based Perovskite Derivatives for Transparent and Flexible Light‐Emitting Diodes DOI
Yangyang Cai, Siyu Yan, Xinran Du

et al.

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

Published: Dec. 26, 2024

Abstract The development of stable and deformation‐free crystal structures perovskites their derivatives are crucial for electroluminescent devices. In this article, a novel transparent manganese‐based perovskite derivative K 4 MnBr 1.33 Cl 4.67 is synthesized with mixed halogens. For the unique octahedral structure, Jahn‐Teller distortion, typically present in such structures, completely suppressed, resulting high environmental stability luminescence spectrum. flexible devices, peak current density, average external quantum efficiency on each side maximum brightness 45 mA cm −2 , 4.9%, 2800 cd m respectively. best half‐life LED reaches 10 h starting luminance 100 . As first lead‐free LED, it features an outstanding transparency 76% excellent flexibility intensity maintenance 90% after 2000 bending cycles. This work shows that manganese can provide promising way to fabricate high‐performance LEDs.

Language: Английский

Temperature-Dependent Photoluminescence from Well-Resolved Excited State Structures in Rare-Earth-Based Double Perovskites DOI
Haowen Hou, Shuai Zhang, Haiyan Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(24), P. 31332 - 31340

Published: June 4, 2024

Lead-free halide double perovskites (DPs) have become a research hotspot in the field of photoelectrons due to their unique optical properties and flexible compositional tuning. However, reports on DPs primarily concentrate room temperature state only exhibit single emission band. Here, we synthesized Cs2NaYCl6:Sb3+, Dy3+ by solvothermal method realize white light with photoluminescence (PL) quantum yield as high 70.7%. The energy-transfer process from self-trapped excitons (STEs) ions was revealed characterization theoretical simulation calculations. Interestingly, observed double-emission low-energy STE Sb3+ at low temperatures, is consistent asymmetric doublet feature 3P1 → 1S0 transition split into two minima. PL spectra further showed that fluorescence intensity ratios 580 680 nm were strongly temperature-dependent, relative sensitivity up 1.79% K–1 360 K. Moreover, near-infrared radiation luminescence indicated also good prospects for night vision detection, well great potential applications solid-state illumination measurement.

Language: Английский

Citations

13
Thermal Enhanced Energy Transfer and High Thermal Sensitivity of Sb3+ Doped Cs2KYbCl6 Rare Earth Double Perovskites DOI

Yanchao Wang,

Haowen Hou,

Bai Yunlong

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: June 9, 2024

Abstract Rare‐earth based double perovskites (DPs) have attracted much attention due to stable, efficient, and unique luminescence, wide applications in many optoelectronic fields. However, their weak near‐infrared (NIR) emission poor anti‐thermal quenching severely limit the further applications. Herein, Sb 3+ ‐doped Cs 2 KYbCl 6 DP with cyan self‐trapped exciton (STE) NIR is prepared by a solvothermal method, separate photoluminescence quantum yields from STE reached ≈26.1% 43.8%, respectively. More importantly, not only contributes absorption energy transfer but also helps establish an effective thermally enhanced channel through self‐trapping state, resulting superior resistance. The thermal sensitivity of luminescence intensity ratio (LIR) I 1010 nm / 505 ( PL) time‐resolved temperature sensor reach 21.4 13.6% K −1 , respectively, which are ahead most sensing materials. Furthermore, it found that material exhibited advanced multifunctional LED lighting, flexible luminescent thin film, imaging. This work provides in‐depth understanding on photophysical mechanisms rare‐earth materials references for designing high‐performance

Language: Английский

Citations

10
Temperature-dependent self-trapped models regulating energy transfer in rare earth double perovskites via 5s2 electron doping DOI

Chujun Tan,

Shuai Zhang, Haiyan Wang

et al.

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(12), P. 3607 - 3617

Published: Jan. 1, 2024

Sb 3+ /Sm co-doping can effectively modulate the luminescence by adjusting energy transfer in Cs 2 NaYCl 6 double perovskites. Two minima excited state of 3 P 1 enable self-trapped exciton emission at low temperatures.

Language: Английский

Citations

6
Excited State Regulated Emission in Hybrid Indium Halides via Crystal Structure Switch DOI

Fangping Lin,

Shuai Zhang, Bingsuo Zou

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(9), P. 4355 - 4363

Published: Feb. 21, 2024

Organic–inorganic metal halides have become one of the most promising materials in next generation optoelectronic applications due to their high charge carrier mobility and tunable band gaps. In this study, Sb:PA6InCl9 Sb:PA4NaInCl8 single crystals were prepared through evaporation crystallization, respectively. Due different degrees lattice distortions, highly efficient yellow emission at 610 nm green 545 achieved by regulation excited state, By introducing additional sodium ions post-treatment, we found that zero-dimensional could rapidly convert into a two-dimensional layered structure Sb:PA4NaInCl8, thus resulting novel green/yellow switch. This work guides structural performance control organic–inorganic hybrid In-based offers broad prospects for luminescent switching anticounterfeiting applications.

Language: Английский

Citations

4
Rb2AgBr3:Cu scintillators for high performance gamma and X-ray detection DOI
Qi Wu, Xunsheng Zhou,

Wanting Gui

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160815 - 160815

Published: Feb. 1, 2025

Language: Английский

Citations

0
Effect of Trivalent Metal Cations in Layered Double Perovskites on Highly Selective CO2 Photoreduction to CO DOI
Wei Chen, Yanyi Huang, Daofu Wu

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Trivalent metal cation engineering in vacancy-ordered layered double perovskites (LDP) is a useful strategy to tune photocatalytic activity. However, the regulatory mechanism of composition on performance still lacks in-depth understanding. This study explores LDP with formula Cs4CdX2Cl12 (X = Bi, Sb) for CO2 reduction. The catalytic fine-tuned by regulating M(III)-site ions. yields CO and CH4 from Cs4CdSb2Cl12 MCs were measured at 23.81 2.68 μmol g-1, resulting selectivity 89.9%. Cs4CdBi2Cl12 demonstrated higher yields, produced 90.77 2.53 achieving 97.2%. In addition, situ diffuse reflectance infrared Fourier transform spectra reveal that modulation ions M(III)-position can enhance activity MCs. Density functional theory (DFT) analysis suggests Bi displays lower energy barrier than Sb rate-determining step, thus facilitating effective reduction CO. These findings highlight influence selection structural properties performance.

Language: Английский

Citations

0
Scalable Open‐Air Synthesis of Mg2+‐Doped Lead‐Free Cs3Cu2Cl5 Nanocrystals for High‐Performance Green LEDs DOI
Yang Tang,

Qingyu Xie,

Xuanming Zhang

et al.

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

Published: April 25, 2025

Abstract Cs 3 Cu 2 Cl 5 nanocrystals (NCs) have emerged as promising optoelectronic materials owing to their efficient self‐trapped exciton (STE) emission. However, limited environmental stability has significantly constrained application in light‐emitting diodes (LEDs). In this work, a facile ambient‐air synthesis strategy is developed for Mg ⁺‐doped NCs that simultaneously addresses both and emission efficiency challenges. Remarkably, optimal ⁺ doping (20%) enhances the photoluminescence quantum yield (PLQY) from 28.69% 59.3%. Comprehensive theoretical investigations through density of states (DOS) calculations ab initio molecular dynamics (AIMD) simulations demonstrate induces bandgap narrowing enhanced radiative recombination while reinforcing crystal lattice stability. When integrated with UV LED chip, optimized enable fabrication high‐performance green LEDs exhibiting outstanding luminance (17 281 cd m − ) excellent color (CIE coordinates: 0.354, 0.518). This study provides not only practical synthetic approach stable copper halide but also valuable insights designing STE emitters applications.

Language: Английский

Citations

0
Light-induced synthesis of Highly stable CsPbCl3:Mn2+@mSiO2 nanocomposites for white Light-Emitting Diodes DOI
Xiaochen Fang, Biao Zheng,

Mengyu Ding

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 500, P. 157339 - 157339

Published: Nov. 1, 2024

Language: Английский

Citations

2
Lattice distortion dependent photoluminescence in two-dimensional hybrid manganese halides by regulating penetration depth of organic amine DOI

Yingyun Wang,

Shuai Zhang, Haowen Hou

et al.

Journal of Luminescence, Journal Year: 2024, Volume and Issue: 273, P. 120674 - 120674

Published: May 10, 2024

Language: Английский

Citations

1
Toward an Ideal Light Source for Indoor Photosynthesis: Broadband Red Emission in Zero-Dimensional Hafnium-Based Metal Halide (TPP)2HfCl6·4C2H3N:Sb3+ DOI
Xiangyan Yun, Yan‐Rong Zhu, Yu Wang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

With suitable electron-phonon coupling strength, a near-unity broadband photoluminescence quantum yield (PLQY) can be achieved in organic-inorganic hybrid metal halides (OIHMHs) via self-trapped exciton (STE) emission. However, it is still challenging to obtain high-quality red emission from OIHMHs with desirable wavelength and high chemical stability, which hinders their practical application high-performance displays, plant-growth lighting, biomedical imaging. Herein, series of hafnium-based zero-dimensional (TPP)

Language: Английский

Citations

1