Triexciton induced RGB emission of organic-inorganic zirconium halide perovskites DOI Creative Commons
Zhengtao Deng,

Chuying Wang,

W. J. Meng

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 7, 2023

Abstract Materials with two or more excitons that emit different fluorescence under excitation sources have great potential in optical applications, but luminous materials three-exciton emission characteristics been largely undeveloped. Here, we report a novel zero-dimensional (0D) organic-inorganic hybrid ((C 2 H 5 ) 4 N) ZrCl 6 perovskite multiple exciton properties. The zirconium-based exhibits red around 620 nm, green at 527 and blue 498 nm. emissions come from self-trapped (STEs) d-d transition of Zr(IV), respectively, which are caused by distortion the [ZrCl6] 2- octahedrons. is thermally activated delayed (TADF), similar to all-inorganic Cs . absolute photoluminescence quantum yield (PLQY) double 83% PLQY 27%. With combinations samples, achieve variety applications. First, two-color luminescent anti-counterfeiting device was prepared using powder. Secondly, powder, white light-emitting diode (WLED) color rendering index (CRI) 95 prepared. Finally, ((C2H5)4N)2ZrCl6 powder used information encryption. Our work provides set multiexciton-emitting expected expand basic research practical applications multiexciton materials.

Language: Английский

Lead‐Free Perovskites with Photochromism and Reversed Thermochromism for Repeatable Information Writing and Erasing DOI
Yuhang Sheng,

Qingfeng Gui,

Yi Zhang

et al.

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

Published: July 23, 2024

Abstract Recently, novel optical information writing strategies have been developed based on fluorescent change of halide perovskites generated by light induced structural transformation. However, to date, the repeatable and erasing patterns are still a major challenge. Herein, lead‐free Cs 3 InCl 6 :Sb 3+ perovskite with photochromism reversed thermochromism is for erasing. The original synthesized modified hot‐injection method exhibits green photoluminescence (PL), which caused recombination self‐trapped excitons. After treating ultrasonication heating, PL gradually turns blue emission, related surficial Cl vacancies that or exposed due desorption surfactants. Under continuous UV irradiation, photo repairing effect, emission vanishes, color recovers green. Based this photochromic drawn exposure mask. Moreover, can again return heating at 100 °C. Thus, photochromism‐induced be simply erased effect. Therefore, thermal erasure demonstrated reversible .

Language: Английский

Citations

15
Tuneable Efficient White Emission of Sb3+/Mn2+ Co-Doped Lead-Free Perovskites for Single-Component White Light-Emitting Diodes DOI

Yuanyuan Sheng,

Ping Chen,

Yanpeng Gao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(15), P. 19175 - 19183

Published: April 4, 2024

Inorganic lead-free perovskite nanocrystals (NCs) with broadband self-trapped exciton (STEs) emission and low toxicity have shown enormous application prospects in the field of display lighting. However, white light-emitting diodes (WLEDs) based on a single-component material high photoluminescence quantum yield (PLQY) remain challenging. Here, we demonstrate novel codoping strategy by introducing Sb3+/Mn2+ ions to achieve tuneable dual Cs3InCl6 NCs. The PLQY increases 59.64% after doping Sb3+. codoped NCs exhibit efficient light due energy transfer channel from STEs Mn2+ 51.38%. Density functional theory (DFT) calculations been used verify deeply effects doping. WLEDs Sb3+/Mn2+-codoped are explored color rendering index 85.5 coordinate (0.398, 0.445), which successfully applied as photodetector lighting sources. This work provides new perspective for designing perovskites WLEDs.

Language: Английский

Citations

10
RGB tri-luminescence in organic–inorganic zirconium halide perovskites DOI Creative Commons

Chuying Wang,

Meng Wen,

Guigen Luo

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: 15(8), P. 2954 - 2962

Published: Jan. 1, 2024

Materials with two or more fluorescence features under different excitation sources have great potential in optical applications, but luminous materials three emission characteristics been largely undeveloped. Here, we report a novel zero-dimensional (0D) organic-inorganic hybrid ((C

Language: Английский

Citations

9
Synergistic ligand mediated anion exchange of CsPbI3 quantum dots for high performance white LED and anti‐counterfeiting DOI Creative Commons
Yajing Chang, Guoqing Tong, Liping Liu

et al.

EcoMat, Journal Year: 2024, Volume and Issue: 6(3)

Published: March 1, 2024

Abstract Anion exchange is an effective strategy to regulate the composition and optoelectronic properties of perovskite quantum dots (PQDs). Though promising, it more desirable synthesize PQDs avoid decrease photoluminescence yield (PLQY). Herein, we developed a ligand mediated anion approach, in which phase transition from CsPbBr 3 QDs CsPbI was observed with introduction N‐Acetyl‐ l ‐cysteine (NAC) 1,3‐dimethylimidazolium iodide (DMII) aqueous solution solution. NAC expected create halogen vacancies QDs, provides sufficient adsorption sites for I − ions, resulting accelerating rate process DMII incorporation. Benefiting synergistic exchange, high PLQY 97% remarkable stability are obtained. Furthermore, white light‐emitting diode (WLED) lumen efficiency (LE) 116.82 lm/W constructed, showing under continuous operation. image

Language: Английский

Citations

6
Sb3+/Mn2+ co-doped lead-free Cs2KYCl6 perovskites for white light-emitting diodes DOI

Muhammad Gulzari,

Z.Y. Liu,

Junchun Li

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(18), P. 6606 - 6614

Published: Jan. 1, 2024

In Sb 3+ /Mn 2+ co-doped Cs 2 KYCl 6 , energy transfer from self-trapped excitons (STEs) of to Mn produces dual emissions, which has been applied for white light-emitting diodes with chromaticity coordinates (0.3483, 0.4125) and a color-rendering index 85.4.

Language: Английский

Citations

4
Moisture‐Resistant Orange Emitters with Near‐Unity Quantum Yield from Mn2+ Alloyed Vacancy‐Ordered Quadruple Perovskites DOI
Peipei Dang, Qianqian Gu,

Guodong Zhang

et al.

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: April 9, 2024

Abstract Mn 2+ ‐doped metal halide perovskites present remarkable optical properties in optoelectronic applications, although the realization of high efficiency and stability is still a challenge. In this work, series highly efficient stable orange‐emitting alloyed Cs 4 Cd 1‐ x Bi 2 Cl 12 single crystals are successfully synthesized via hydrothermal reaction. Combined with crystal structure spectral characterization at 7 K, site occupation defect emission systematically discussed. Benefiting from effective [BiCl 6 ] 3− →[MnCl 4− energy transfer lattice distortion, these exhibit maximum internal external quantum yield ≈97% ≈65% 35% heavy doping level. Interestingly, ‐alloyed remarkably waterproof stability, no decrease intensity observed after immersion deionized water for h. After soaking 100 days, can maintain 44%, implying good chemical moisture resistance due to formation protective BiOCl layer. This work provides new insights into optimization mechanism luminescence overcoming downside their waterproofing humid conditions.

Language: Английский

Citations

4
Efficient zero-dimensional near-infrared perovskite synthesis using an ultrasound-assisted strategy and its application in information encryption DOI
Xiaoshuang Li, Shu-Rong Chen, Bo Wang

et al.

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 43, P. 102518 - 102518

Published: Jan. 1, 2025

Language: Английский

Citations

0
Designing Polychromatic Luminescence in Mn2+-Doped Cs2NaLuCl6 Double Perovskite Crystals via Energy Transfer Engineering for Optical Thermometry and X-ray Imaging DOI

Xuanyu Ge,

Quan Zhang, Ting Fei

et al.

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

Published: Feb. 2, 2025

Metal halide double perovskites with splendid optical features have been considerably investigated for optoelectronic applications. Herein, a series of Mn2+-doped Cs2NaLuCl6 perovskite crystals were prepared. Via adopting the density functional theory calculation, effect Mn2+ doping on electronic structure compound was discussed. It found that crystal can emit intense blue light from host self-trapped exciton (STE) emission. Excited by 320 nm, STE and emissions simultaneously observed in resulting crystals. Owing to efficient energy transfer Mn2+, polychromatic luminescence final products. Moreover, taking advantage various responses emission intensities temperature, thermometric characteristics investigated, their maximum relative sensitivity is 0.99% K-1, which hardly impacted content. Furthermore, prepared exhibit good X-ray radioluminescence properties, low detection limitation 0.99 μGyair s-1. Additionally, utilizing designed crystal, flexible imaging high resolution 20 lp mm-1 be operated high-temperature environment realized. These results indicated are suitable thermometry imaging.

Language: Английский

Citations

0
Tailoring Self‐Trapped Exciton Emission in 0D Indium‐Based Perovskites by Solvent‐Induced Crystal Structure Engineering DOI

Yusheng Xu,

Ruijing Yang,

Qiudong Duan

et al.

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

Published: March 12, 2025

Abstract 0D indium‐based all‐inorganic metal halide perovskites offer great potential for multifunctional applications but face the challenges of poor structural adjustability and an incomplete dynamic picture self‐trapped exciton (STE) emissions. Here, a novel Cs 4 InCl 7 single crystal is developed as solvation bridge phase transformations to either 2 5 ·H O via water or into 3 6 by methanol. The diversified structures not only enrich emission colors also difference in coordination number symmetry + , laying foundations comprehending influence A‐site on STE Steady‐state transient spectroscopy together with density functional theory simulations, reveal that low geometry charge octahedron facilitate excited state distortions, leading strong second‐order Jahn‐Teller (SOJT) effect large Stokes shift Multicolor tuning Sb 3+ ‐doped under solvent heat stimuli enables extended optical anti‐counterfeiting, temperature sensing, sensors. work offers improved understanding SOJT manipulation atomic engineering lead‐free sheds light their broad practical applications.

Language: Английский

Citations

0
Synergistic effect of Manganese stearate encapsulating CsPbI3 perovskite quantum dots with high phase stability DOI
Yajing Chang, Liping Liu, Jinhua Zhang

et al.

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179954 - 179954

Published: March 1, 2025

Language: Английский

Citations

0