Multisite Fine‐Tuning in Hybrid Cadmium Halides Enables Wide Range Emissions for Anti‐Counterfeiting DOI
Zhizhuan Zhang, Jiance Jin, Yang‐Peng Lin

и другие.

Angewandte Chemie, Год журнала: 2024, Номер 136(15)

Опубликована: Фев. 13, 2024

Abstract Achieving tunable emissions spanning the spectrum, from blue to near‐infrared (NIR) light, within a single component is formidable challenge with significant implication, particularly in tailoring multicolor luminescence for anti‐counterfeiting purposes. In this study, we demonstrate broad spectrum of emissions, covering red and extending into NIR light [BPy] 2 Cd X 4 : x Sb 3+ (BPy=Butylpyridinium; =Cl, Br; =0 0.08) through precise multisite structural fine‐tuning. Notably, CdBr manifest distinctive pattern, transitioning yellow tandem host further its homologous CdCl , resulting simultaneous presence intersecting independent emission colors. Detailed modulation chemical composition enables partial switching, facilitating creation diverse patterns by employing as phosphors. This study first time successfully implements several groups colors matrix via Such an effective strategy not only develops specific relationships between adjustable compositions, but also introduces cost‐effective straightforward approach achieving unique, high‐level, plentiful‐color multiple‐information‐storage labels advanced applications.

Язык: Английский

Broadband Emission Origin in Metal Halide Perovskites: Are Self‐Trapped Excitons or Ions? DOI
Feng Jiang, Zhennan Wu, Min Lu

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(51)

Опубликована: Март 29, 2023

Abstract It has always been a goal to realize high efficiency and broadband emission in single‐component materials. The appearance of metal halide perovskites makes it possible. Their soft lattice characteristics significant electron–phonon coupling synergistically generate self‐trapped excitons (STEs), contributing with large Stokes shift. Meanwhile, their structural/compositional diversity provides suitable active sites coordination environments for doping ns 2 ions, allowing 3 P n ( =0,1,2) → 1 S 0 transitions toward emission. ions is phenomenologically similar that STE emission, hindering in‐depth understanding origin, leading failure meet the design requirements practical applications. In this scenario, herein, fundamentals development such two mechanisms are summarized establish clear comprehensive phenomenon, which may pave way an ideal customization broadband‐emission perovskites.

Язык: Английский

Процитировано

89
Multisite Fine‐Tuning in Hybrid Cadmium Halides Enables Wide Range Emissions for Anti‐Counterfeiting DOI
Zhizhuan Zhang, Jiance Jin, Yang‐Peng Lin

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(15)

Опубликована: Фев. 13, 2024

Abstract Achieving tunable emissions spanning the spectrum, from blue to near‐infrared (NIR) light, within a single component is formidable challenge with significant implication, particularly in tailoring multicolor luminescence for anti‐counterfeiting purposes. In this study, we demonstrate broad spectrum of emissions, covering red and extending into NIR light [BPy] 2 Cd X 4 : x Sb 3+ (BPy=Butylpyridinium; =Cl, Br; =0 0.08) through precise multisite structural fine‐tuning. Notably, CdBr manifest distinctive pattern, transitioning yellow tandem host further its homologous CdCl , resulting simultaneous presence intersecting independent emission colors. Detailed modulation chemical composition enables partial switching, facilitating creation diverse patterns by employing as phosphors. This study first time successfully implements several groups colors matrix via Such an effective strategy not only develops specific relationships between adjustable compositions, but also introduces cost‐effective straightforward approach achieving unique, high‐level, plentiful‐color multiple‐information‐storage labels advanced applications.

Язык: Английский

Процитировано

31
Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal DOI
Ranran Sun, Mochen Jia, Xu Chen

и другие.

Laser & Photonics Review, Год журнала: 2023, Номер 18(5)

Опубликована: Дек. 31, 2023

Abstract Lanthanide ions, as dopants, have evoked widespread research interest owing to the rich optical, magnetic, and electrical properties, but their luminescent intensity is always limited by typical concentration quenching. Herein, a holmium‐based double perovskite of Cs 2 NaHoCl 6 reported, which surprisingly breaks through this barrier achieves efficient red‐NIR emission virtue large unit cell, low phonon energy, high content activators, cross relaxation phenomenon between Ho 3+ . The heavy also endows intriguing half‐metallic nature with down‐spin conducting band an up‐spin insulating band. After performing ion doping on crystallographic sites Na + , photoluminescence quantum yield such emitter under 450 nm excitation dramatically promoted 82.3%, benefiting from improved crystal field environment that alleviates parity forbidden rule suppresses non‐radiative recombination loss. Furthermore, heat‐favorable phonon‐assisted population processes enable robust photostability against thermal By combining chip, light‐emitting diodes are fabricated, in wide‐coverage NIR emissions ideally suited for medical light source, night vision, nondestructive examination, transmission imaging. It believed work will open avenue enhancing fluorescence lanthanide ions developing advanced spintronic materials.

Язык: Английский

Процитировано

31
Achieving Tunable Cold/Warm White-Light Emission in a Single Perovskite Material with Near-Unity Photoluminescence Quantum Yield DOI Creative Commons
Bo Zhou,

Aixuan Du,

Dong Ding

и другие.

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Авг. 31, 2023

Single materials that exhibit efficient and stable white-light emission are highly desirable for lighting applications. This paper reports a novel zero-dimensional perovskite, Rb4CdCl6:Sn2+, Mn2+, which demonstrates exceptional properties including adjustable correlated color temperature, high rendering index of up to 85, near-unity photoluminescence quantum yield 99%. Using co-doping strategy involving Sn2+ cyan-orange dual-band with complementary spectral ranges is activated by the self-trapped excitons d-d transitions Mn2+ centers in Rb4CdCl6 host, respectively. Intriguingly, although ions doped difficult excite, can be realized through an ultra-high-efficient energy transfer between via formation adjacent exchange-coupled Sn-Mn pairs. Benefiting from this Dexter process, dual shares same optimal excitation wavelengths suppresses non-radiative vibration relaxation significantly. Moreover, relative intensities dual-emission components modulated flexibly adjusting fraction approach short-range represents promising avenue achieving high-quality white light within single material.

Язык: Английский

Процитировано

27
The future of self-driving laboratories: from human in the loop interactive AI to gamification DOI Creative Commons
Holland Hysmith, Elham Foadian, Shakti P. Padhy

и другие.

Digital Discovery, Год журнала: 2024, Номер 3(4), С. 621 - 636

Опубликована: Янв. 1, 2024

Self-driving laboratories (SDLs) are the future for scientific discovery in a world growing with artificial intelligence. The interaction between scientists and automated instrumentation leading conversations about impact of SDLs on research.

Язык: Английский

Процитировано

17
Near-unity photoluminescence quantum yield in zero-dimensional lead-free indium-based hybrid perovskites by antimony doping DOI

Jingheng Nie,

Xiangyan Yun, Fangrui Cheng

и другие.

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(7), С. 2571 - 2577

Опубликована: Янв. 1, 2024

High-performance broadband emission with a near-unity photoluminescence quantum yield of ∼99.3% was observed in (C 4 H 12 N) 2 InC 5 ·DMF:Sb 3+ hybrid perovskites, which can be attributed to the self-trapped excitons [SbCl ·DMF] 2− polyhedron.

Язык: Английский

Процитировано

14
Achieving Strong Circularly Polarized Luminescence through Cascade Cationic Insertion in Lead‐free Hybrid Metal Halides DOI
Tao Song, Qiang Wang,

Haolin Lu

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(21)

Опубликована: Март 28, 2024

Abstract Generating circularly polarized luminescence (CPL) with simultaneous high photoluminescence quantum yield (PLQY) and dissymmetry factor ( g lum ) is difficult due to usually unmatched electric transition dipole moment μ magnetic m of materials. Herein we tackle this issue by playing a “cascade cationic insertion” trick achieve strong CPL (with PLQY ~100 %) in lead‐free metal halides values reaching −2.3×10 −2 without using any chiral inducers. Achiral solvents hydrochloric acid (HCl) N, N ‐dimethylformamide (DMF) infiltrate the crystal lattice via asymmetric hydrogen bonding, distorting perovskite structure induce “intrinsic” chirality. Surprisingly, additional insertion Cs + cation substitute partial (CH 3 2 NH transforms space group achiral but maintains chiroptical activity. Further doping Sb 3+ stimulates as result self‐trapped excitons (STEs) formation disturbing framework. The perovskites indium‐antimony chlorides embedded on LEDs chips demonstrate promising potential emitters. Our work presents rare cases activity highly luminescent from only building blocks spontaneous resolution symmetry breaking.

Язык: Английский

Процитировано

12
Recent Developments in Halide Perovskite Nanocrystals for Indirect X‐ray Detection DOI Creative Commons
О.A. Balitskii,

Mykhailo Sytnyk,

Wolfgang Heiß

и другие.

Advanced Materials Technologies, Год журнала: 2024, Номер 9(20)

Опубликована: Май 26, 2024

Abstract Metal halide perovskites are revolutionizing X‐ray detection through a combination of low cost, solution processing, favorable optoelectronic properties, and high stopping power for high‐energy ionizing radiation. While perovskite single crystals polycrystalline wafers considered direct converters, most medical applications based on scintillators that shift radiation into the visible. Several materials market, but demonstrations CsPbBr 3 nanocrystals, possibly embedded in matrix material or combined with organic molecules as luminescent species, highlight their competitiveness established terms radioluminescence yield transient behavior. Major hurdles nanocrystal must overcome environmental stability toxicity. there still few examples high‐performance lead‐free scintillators, microcrystalline emerging promising reduced toxicity, significant Stokes shifts to avoid reabsorption emission thick films. Thus, near future scintillator will primarily be adoption recipes proven properties form. The colloidal solutions facilitate large‐scale printing homogeneous scattering‐free films obtain contrast spatial resolution images by scintillation.

Язык: Английский

Процитировано

12
Morphological, structural, optical and dielectric analysis of Cs2TiBr6 perovskite nanoparticles DOI Creative Commons
Mohamed Ben Bechir, Faisal Alresheedi

RSC Advances, Год журнала: 2024, Номер 14(3), С. 1634 - 1648

Опубликована: Янв. 1, 2024

In the pursuit of lead-free perovskite materials suitable for harnessing solar energy, a recent discovery has emerged regarding Cs 2 TiBr 6 .

Язык: Английский

Процитировано

11
Efficient Circularly Polarized Luminescence and Bright White Emission from Hybrid Indium‐Based Perovskites via Achiral Building Blocks DOI
Liping Du, Qiwei Zhou,

Qingqing He

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер 34(28)

Опубликована: Март 12, 2024

Abstract Chiral organic‐inorganic hybrid perovskites (OIHPs) exhibit exceptional optical and chiral properties, demonstrating potential for 3D display, circularly polarized light‐emitting diodes (CP‐LEDs), CPL switches. However, the construction of OIHPs often relies on building blocks, limiting chemical diversity, possessing challenges in achieving large asymmetry factor ( g lum ) without sacrificing photoluminescence quantum yield (PLQY). Here, DMA 4 In 1‐ x Sb Cl 7 (DMA = dimethylammonium, 0 to 1) with superior luminescence (CPL) are successfully constructed based achiral blocks + metal halides. By optimizing 3+ content, bright white emission a high PLQY 69.13% is achieved, as well near‐unity yellow strong signals up +1.40 × 10 −2 , exhibiting performance comparable state‐of‐the‐art OIHPs. Combining characterizations theoretical calculations reveal that these intriguing properties originate from intrinsic helical structures pair perfect complementary color emissions . addition, excellent thermal stability mild quenching temperature range 300 420 K. These fascinating suggest have significant applications (WLED), displays anti‐counterfeiting.

Язык: Английский

Процитировано

10