The effect of solvent on the formation of low-dimensional metal halides and their self-trapped exciton emission

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150257 - 150257

Published: March 8, 2024

Low-dimensional organic–inorganic hybrid metal halides, with broadband luminescence, have attracted much attention for optoelectronic applications due to their rich in structural diversity and solution processibility. However, it is still unclear about how the solvent molecules influence properties of processed low-dimensional halides. Here, we prepared five different antimony-based crystal structures, [SbCl6]3- as halide octahedron 4, 4-difluoropiperidine (DFPD+) organic cation, by using solvents: hydrochloric acid (HCl) aqueous four solvents (dimethylformamide (DMF), methanol (MeOH), acetonitrile (ACN) dimethylacetamide (DMAC)). We revealed relation between structures optical properties, found participation structure causes significant lattice distortions, which beneficial achieving self-trapped exciton (STE) emission. Among them, (DFPD)6SbCl9·2DMAC exhibits a remarkable photoluminescence (PL) quantum yield approximately 90 %. The STE dynamics were characterized femtosecond transient absorption time-resolved PL spectroscopies. Simultaneously, this study also provides new directions expanding application luminescent halides: addition UV-LEDs, efficient rapid detection or can be achieved raw materials, while realizing potential multi-level anti-counterfeiting.

Language: Английский

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Lead-free perovskite Cs3Bi2Br9 quantum dots (QDs)/ultra-thin W18O49 nanobelts S-scheme heterojunction toward optimized photocatalytic CO2 reduction coupled with toluene oxidation

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159635 - 159635

Published: Jan. 1, 2025

Language: Английский

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Composite of lead-free halide perovskite Cs3Bi2Br9 with TiO2 as an efficient photocatalyst for C(sp3)−H bond activation

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 333, P. 122812 - 122812

Published: April 25, 2023

Language: Английский

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Pseudo‐2D Layered Organic‐Inorganic Manganese Bromide with a Near‐Unity Photoluminescence Quantum Yield for White Light‐Emitting Diode and X‐Ray Scintillator

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(45)

Published: Sept. 25, 2023

Abstract Eco‐friendly lead‐free organic–inorganic manganese halides (OIMHs) have attracted considerable attention in various optoelectronic applications because of their superior optical properties and flexible solution processibility. Herein, we report a novel pseudo‐2D layered OIMH (MTP) 2 MnBr 4 (MTP: methyltriphenylphosphonium), which exhibits intense green emission under UV/blue or X‐ray excitation, with near‐unity photoluminescence quantum yield, high resistance to thermal quenching (I 150 °C =84.1 %) good photochemical stability. These features enable as an efficient phosphor for blue‐converted white light‐emitting diodes, demonstrating commercial‐level luminous efficiency 101 lm W −1 wide color gamut 116 % NTSC. Moreover, these crystals showcase outstanding scintillation properties, delivering light yield 67000 photon MeV , detection limit 82.4 nGy s competitive spatial resolution 6.2 lp mm imaging. This work presents new avenue the exploration eco‐friendly luminescent OIMHs towards multifunctional applications.

Language: Английский

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Recent developments in lead-free bismuth-based halide perovskite nanomaterials for heterogeneous photocatalysis under visible light

Nanoscale, Journal Year: 2023, Volume and Issue: 15(12), P. 5598 - 5622

Published: Jan. 1, 2023

This mini-review presents a brief overview of recent progress in bismuth-based halide perovskite (BHP) nanomaterials for heterogeneous photocatalysis under visible light, including the synthesis and physical–chemical properties advanced BHPs.

Language: Английский

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Nature of Self-Trapped Exciton Emission in Zero-Dimensional Cs₂ZrCl₆ Perovskite Nanocrystals

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(34), P. 7665 - 7671

Published: Aug. 21, 2023

Low dimensional perovskite-inspired materials with self-tapped exciton (STE) emission have stimulated a surge of cutting-edge research in optoelectronics. Despite numerous efforts on developing versatile low-dimensional efficient STE emissions, there is little emphasis the intrinsic dynamics STE-based broad these materials. Here, we investigated excited state zero-dimensional (0D) Cs2ZrCl6 nanocrystals (NCs) blue emission. By using femtosecond transient absorption (fs-TA) spectroscopy, ultrafast formation process within 400 fs directly observed. Then, formed STEs relax to an intermediate lifetime ∼180 ps before reaching emissive ∼15 μs. Our work offers comprehensive and precise dynamic picture metal halides sheds light extending their potential applications.

Language: Английский

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Recent Advances and Opportunities in Low‐Dimensional Layered Perovskites for Emergent Applications beyond Photovoltaics

Advanced Materials Technologies, Journal Year: 2023, Volume and Issue: 8(17)

Published: June 21, 2023

Abstract Layered metal halide perovskites have attracted enormous research attention over the last few years, befitting their unique optical and electronic properties. Low‐dimensional layered demonstrate great potential for various optoelectronic sensing applications beyond photovoltaics. Herein, recent progress opportunities in 2D quasi‐2D light‐emitting diodes (LEDs), lasers, memristors, neuromorphic/synaptic applications, UV–vis photodetection, X‐ray detection, scintillators, photocatalytic are reviewed. First, crystal structure, characteristics, fundamental properties of discussed. Recent efforts developments perovskite with excellent luminescence Unique perovskites, such as negligible leakage current due to restricted carrier transport, high stability, hydrophobicity, make them viable memristor devices. After discussing neuromorphic devices using outstanding performance photodetection including polarization‐sensitive is recently proved a superior candidate detection stability. Further, scintillation ionizing radiation Finally, some very achievements present future outlook, exciting this burgeoning field highlighted.

Language: Английский

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Pseudo‐2D Layered Organic‐Inorganic Manganese Bromide with a Near‐Unity Photoluminescence Quantum Yield for White Light‐Emitting Diode and X‐Ray Scintillator

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 135(45)

Published: Sept. 25, 2023

Abstract Eco‐friendly lead‐free organic–inorganic manganese halides (OIMHs) have attracted considerable attention in various optoelectronic applications because of their superior optical properties and flexible solution processibility. Herein, we report a novel pseudo‐2D layered OIMH (MTP) 2 MnBr 4 (MTP: methyltriphenylphosphonium), which exhibits intense green emission under UV/blue or X‐ray excitation, with near‐unity photoluminescence quantum yield, high resistance to thermal quenching (I 150 °C =84.1 %) good photochemical stability. These features enable as an efficient phosphor for blue‐converted white light‐emitting diodes, demonstrating commercial‐level luminous efficiency 101 lm W −1 wide color gamut 116 % NTSC. Moreover, these crystals showcase outstanding scintillation properties, delivering light yield 67000 photon MeV , detection limit 82.4 nGy s competitive spatial resolution 6.2 lp mm imaging. This work presents new avenue the exploration eco‐friendly luminescent OIMHs towards multifunctional applications.

Language: Английский

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Narrow-Bandgap Halide Perovskite Cs₄CuSb₂Cl₁₂ with Full-Spectrum Photothermal Conversion

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(1), P. 336 - 345

Published: Jan. 4, 2024

Light-to-heat conversion represents one of the most promising pathways to utilize full-spectrum solar energy. The key for boosting photothermal in semiconductor-based light absorbers relies on narrowing bandgap harvesting wide-range sunlight and localizing thermal energy via decreasing heat loss. Here, we demonstrate first example using a halide perovskite, Cs4CuSb2Cl12, as material efficient solar-to-heat conversion, with an intrinsic narrow ultralow conductivity. Full-spectrum (200–2500 nm) absorption solar-thermal efficiency up 93.4% are achieved. property enables low-temperature rapid hydrogen production from ammonia borane, 2.0 equiv released, activation 12.2% is realized, without any extra input. This high performance not only provides potential energy-efficient on-board supply fuel cells but also opens new field perovskites utilized convertors.

Language: Английский

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Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO₂ Reduction

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1932 - 1975

Published: April 4, 2024

Carbon dioxide (CO2), an archetypal greenhouse gas, can be transformed into valuable fuels through photocatalysis, presenting auspicious avenue for combating global climate change and energy crisis. While halide perovskites have sparked substantial research interest, concerns over lead toxicity spurred exploration of their lead-free counterparts CO2 photoreduction. This comprehensive Review navigates the fundamentals reduction, delving basic principles, mechanisms, relevant operando techniques. It then introduces diverse structures (LFHPs), synthesis methodologies, intrinsic properties that render them suitable Subsequently, unfolds application modification strategies light-driven conversion, highlighting breakthroughs shedding light on potential mechanisms. Finally, current challenges to tailor LFHPs robust photocatalytic reduction are critically discussed, offering insights future in this realm. aims illuminate path toward sustainable bridging knowledge gaps inspiring innovations a greener carbon-neutral tomorrow.

Language: Английский

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