Full-color, time-valve controllable and Janus-type long-persistent luminescence from all-inorganic halide perovskites

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Июнь 20, 2024

Abstract Long persistent luminescence (LPL) has gained considerable attention for the applications in decoration, emergency signage, information encryption and biomedicine. However, recently developed LPL materials – encompassing inorganics, organics inorganic-organic hybrids often display monochromatic afterglow with limited functionality. Furthermore, triplet exciton-based phosphors are prone to thermal quenching, significantly restricting their high emission efficiency. Here, we show a straightforward wet-chemistry approach fabricating multimode by introducing both anion (Br − ) cation (Sn 2+ doping into hexagonal CsCdCl 3 all-inorganic perovskites. This process involves establishing new trapping centers from [CdCl 6-n Br n ] 4− and/or [Sn 2-n Cd Cl 9 5− linker units, disrupting local symmetry host framework. These halide perovskites demonstrate duration time ( > 2,000 s), nearly full-color coverage, photoluminescence quantum yield ~ 84.47%), anti-thermal quenching temperature up 377 K. Particularly, : x %Br temperature-dependent time-valve controllable time-dependent luminescence, while %Sn exhibit forward reverse excitation-dependent Janus-type luminescence. Combining experimental computational studies, this finding not only introduces local-symmetry breaking strategy simultaneously enhancing lifetime efficiency, but also provides insights dynamic tunability photonics, high-security anti-counterfeiting storage.

Язык: Английский

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Sb³⁺-Doped Indium-Based Metal Halide (Gua)₃InCl₆ with Efficient Yellow Emission

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(3), С. 3841 - 3852

Опубликована: Янв. 11, 2024

In recent years, low-dimensional organic–inorganic hybrid metal halides (OIHMHs) have shown excellent photophysical properties due to their quantum structure, adjustable energy levels, and transfer between inorganic organic components, which attracted extensive attention from researchers. Herein, we synthesize a zero-dimensional (0D) OIHMH, Sb3+:(Gua)3InCl6, by introducing Sb3+ into (Gua)3InCl6, undergoes significant enhancement of the emission peak at 580 nm with photoluminescence yield (PLQY) boosted 17.86 95.72% when excited 340 nm. This boost in doped sample was studied combining ultrafast femtosecond transient absorption, temperature-dependent (PL) spectra, density functional theory (DFT) calculation, revealing process self-trapped exciton (STE) recombination emit light both Sb sites this 0D structure simultaneously. material lowest dark STE level site for undoped can amazingly very strong sample, has never been observed before. Finally, tested its application photoelectric device. work not only helps gain deeper understanding formation STEs In-based but also plays certain guiding role design new luminescent materials.

Язык: Английский

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Modulation of trap distribution by optimizing Mn2+ doping in CsCdCl3 crystals toward enhanced afterglow performance

Applied Physics Letters, Год журнала: 2024, Номер 124(9)

Опубликована: Фев. 26, 2024

Exploring efficient and stable long-persistent luminescence (LPL) materials is of great value for promoting their advanced applications. Here, the metal halide CsCdCl3:Mn2+ crystals with tunable afterglow properties good stability were grown by a facile solution method. Upon ultraviolet excitation, exhibited bright orange emission at 590 nm from d–d transition Mn2+ ions. doping concentrations matter LPL performance. By optimizing amount Mn2+, an enhanced duration up to 12 000 s was achieved, compared undoped sample, originating trap redistribution. The deep traps in CsCdCl3:0.1Mn2+ crystal that provide little contribution room temperature shifted shallow levels, thus synergistically enhancing intensity duration. Based on variable durations tuning concentrations, multi-dimensional information storage encryption model designed. This work gives understanding effect provides examples development encryption.

Язык: Английский

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Luminescence From Localized States in Solids: A First‐Principles Perspective

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Localized‐state luminescence (LSL) has emerged as a promising mechanism for high‐performance optoelectronic applications, including lighting, photodetection, and quantum technologies. Characterized by rich intriguing spectral features, LSL involves significant electron‐phonon coupling, which varies in strength across different systems. First‐principles methods, particularly density functional theory (DFT) its extensions provide an efficient framework modeling the process with reasonable accuracy. This comprehensive review examines DFT‐based studies on three representative types of solids: from self‐trapped excitons (STEs), normal defects, intentionally doped ions. The discussion begins overview entire process, highlighting computational methods excited state structures energies, well simulations luminescent spectrum within multi‐phonon transition framework. Detailed discussions follow, focusing structural distortion modes STEs, behavior mechanisms Finally, strategies to address current challenges advance theoretical design materials are proposed, offering valuable insights future developments field.

Язык: Английский

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Heterovalent Doping in CsCdCl₃ Enabled Tunable Multimode Luminescence and Photochromism Toward Multilevel Anti‐Counterfeiting

Advanced Optical Materials, Год журнала: 2023, Номер 12(11)

Опубликована: Дек. 10, 2023

Abstract Integrating self‐trapped excitons (STEs), dopants, and defect levels in a single‐component metal halide perovskite will be of significance for tunable multimode luminescence photochromism. Here, platform utilizing interactions STEs, defects, alien dopants CsCdCl 3 by heterovalent doping strategy is demonstrated, which the photoluminescence quantum efficiency improved, more importantly, emissions can manipulated statically dynamically changing excitation wavelength/irradiation time. Meanwhile, presence carrier trapping de‐trapping processes leads to bright orange–near‐infrared persistent photochromic behaviors, quickly erased white light, enabling visual displays codable dark dual‐fields. Inspired these versatile optical characteristics doped luminescent halides, multilevel encryption anti‐counterfeiting with advantages nondestructive convenient authentication constructed.

Язык: Английский

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Trap engineering through chemical doping for ultralong X-ray persistent luminescence and anti-thermal quenching in Zn₂GeO₄

Journal of Materials Chemistry C, Год журнала: 2023, Номер 12(5), С. 1728 - 1745

Опубликована: Дек. 18, 2023

Temperature-dependent photoluminescence to understand negative thermal quenching in Zn 2 GeO 4 , and Pr 3+ doping for trap tuning the enhanced formation of defect states leading ultralong (>18 h) X-ray persistent luminescence.

Язык: Английский

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Antimony doping towards fast digital encryption and decryption and high-efficiency WLED in zero-dimensional hybrid indium chlorides

Chemical Engineering Journal, Год журнала: 2024, Номер 494, С. 153060 - 153060

Опубликована: Июнь 12, 2024

Язык: Английский

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Long-Persistent High-Temperature Phosphorescence of Zero-Dimensional Metal Halide Hybrid for Temperature-Sensitive Anticounterfeiting

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(1), С. 1319 - 1326

Опубликована: Янв. 4, 2024

Solid-state materials with long-persistence phosphorescence always suffer serious thermal quenching effect that greatly hinders their applications at high-temperature conditions (>373 K). Therefore, developing (HTP) remains a great challenge. In this work, cytosine (Cyt) is hybridized indium chloride into zero-dimensional (Cyt)2[InCl5·H2O] (CICH). A green afterglow up to 1.0 s observed room temperature for CICH but almost quenched 448 K due the effect. Upon removing coordinated H2O molecules of (denoted CIC), CIC shows an excellent performance HTP persistence time 0.4 even K. The improved resistance attributed removal molecules, which leads reduced free volume Cyt, thereby suppressing molecular vibration and rotation. Additionally, can be facilely tailored through Sb3+ doping efficient triplet energy transfer. At last, given high tolerance CIC, temperature-sensitive anticounterfeiting successfully demonstrated.

Язык: Английский

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Anti-counterfeiting applications of antimony-doped zero-dimensional indium halide with temperature-responsive broad emission

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151655 - 151655

Опубликована: Апрель 25, 2024

Язык: Английский

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Afterglow Phosphor Goes Transparent

The Journal of Physical Chemistry Letters, Год журнала: 2023, Номер 14(44), С. 10003 - 10011

Опубликована: Окт. 31, 2023

Recently, transparent afterglow phosphors have attracted increasing interest due to the mitigated self-absorption and ensuing improved light output, which inspired many advanced applications, including volumetric display three-dimensional optical encryption. To date, most successful remain those traditional oxide, nitride, or sulfide powders are not a severe scattering effect. By reduction of number interfaces engineering refractive index, effect could be circumvented effectively. this end, four material systems, single crystals, phosphorescent organics, glass, luminescent nanocomposites, were reviewed in Perspective. We started with discussion nontransparency origin. Through careful inspection Rayleigh theory, general solution involving both index particle size was proposed reduce Many representative works on systematically reviewed, where typical synthesis methods advantages disadvantages each system critically presented. In last part, bottlenecks, prospects, future development directions based proposed.

Язык: Английский

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