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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Long-lived dynamic room temperature phosphorescent carbon dots for advanced sensing and bioimaging applications

Coordination Chemistry Reviews, Год журнала: 2024, Номер 516, С. 215987 - 215987

Опубликована: Май 31, 2024

Язык: Английский

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Molecular design, synthesis, properties, and applications of organic triplet emitters exhibiting blue, green, red and white room-temperature phosphorescence

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(8), С. 2662 - 2698

Опубликована: Янв. 1, 2024

Theoretical and experimental approaches for the development of organic room temperature phosphorescence compounds exhibiting blue, green, red, white emissions many potential applications are analysed classified.

Язык: Английский

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A Facile Strategy for Achieving Polymeric Afterglow Materials with Wide Color‐Tunability and Persistent Near‐Infrared Luminescence

Advanced Functional Materials, Год журнала: 2023, Номер 34(12)

Опубликована: Дек. 10, 2023

Abstract Polymer‐based room‐temperature phosphorescence (RTP) materials show promising applications in anti‐counterfeiting. To further realize multiscale and/or multimodal anti‐counterfeiting, it is highly desirable to develop polymeric afterglow with multiple security features. Herein, a facile strategy presented endow ultralong lifetime, wide color‐tunability, persistent near‐infrared (NIR) luminescence, and good water solubility via constructing non‐traditional resonance energy transfer (PRET) two‐step sequential systems. Specifically, the 1‐bromocarbazole derivatives blue‐color RTP property act as donor while traditional dyes red/NIR luminescence acceptor. By simply regulating doping composition concentration of these systems, multicolor organic covering from visible NIR region successfully realized. Notably, compared single‐step PRET, has unique advantages higher efficiency triplet excitons initial donor, wider range color‐tunability mediated by intermediary acceptor, enhanced delayed fluorescence final Finally, water‐soluble great potential advanced anti‐counterfeiting information technologies.

Язык: Английский

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Microwave‐Responsive Flexible Room‐Temperature Phosphorescence Materials Based on Poly(vinylidene fluoride) Polymer

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(50)

Опубликована: Окт. 27, 2023

The development of flexible, room-temperature phosphorescence (RTP) materials remains challenging owing to the quenching their unstable triplet excitons via molecular motion. Therefore, a polymer matrix with Tg higher than room temperature is required prevent segment movement. In this study, RTP material was developed by incorporating 4-biphenylboronic acid (BPBA) phosphor into poly(vinylidene fluoride) (PVDF) (Tg =-27.1 °C), which exhibits remarkable UV-light-dependent oxygen consumption lifetime 1275.7 ms. adjustable performance influenced crystallinity and polymorph (α, β, γ phases) fraction PVDF, therefore, low PVDF enables polymeric segmental motion upon microwave irradiation. Consequently, reduction in an increase α phase film induces after 2.45 GHz These findings open up new avenues for constructing crystalline phase-dependent while demonstrating promising approach toward detection.

Язык: Английский

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Spectral and Temporal Manipulation of Ultralong Phosphorescence Based on Melt‐Quenched Glassy Metal–Organic Complexes for Multi‐Mode Photonic Functions

Advanced Functional Materials, Год журнала: 2024, Номер 34(23)

Опубликована: Фев. 9, 2024

Abstract Transparent glasses are ideal and robust hosts for a range of emission centers, while the simultaneous manipulation temporal spectral characteristics remains tremendous challenge inorganic glasses. Here, development functionalization melt‐quenched transparent coordinate polymer with tailorable ultralong room‐temperature phosphorescence demonstrated. Dynamic modulation is achieved by utilization high molecular rigidity spin‐orbital coupling effects within glass systems. By introducing dye molecules into glasses, Phosphorescence resonance energy transfer from matrix to exploited controllable multicolor long‐lived luminescence Further design component concentration encapsulated dyes allows wavelength‐tunable delayed fluorescence via an efficient sensitization process, featuring tunable spectrum covering wide 520 630 nm. Leveraging multiple tuning channels hybrid glass, multi‐mode optical information storage, dynamic anti‐counterfeiting applications further This work provides new material platform methodology realizing lifetime‐adjustable luminescence, which can find in time‐rsesolved display, high‐density anti‐counterfeiting.

Язык: Английский

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Disrupting n-π* Transition of Benzophenone Derivatives’ T₁ States to Achieve Ultralong-Lived Room-Temperature Phosphorescence

ACS Materials Letters, Год журнала: 2024, Номер 6(3), С. 1042 - 1049

Опубликована: Фев. 20, 2024

Benzophenone, a well-known phosphorescence emitter, features near-unity intersystem crossing efficiency but shows short lifetime of only 0.1–1 ms because significant n-π* transition character in its T1 state. Here we report benzophenone derivatives that maintain high and disrupt the transition's contribution to their states, giving emergence 2.0 s long under ambient conditions. Aromatic electron-donating substituents with low energy levels are selected build derivatives. Consequently, derivatives' states exhibit major localized excitation from aromatic minor character. The modulation electronic conjugation dihedral angles between group substituent have been found further states. After doping into rigid matrices, resultant room-temperature materials display bright afterglow, excellent processability diverse shapes, function as donors form long-wavelength afterglow via transfer, show aqueous dispersity enabled by emulsion polymerization potential bioapplication.

Язык: Английский

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Colorful Room‐Temperature Phosphorescence Including White Afterglow from Mechanical Robust Transparent Wood for Time Delay Lighting

Small Structures, Год журнала: 2024, Номер 5(7)

Опубликована: Фев. 29, 2024

The preparation of mechanical robust organic room‐temperature phosphorescence (RTP) materials especially with white afterglow is attractive but rarely reported. Herein, a method to produce colorful RTP transparent wood (PTW) by infiltrating delignified poly (vinyl alcohol) solutions containing arylboronic acids various π conjugations doubly rigid environment provided the B─O covalent bonds and hydrogen can stabilize triplet excitons, leading ultralong lifetime up 2.13 s excellent emission stability (without obviously quenching over month) target PTW. Besides, as promising structural material for optical applications, PTW shows combined advantages multicolored persistent luminescence (from blue green then red), good transmittance (≈90%), striking strength (≈154 MPa). More importantly, introducing appropriate amount fluorescent dye rhodamine 6 G afterglow, 1.85 successfully achieve through triplet‐to‐singlet Förster resonance energy transfer. function window, anticounterfeiting label, time delay lighting. This success paves way development robust, ecofriendly, practical materials.

Язык: Английский

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Intrinsic Narrowband Organic Afterglow

Chemistry of Materials, Год журнала: 2024, Номер 36(6), С. 3000 - 3012

Опубликована: Март 18, 2024

Narrowband organic afterglow materials show application in multiplexed bioimaging and others. However, featuring an intrinsic narrowband with emission lifetime >100 ms remain elusive. We report a serendipitous finding of chemical reaction from aromatic amine to luminescent acridone. Interestingly, upon doping into suitable matrix, acridone molecules display deep-blue full widths at half-maximum <40 nm CIEy < 0.08 under ambient conditions. The originates the multiresonant thermally activated delayed fluorescence (MRTADF) due suppressed vibronic coupling rigid molecular backbone system. Compared conventional ones, here MRTADF emitters feature modest kRISC 1–10 s–1 ultralong ms, which are further fashioned aqueous system exhibiting high color purity, visible-light-excitable property, potential bioapplication.

Язык: Английский

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Hierarchical Dual‐Mode Efficient Tunable Afterglow via J‐Aggregates in Single‐Phosphor‐Doped Polymer

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Авг. 19, 2024

The development of polymer-based persistent luminescence materials with color-tunable organic afterglow and multiple responses is highly desirable for applications in anti-counterfeiting, flexible displays, data-storage. However, achieving efficient from a single-phosphor system remains challenging task. Herein, by doping 9H-pyrido[3,4-b]indole (PI2) into an amorphous polyacrylamide matrix, hierarchical dual-mode emission developed, which exhibits due to excitation-, temperature-, humidity-dependence. Notably, the coexistence isolated state J-aggregate guest molecule not only provides excitation-dependent color, but also leads temperature-dependent color resulting different thermally activated delayed fluorescence (TADF) ultralong phosphorescence (UOP) behaviors aggregated states. complex responsiveness based on can serve security features through inkjet printing ink-writing. These findings may provide further insight regulated phosphors doped polymer systems expand scope stimuli-responsive broader applications.

Язык: Английский

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