Science China Chemistry, Journal Year: 2023, Volume and Issue: 66(4), P. 1120 - 1131
Published: Feb. 28, 2023
Language: Английский
Advanced Materials, Journal Year: 2022, Volume and Issue: 34(31)
Published: June 10, 2022
Abstract Smart afterglow materials in response to excitation and delay time, including crystals, polymeric films, carbon dots, have attracted considerable attention on account of their fundamental value photophysics promising applications optoelectronics. However, the fabrication amorphous flexible polymer films with fine control remains underexplored. Herein, new doped based sodium alginate aromatic carboxylates are developed, which demonstrate following advantages: (i) easy fast through aqueous solution process, (ii) flexible, transparent, re‐dissolvable characteristics, (iii) multi‐tunable colors from blue red even white control. Specifically, better controllability can be achieved co‐doping triplet‐to‐singlet Förster resonance energy transfer (TS‐FRET). Multimode advanced anti‐counterfeiting these is demonstrated using excitation‐ time‐dependent as well TS‐FRET‐mediated colors.
Language: Английский
Citations
93
Chemical Communications, Journal Year: 2023, Volume and Issue: 59(25), P. 3685 - 3702
Published: Jan. 1, 2023
The hunt for narrow-band emissive pure organic molecules capable of harvesting both singlet and triplet excitons light emission has garnered enormous attention to promote the advancement light-emitting diodes (OLEDs). Over past decade, thermally activated delayed fluorescence (TADF) materials based on donor (D)/acceptor (A) combinations have been researched OLEDs in wide color gamut (RGB) regions. However, due strong intramolecular charge-transfer (CT) state, they exhibit broad with full-width-at-half maximum (FWHM) > 70 nm, which deviates from being detrimental achieving high purity future high-end display electronics such as high-definition TVs ultra-high-definition (UHDTVs). Recently, new development sub-class TADF emitters called multi-resonant (MR-TADF) boron/nitrogen atoms attracted much interest ultra-high definition OLEDs. Consequently, MR-TADF are appeal their potentiality promising candidates fabricating high-efficient numerous advantages photoluminescence quantum yield (PLQY), unprecedented purity, narrow bandwidth (FWHM ≤ 40 nm). Until now many developed ultra-gamut regions different design concepts. most MR-TADF-OLEDs showed ruthless external efficiency (EQE) roll-off characteristics at brightness. Such EQE were derived mainly low reverse intersystem crossing (kRISC) rate values. This feature article primarily focuses strategies improve kRISC some supportive including extending charge delocalization, heavy atom introduction, multi-donor/acceptor utilization, a hyperfluorescence system approach. Furthermore, outlook prospects developments skeletons described.
Language: Английский
Citations
77
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Nov. 9, 2023
Abstract Polymeric materials exhibiting room temperature phosphorescence (RTP) show a promising application potential. However, the conventional ways of preparing such are mainly focused on doping, which may suffer from phase separation, poor compatibility, and lack effective methods to promote intersystem crossing suppress nonradiative deactivation rates. Herein, we present an intrinsically polymeric RTP system producing long-lived phosphorescence, high quantum yields multiple colors by stepwise structural confinement tame triplet excitons. In this strategy, performance is improved in two aspects simultaneously: lifetime one polymer (9VA-B) increased more than 4 orders magnitude, maximum yield reached 16.04% halogen-free polymers. Moreover, crack detection realized penetrating steam through exposed humid surroundings as special quenching effect, information storage carried out employing Morse code variations lifetimes. This study provides different strategy for constructing toward targeted applications.
Language: Английский
Citations
72
Small Structures, Journal Year: 2023, Volume and Issue: 4(5)
Published: Feb. 2, 2023
As emerging carbon‐based nanomaterials, carbon dots (CDs) are widely studied with regard to their luminescent properties. CDs obtained by the bottom‐up method exhibit polymeric characteristics after crosslinking, polymerization, and incomplete carbonization processes, herein referred as carbonized polymer (CPDs). In recent years, large progress has been achieved on room‐temperature phosphorescence (RTP) properties of CPDs. The developments synthesis strategies for RTP CPD materials reviewed. However, less attention devoted influence structures materials. Polymer a common feature extensive key factors facilitating Herein, effects emission self‐protective matrix‐assisted discussed. It is considered that can effectively immobilize subluminophores protect triplet excited states facilitate crosslink‐enhanced (CEE) effect proposed further explain materials, which provide an effective strategy Benefiting from CEE effect, efficient be applications then briefly summarized.
Language: Английский
Citations
62
Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(11), P. 800 - 812
Published: Sept. 25, 2023
Language: Английский
Citations
61
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1945 - 1954
Published: Jan. 13, 2023
The design and regulation of multiple room-temperature phosphorescence (RTP) processes are formidably challenging due to the restrictions imposed by Kasha's rule. Here, we report a general principle for materials that show RTP processes, which is informed our study four compounds where there modulation linker hybridization between donor (D) acceptor (A) groups. Theoretical modeling photophysical experiments demonstrate can be achieved in sp3 C-linked D-A arrest intramolecular electronic communication two triplet states (T1H T1L) localized on or states, one delocalized across aggregated acceptors. However, sp2 counterparts, from locally excited T1 state observed because enhanced excitonic coupling molecular subunits. Single-crystal reduced density gradient analyses reveal influence packing coincident origin aggregate phosphorescence. These findings provide insights into higher-lying excited-state dynamics fundamental designing RTP.
Language: Английский
Citations
57
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Feb. 10, 2024
Abstract A strategy is pioneered for achieving high-temperature phosphorescence using planar rigid molecules as guests and polymers host matrix. The configuration can resist the thermal vibration of guest at high temperatures, rigidity matrix further enhances resistance guest. doped materials exhibit an afterglow 40 s 293 K, 20 373 6 413 a 1 433 K. experimental results indicate that rotational ability groups connected to gradually increases, performance decreases. In addition, utilizing property emit temperatures in smoke, attempt made use organic identify rescue workers trapped personnel fires.
Language: Английский
Citations
51
The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(7), P. 1794 - 1807
Published: Feb. 10, 2023
Small molecular host–guest doped materials exhibit superiority toward high-efficiency room-temperature phosphorescence (RTP) due to their structural design diversity and ease of preparation. Dynamic RTP display excellent characteristics, such as good reversibility, quick response, tunable luminescence ability, making them applicable various cutting-edge technologies. Herein, we summarize the advances in dynamic that respond external internal stimuli present some insights into strategies underlying mechanisms. Subsequently, specific viewpoints are described regarding this promising field for development materials. This Perspective is highly beneficial future intelligent applications systems.
Language: Английский
Citations
50
Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(24), P. 13966 - 14037
Published: Nov. 22, 2023
Phosphorescence, characterized by luminescent lifetimes significantly longer than that of biological autofluorescence under ambient environment, is great value for biomedical applications. Academic evidence fluorescence imaging indicates virtually all metrics (sensitivity, resolution, and penetration depths) are improved when progressing into wavelength regions, especially the recently reported second near-infrared (NIR-II, 1000–1700 nm) window. Although emission probes does matter, it not clear whether guideline "the wavelength, better effect" still suitable developing phosphorescent probes. For tissue-specific bioimaging, long-lived probes, even if they emit visible phosphorescence, enable accurate visualization large deep tissues. studies dealing with bioimaging tiny architectures or dynamic physiopathological activities, prerequisite rigorous planning long-wavelength being aware cooperative contribution long wavelengths improving spatiotemporal depth, sensitivity bioimaging. In this Review, emerging molecular engineering methods room-temperature phosphorescence discussed through lens photophysical mechanisms. We highlight roles from to NIR-II windows toward bioapplications. To appreciate such advances, challenges prospects in rapidly growing described.
Language: Английский
Citations
48
Applied Physics Reviews, Journal Year: 2023, Volume and Issue: 10(2)
Published: May 31, 2023
Multicolor organic room temperature phosphorescence (RTP) has garnered wide research attention due to the long luminescence lifetime and tunable excited state properties, which show great potential in displays, anticounterfeiting, data encryption, sensing. However, because of sensitivity triplet excitons materials, emitting level compounds is hard manipulate. Therefore, realizing multicolor RTP materials still a huge challenge. In this review, we summarize recent advances including underlying mechanisms, design principles phosphorescence, detailed photophysical behaviors, their applications. The last part presents existing challenges future perspectives, such as expanding color gamut, enriching stimuli-responsive improving performance, exploring more advanced This review will provide inspiration guidelines for constructing applications electronics, bioelectronics, flexible so on.
Language: Английский
Citations
44