Recent Advances on Host–Guest Material Systems toward Organic Room Temperature Phosphorescence

Small, Journal Year: 2021, Volume and Issue: 18(1)

Published: Nov. 1, 2021

Abstract The design and characterization of purely organic room‐temperature phosphorescent (RTP) materials for optoelectronic applications is currently the focus research in field electronics. Particularly, with merits preparation controllability modulation flexibility, host–guest material systems are encouraging candidates that can prepare high‐performance RTP materials. By regulating interaction between host guest molecules, it effectively control quantum efficiency, luminescent lifetime, color materials, even produce emission stimuli‐responsive features, holding tremendous potential diverse such as encryption anti‐counterfeiting, light‐emitting diodes, sensing, optical recording, etc. Here a roundup rapid achievement construction strategies, molecule systems, diversity outlined. Intrinsic correlations molecular properties survey recent significant advances development divided into three including rigid matrix, exciplex, sensitization presented. Providing an insightful understanding offering promising platform high throughput screening inherent advantages simple preparation, low‐cost, versatile resource, controllably modulated wide range intended.

Language: Английский

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Stimulus-Responsive Room Temperature Phosphorescence Materials: Internal Mechanism, Design Strategy, and Potential Application

Accounts of Materials Research, Journal Year: 2021, Volume and Issue: 2(8), P. 644 - 654

Published: July 26, 2021

ConspectusRoom temperature phosphorescence (RTP) materials, which could respond to external stimuli, such as force, heat, light, electric filed, etc., have drawn increasing attention for their broad application prospects, especially in the fields of anticounterfeiting, sensors, data storage, and so on. In comparison with traditional fluorescence ones, RTP materials show much longer emission lifetimes, can be even caught by naked eye. Thus, change lifetime under an stimulus also a potential monitoring parameter, addition color intensity. other words, number visual parameters increase from two three would greatly facilitate practical applications. Until now, been typically limited metal-containing inorganic particularly rare-earth phosphors. Their emissions are governed slow liberation trapped charge carriers isolated traps impurities, defects, or ions through thermal stimulation low luminescence efficiency. However, these suffer some intrinsic disadvantages, including high cost, toxicity, instability aqueous environments. order solve problems, purely organic should good choice. kinds really scarce ones response characteristic.To develop effect, we scientists tried lot. Luckily, progresses made. this Account, present our recent progress on stimulus-responsive room mainly focusing internal mechanism First, fundamental knowledge is described illustrate importance main principles effect. Then, typical based different mechanisms discussed. Mainly, were introduced, namely, single-component multicomponent ones. Correspondingly, dynamic property occurred distinct mechanisms. For changes molecular structure, packing, conformation, played significant role corresponding As changed oxygen concentration matrix intermolecular distance between components found more during process. Accordingly, applications explored processes. With classification mechanisms, design strategy well proposed, thus guiding further development research field.

Language: Английский

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On-demand modulating afterglow color of water-soluble polymers through phosphorescence FRET for multicolor security printing

Science Advances, Journal Year: 2022, Volume and Issue: 8(15)

Published: April 15, 2022

Developing full-color organic ultralong room temperature phosphorescence (OURTP) materials with continuously variable afterglow emission is of considerable practical importance in diverse optoelectronic applications but remains a formidable challenge. Here, we present an effective strategy for on-demand engineering color water-soluble polymeric systems via efficient Förster resonance energy transfer. Using blue emitting polymer as host and series fluorescent emitters varied emissive colors guests, rationally modulated, conferring the ranging from to red even white lifetimes up 4.2 s photoluminescence quantum yields 36%.These multicolor-emitting can function OURTP security inks, multilevel information encryption was successfully established by RGB-based multicolor printing. These results important guidance developing high-performance polymers tuning ability remarkable applications.

Language: Английский

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Progress in the development of the display performance of AR, VR, QLED and OLED devices in recent years

Journal of Information Display, Journal Year: 2022, Volume and Issue: 23(1), P. 1 - 17

Published: Jan. 2, 2022

The remarkable progress of virtual reality, augmented quantum dot light-emitting diode, and organic diode as next-generation displays has overcome the leadership liquid crystal display during last two years. This paper discusses key technological advancements performance these new-generation devices.

Language: Английский

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An Asymmetric Hygroscopic Structure for Moisture‐Driven Hygro‐Ionic Electricity Generation and Storage

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: March 26, 2022

The interactions between moisture and materials give rise to the possibility of moisture-driven energy generation (MEG). Current MEG devices only establish this interaction during water sorption in specific configurations, conversion is eventually ceased by saturated uptake. This paper reports an asymmetric hygroscopic structure (AHS) that simultaneously achieves harvesting storage from absorption. AHS constructed deposition a ionic hydrogel over layer functionalized carbon. Water absorbed air creates wet-dry asymmetry across hence in-plane electric field. can be perpetually maintained even after triggers spontaneous development electrical double (EDL) carbon surface, which termed hygro-ionic process, accounting for capacitive properties AHS. A peak power density 70 µW cm-3 was realized geometry optimization. shows ability recharged either itself owing self-regeneration effect or via external means, allows it serve as device. In addition insights into moisture-material interaction, AHSs further potential electronics powering assembled devices.

Language: Английский

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Enabling robust and hour-level organic long persistent luminescence from carbon dots by covalent fixation

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: March 29, 2022

The first carbon dot (CD)-based organic long persistent luminescence (OLPL) system exhibiting more than 1 h of duration was developed. In contrast to the established OLPL systems, herein, reported CDs-based (named m-CDs@CA) can be facilely and effectively fabricated using a household microwave oven, impressively, its LPL observed under ambient conditions even in aqueous media. XRD TEM characterizations, afterglow decay, time-resolved spectroscopy, ESR analysis were performed, showing successful composition CDs CA, formation exciplexes long-lived charged-separated states. Further studies suggest that production covalent bonds between CA plays pivotal roles activating preventing quenching from oxygen water. To best our knowledge, this is very rare example an exhibits hour-level conditions. Finally, applications m-CDs@CA glow-in-the-dark paints for emergency signs multicolored luminous pearls preliminarily demonstrated. This work may provide new insights development rare-earth-free robust materials.

Language: Английский

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Clusterization-Triggered Color-Tunable Room-Temperature Phosphorescence from 1,4-Dihydropyridine-Based Polymers

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 144(3), P. 1361 - 1369

Published: Dec. 23, 2021

A series of poly(1,4-dihydropyridine)s (PDHPs) were successfully synthesized via one-pot metal-free multicomponent polymerization diacetylenic esters, benzaldehyde, and aniline derivatives. These PDHPs without traditional luminescent units endowed with tunable triplet energy levels by through-space conjugation from the formation different cluster sizes. The large compact clusters can effectively extend phosphorescence wavelength. excitons be stabilized using benzophenone as a rigid matrix to achieve room-temperature phosphorescence. nonconjugated polymeric show emission up 645 nm. combination static dynamic laser light scattering was conducted for insight into structural information on formed in host melt. Moreover, both fluorescence easily tuned variation excitation wavelength, concentration, molecular weight guest polymers. This work provides unique designing host-guest systems new strategy development long wavelength materials.

Language: Английский

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Molecular physics of persistent room temperature phosphorescence and long-lived triplet excitons

Applied Physics Reviews, Journal Year: 2022, Volume and Issue: 9(1)

Published: Jan. 18, 2022

Persistent room temperature phosphorescence (pRTP) is important to high-resolution imaging independent of autofluorescence and the scattering excitation light for security applications. Although efficient bright pRTP crucial applications, photophysical processes from triple states heavy-atom-free chromophores have been explained by making many assumptions that are potentially based on incorrect explanations. This often confuses researchers in their efforts control enhance characteristics. paper introduces recent advances our understanding lowest triplet excited state statistical evidence experimental theoretical viewpoints. After introduction two showing persistent RT emissions characteristics emissions, physical parameters relating appropriate techniques measuring explained. For molecularly dispersed heavy-metal-free a solid state, understandings verified correlations optically estimated viewpoints summarized. Using insights obtained chromophores, uncertainties regarding aggregated discussed. highlighting recently developed materials pRTP, potential advantages over previous discussed considering demonstrations emitters. review quantitatively summarizes relationship between molecular backbone guides reader appropriately design with long-lived excitons promising

Language: Английский

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Phosphorescence resonance energy transfer from purely organic supramolecular assembly

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(12), P. 854 - 874

Published: Nov. 22, 2023

Language: Английский

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Achieving purely organic room temperature phosphorescence in aqueous solution

Aggregate, Journal Year: 2022, Volume and Issue: 4(1)

Published: July 12, 2022

Abstract Purely organic room temperature phosphorescence (RTP) materials have aroused increasing interests in recent years and been widely applied anti‐counterfeiting, biological imaging, sensing, etc. Currently, these can be efficiently developed crystalline states amorphous polymer‐doped systems. However, achieving RTP solution, especially water is still a formidable challenge. Recently, reports on aqueous phase some feasible design strategies proposed; however, related investigations are limited there lack of systematic reviews. Therefore, we summarized the cases emission with primarily focusing properties efficient (e.g., forming nanoparticles from phosphorescent molecules macrocyclic supramolecular assembly). Moreover, promising applications bio‐imaging sensing were discussed. Some detailed perspectives concerning application provided hope to provide inspiration for future development RTP.

Language: Английский

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