Ultralow‐loss Optical Waveguides through Balancing Deep‐Blue TADF and Orange Room Temperature Phosphorescence in Hybrid Antimony Halide Microstructures

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 14, 2023

Harnessing the potential of thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is crucial for developing light-emitting diodes (LEDs), lasers, sensors, many others. However, effective strategies in this domain are still relatively scarce. This study presents a new approach to achieving highly efficient deep-blue TADF (with PLQY 25 %) low-energy orange RTP 90 through fabrication lead-free hybrid halides. class monomeric dimeric 0D antimony halides can be facilely synthesized using bottom-up solution process, requiring only few seconds minutes, which offer exceptional stability nontoxicity. By leveraging adaptable molecular arrangement crystal packing modes, demonstrate ability self-assemble into regular 1D microrod 2D microplate morphologies. self-assembly facilitated by multiple non-covalent interactions between inorganic cores organic shells. Notably, these microstructures exhibit outstanding polarized luminescence function as low-dimensional optical waveguides with remarkably low optical-loss coefficients. Therefore, work not pioneering demonstration halides, but also introduces micro/nanostructures that hold promising applications white LEDs photonic systems.

Language: Английский

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Oriented Self-Assembly of Hierarchical Branch Organic Crystals for Asymmetric Photonics

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(16), P. 9285 - 9291

Published: April 11, 2023

Organic hierarchical branch micro/nanostructures constituted by single crystals with inherent multichannel characteristics exhibit superior potential in regulating photon transmission for photonic circuits. However, organic precise positions are extremely difficult to achieve due the randomness of nucleation process. Herein, taking advantage dislocation stress field–impurity interaction that solute molecules deposit preferentially along line, twinning deformation was introduced into microcrystals induce oriented sites, and ultimately microstructures controllable sites were fabricated. The growth mechanism these an angle 140° between trunk is attributed low lattice mismatching ratio (η) 4.8%. These as-prepared asymmetrical optical waveguide have been demonstrated as logic gate multiple input/out channels, which provides a route command offers applications optoelectronics at micro/nanoscale.

Language: Английский

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Molecular Electronics: From Nanostructure Assembly to Device Integration

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(12), P. 7885 - 7904

Published: March 14, 2024

Integrated electronics and optoelectronics based on organic semiconductors have attracted considerable interest in displays, photovoltaics, biosensing owing to their designable electronic properties, solution processability, flexibility. Miniaturization integration of devices are growing trends molecular for practical applications, which requires large-scale versatile assembly strategies patterning micro/nano-structures with simultaneously long-range order, pure orientation, high resolution. Although various methods been developed past decades, still needs a platform avoid defects disorders due weak intermolecular interactions materials. In this perspective, roadmap technologies recent three decades is provided review the history electronics. First, we highlight importance long-range-ordered packing achieving exotic photophysical properties. Second, classify through control nucleation crystallographic evaluate them factors resolution, crystallinity, scalability, versatility. Third, discuss multifunctional integrated circuits field-effect transistors (OFETs) photodetectors. Finally, explore future research directions outlines need further development electronics, including doped heterostructures, biological interfaces logics complementary FETs.

Language: Английский

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Recent Progress of Novel Organic Near‐Infrared‐Emitting Materials

Small Science, Journal Year: 2022, Volume and Issue: 2(8)

Published: July 13, 2022

Organic near‐infrared (NIR) emissive materials integrating the intrinsic NIR light advantages and organic semiconductor characters have generated immense scientific interest in fundamental science practical application, including optical communications, night vision, surveillance, biomedical applications. Nevertheless, energy gap law engenders a huge challenge to simultaneously meet longer emission wavelength higher luminescence efficiency for emitters. Herein, it is suggested that purposefully molecular design crystal engineering novel are urgently studied explored. recent advances materials, mainly focusing on hybridized local charge transfer (HLCT) compounds, thermally activated delayed fluorescence (TADF) emitters, CT cocrystals, neutral π‐radicals, excited‐state intramolecular proton (ESIPT)‐active summarized. It hoped this perspective can afford new insight into fine synthesis of desired

Language: Английский

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Thermochromic Ni(II) Organometallics With High Optical Transparency and Low Phase‐Transition Temperature for Energy‐Saving Smart Windows

Small, Journal Year: 2023, Volume and Issue: 19(22)

Published: March 6, 2023

Thermochromic smart windows with rational modulation in indoor temperature and brightness draw considerable interest reducing building energy consumption, which remains a huge challenge to meet the comfortable responsive wide transmittance range from visible near-infrared (NIR) light for their practical application. Herein, novel thermochromic Ni(II) organometallic of [(C2 H5 )2 NH2 ]2 NiCl4 is rationally designed synthesized via an inexpensive mechanochemistry method, processes low phase-transition 46.3 °C reversible color evolution transparent blue tunable 90.5% 72.1%. Furthermore, cesium tungsten bronze (CWO) antimony tin oxide (ATO) excellent NIR absorption 750-1500 1500-2600 nm are introduced -based windows, realizing broadband sunlight 27% more than 90% shielding ability. Impressively, these demonstrate stable cycles at room temperature. Compared conventional field tests, can significantly reduce by 16.1 °C, promising next-generation energy-saving buildings.

Language: Английский

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Ultrahighly Efficient Narrowband Red Luminescence of Uniquely Distorted Mn⁴⁺ Octahedron in the Feldspar‐Type LED Phosphor

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 17(8)

Published: March 6, 2023

Abstract The mineral structure‐inspired discovery of red phosphors has become a research hotspot that can help compensate for the missing components in cold white light‐emitting diodes (WLEDs). Herein, first feldspar‐type structure is utilized to develop narrowband red‐emitting CaAl 2 Si O 8 :Mn 4+ /Mn , Mg 2+ phosphors. Rietveld refinement results confirm Mn occupation distorted [Ca1O 6 ] octahedron, resulting strong nephelauxetic effect, and thus exhibits bright luminescence with narrow full width at half maximum (43 nm). Compared fluorescence intensity further enhanced by up 210% owing decreasing nonradiative decay rate from E g excited state, which weakens concentration quenching effect energy migration along adjacently aggregated . shows preferable thermal stability an ultrahigh quantum efficiency (90.3%), surpassing other current ‐doped oxide UCr 4 C ‐type nitride A fabricated prototype WLED obtains ideal warm light low correlated color temperature (3081 K) wide gamut covering 112% National Television System Committee standard. Guided natural mineral‐type structural prototypes, this study demonstrates possibility designing uniquely local achieve superior performance WLEDs.

Language: Английский

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Recent advances in organic donor–acceptor cocrystals: design, synthetic approaches, and optical applications

CrystEngComm, Journal Year: 2023, Volume and Issue: 25(21), P. 3126 - 3141

Published: Jan. 1, 2023

The recent progress in optical applications of organic donor–acceptor co-crystals is reviewed terms material design, synthetic approach and future perspectives.

Language: Английский

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Molecular and Aggregate Synergistic Engineering of Aggregation-Induced Emission Luminogens to Manipulate Optical/Electronic Properties for Efficient and Diversified Functions

ACS Nano, Journal Year: 2023, Volume and Issue: 17(9), P. 8782 - 8795

Published: April 19, 2023

The optical/electronic properties of organic luminescent materials can be regulated by molecular structure modification, which not only requires sophisticated and time-consuming synthesis but also is unable to accurately afford the optical in aggregate state. Herein, a facile strategy synergistic engineering proposed manipulate luminogen, ACIK, solid state for efficient diversified functions. ACIK facilely synthesized exhibits three polymorphic states (ACIK-Y, ACIK-R, ACIK-N) with large emission difference 102 nm from yellow near-infrared (NIR). Their structure-property relationships were investigated crystallographic analyses computational studies. ACIK-Y, most twisted structure, an intriguing color-tuned fluorescence between NIR response multiple stimuli. Shuttle-like ACIK-R microcrystals exhibit waveguide property low loss coefficient 19 dB mm-1. dots display bright NIR-I emission, Stokes shift, strong NIR-II two-photon absorption. show specific lipid droplets-targeting capability successfully applied imaging mouse brain vasculature deep penetration high spatial resolution. This study will inspire more insights developing advanced based on single chromophore practical applications.

Language: Английский

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Pyrene-based cocrystals for regulation of extensive emission across visible to near-infrared II range

Science China Materials, Journal Year: 2024, Volume and Issue: 67(3), P. 946 - 953

Published: Feb. 5, 2024

Language: Английский

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Organic Cocrystal Alloys: From Three Primary Colors to Continuously Tunable Emission and Applications on Optical Waveguides and Displays

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: March 29, 2024

Multicolor luminescence of organic fluorescent materials is an essential part lighting and optical communication. However, the conventional construction a multicolor system based on integrating multiple single emission band remains complicated to be improved. Herein, alloys (OAs) capable full-color are synthesized charge transfer (CT) cocrystals. By adjusting molar ratio electron donors, color OAs can conveniently continuously regulated in wide visible range from blue (CIE: 0.187, 0.277), green 0.301, 0.550), red 0.561, 0.435). The show analogous 1D morphology with smooth surface, allowing for waveguides low optical-loss coefficient. Impressively, displays easily achieved through continuous emission, which shows promising applications field display promotes development photonics.

Language: Английский

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