Energy transfer-based X-ray imaging scintillators

Chem, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

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Multi‐π‐Stacked Through‐Space Charge‐Transfer Emitters with Accelerated Radiative Decay for High‐Efficiency Organic Light‐Emitting Diodes with Suppressed Efficiency Roll‐Offs

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Through‐space charge‐transfer (TSCT) thermally‐activated delayed fluorescence (TADF) emitters have been extensively explored for organic light‐emitting diodes (OLEDs), but their low radiative decay rates ( k r,s ) remained a formidable obstacle to enhancement of luminescent efficiency (Ф PL and suppression roll‐off the OLED. Here, multi‐π‐stacked TSCT‐TADF with accelerated are developed 3D [fixed acceptor]/donor/[fixed acceptor] structure formed on two individual fluorene bridges. Single‐crystal structures theoretical calculations reveal cis or trans ‐configurations acceptors around central donor double TSCT channels in emitter. In doped films, show green‐blue TADF high up 1.1 × 10 7 s −1 near‐unity Ф , which notably improved compared single‐π‐stacked analog = 2.1 6 0.89). OLEDs based external quantum efficiencies (EQEs) 26.2% EQEs at 1000 cd m −2 (EQE remain 23.4%, superior over device max /EQE 20%/15.6%). A narrowband blue‐green OLED one emitter as sensitizer shows EQE 37.6%/27.7%. The work demonstrates great potential enhancing high‐efficiency roll‐offs.

Language: Английский

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Near-infrared organic scintillators for efficient X-ray imaging via singlet and triplet to doublet energy transfer

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Language: Английский

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Two-coordinate copper(I) complexes enable efficient X-ray scintillation and imaging

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Language: Английский

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Advances and Challenges in X-ray-Excited Scintillators and Their Biomedical Applications: Current Insights and Future Directions

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

This review explores the pivotal role of scintillators in biomedical applications, with a particular emphasis on their utilization context X-ray excitation. It commences an in-depth analysis two predominant categories scintillators: inorganic and organic, meticulously delineating distinctive properties respective applications. The discourse subsequently advances to explore critical applications X-ray-excited (XESs), underscoring significant advancements medical imaging, radiation detection, dosimetry. Moreover, identifies prevailing challenges limitations deployment these for purposes, thereby establishing robust foundation ongoing research endeavors. outlines potential directions, advocating interdisciplinary collaborations overcome existing barriers. By synthesizing current knowledge identifying areas future investigation, this aims guide researchers enhancing efficacy application science.

Language: Английский

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Scintillators with aggregation-induced emission

Chem, Journal Year: 2025, Volume and Issue: unknown, P. 102534 - 102534

Published: April 1, 2025

Language: Английский

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Low-dimensional strategy of ultra-fast high-efficiency scintillators for X-ray imaging under indoor light interference

CrystEngComm, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

High quality Bmpip 2 SnBr 4 :12% Cu + single crystal scintillator was successfully prepared by space-limited slow cooling crystallization in aqueous solution. The optimized scintillators present ultrafast lifetime and excellent light yield.

Language: Английский

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Fundamental Processes and Recent Development of Organic Scintillators

Journal of Luminescence, Journal Year: 2024, Volume and Issue: unknown, P. 121008 - 121008

Published: Nov. 1, 2024

Language: Английский

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Thermally activated delayed fluorophore and plasmonic structures integrated with perovskites for X-ray scintillation and imaging

Matter, Journal Year: 2024, Volume and Issue: 7(10), P. 3256 - 3289

Published: Oct. 1, 2024

Language: Английский

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Thermally Activated Delayed Fluorescence Sensitizer with Through‐Space Charge Transfer Manipulated by Atom Distribution for Solution‐Processed Deep‐Blue Multi‐Resonance OLEDs

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Abstract Organic light‐emitting diodes (OLEDs) employing multi‐resonance (MR) emitters have attracted much attention due to their high luminescent efficiency and color purity, however, the development of deep‐blue OLEDs is hindered by lack suitable sensitizers. Here a novel design strategy reported for thermally activated delayed fluorescence sensitizer with reverse intersystem crossing (k RISC ) radiative transition R rate regulating atom distribution spatially‐aligned carbazole donor/diphenylpyrimidine acceptor structure manipulate through‐space charge transfer (CT) process. It found that diphenylpyrimidine 1,3‐position nitrogen atoms un‐conjugated bridging phenyl moiety conjugation node pyrimidine, while 1,5‐position conjugated through site, opening through‐bond CT pathway via besides from spatial donor‐acceptor interactions. As result, exhibits enhanced oscillator strength 3.5 folds accelerated k 3.57 × 10 7 s −1 , keeping 4.03 6 singlet (S 1 state (2.88 eV). Solution‐processed using emitter exhibit efficient narrowband electroluminescence CIE coordinates (0.14, 0.13) EQE max 15.6%, representing state‐of‐the‐art device performance solution

Language: Английский

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