An increasing number of dental practices are upgrading from film radiography to digital radiography, for reasons that include faster image processing, easier image access, better patient education, enhanced data storage, and improved office productivity. Most practices that have converted to digital technology use rigid, or direct, sensors. Another digital option is flexible phosphor sensors, also called indirect sensors or phosphor storage plates (PSPs). Flexible phosphor sensors can be advantageous for use with certain patients who may be averse to direct sensors, and they can deliver a larger image area. Additionally, sensor cost for replacement PSPs is considerably lower than for hard sensors. As such, flexible phosphor sensors appear to be a viable supplement or option to direct sensors.
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Molecules
December 2024
Department of Science and Humanities, School of Engineering and Technology, CHRIST University, Bangalore 560029, Karnataka, India.
Using the solid-state reaction technique, varied YSiO phosphors activated by europium (Eu) ions at varied concentrations were made at calcination temperatures of 1000 °C and 1250 °C during sintering in an air environment. The XRD technique identified the monoclinic structure, and the FTIR technique was used to analyze the generated phosphors. Photoluminescence emission and excitation patterns were measured using varying concentrations of Eu ions.
View Article and Find Full Text PDFNat Commun
January 2025
Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Department of Chemistry, Tsinghua University, Beijing, China.
The further success of OLED beyond conventional low-luminance display applications has been hampered by the low power efficiency (PE) at high luminance. Here, we demonstrate the strategic implementation of an exceptionally high-PE, high-luminance OLED using a phosphor-assisted thermally-activated-delayed-fluorescence (TADF)-sensitized narrowband emission. On the basis of a TADF sensitizing-host possessing a fast reverse intersystem crossing, an anti-aggregation-caused-quenching character and a good bipolar charge-transporting ability, this design achieves not only a 100% exciton radiative consumption with decay times mainly in the sub-microsecond regime to mitigate exciton annihilations for nearly roll-off-free external quantum efficiency, but also narrowband emission with both small energetic loss during energy transfer and resistive loss with increasing luminance.
View Article and Find Full Text PDFMater Horiz
December 2024
Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China.
Despite recent advancements in organic phosphors, the synthesis of monodisperse afterglow microparticles (MPs) suitable for creating photonic crystals remains challenging. The SiO matrix is an attractive host material for activating the long-lived emissions of doped molecules due to several factors, including its cross-linked polymer-like structure, abundance of -OH groups, robustness, and presence of numerous emitter defects. However, the Stöber method struggles to produce monodisperse molecule-doped SiO MPs due to the complexity of the system.
View Article and Find Full Text PDFAdv Mater
December 2024
Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China.
Tuning the afterglow of polymeric phosphors is critical for advancing their use in optical data storage and display technologies. Despite advancements in polymer matrix design and dopant engineering, achieving dynamic control over afterglow intensity remains a significant challenge. In this study, a novel approach is introduced for dynamically tuning the afterglow of polymeric phosphors by integrating them into an inverse opal photonic structure.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Department of Applied Physics, Hebei University of Technology, Tianjin 300401, PR China.
Anti-counterfeiting technology plays an indispensable role in the high-tech field and various critical application areas. However, traditional anti-counterfeiting approaches currently in widespread use are too simplistic and easily replicated or forged, while advanced technologies with multiple anti-counterfeiting functions remain in the developmental stage. This study presents a novel multiple anti-counterfeiting technique.
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