Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(31), P. 11995 - 12003
Published: Jan. 1, 2024
Monomeric and dimeric Yb species form in Yb-doped cesium lead halide perovskites. At low concentration monomers create a quantum-cutting efficiency loss channel, while diffusion-limited quenching of excited states dominates at high concentration.
Language: Английский
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)
Published: May 22, 2024
Abstract The double perovskite material of Cs 2 NaRECl 6 ‐type, utilizing rare‐earth (RE) ions as trivalent element, has attracted widespread interest due to its unique optoelectronic properties and wide range applications. It displays rich optical properties, including visible infrared light emission through down‐shifting, well up‐conversion radiation‐induced emission. These exceptional make it a promising for devices such detectors, light‐emitting diodes, lasers energy storage batteries but also show advantages in anti‐counterfeiting technology imaging. In this article, the latest progress is reported challenges crystal structure, preparation, performance, various applications lead‐free halide (HLDPs) compounds. This outline prospective research directions existing materials, with aim facilitating discovery new HLDPs materials.
Language: Английский
Citations
23
Advanced Science, Journal Year: 2023, Volume and Issue: 11(9)
Published: Dec. 21, 2023
Abstract Revealing the energy transfer (ET) process from excitons to rare earth ions in halide perovskites has great guiding value for designing optoelectronic materials. Here, multiple ET channels multi‐exciton emissive Sb 3+ /Nd co‐doped Cs 2 ZrCl 6 are explored comprehend processes. Förster–Dexter theory reveals that sensitizer concentration rather than overlap integral of spectra plays leading function comparison efficiency among host self‐trapped (STEs) and dopant triplet STEs Nd ions. Besides, enables varied color delivery potential as anti‐counterfeiting material. Under X‐ray irradiation, presents a high light yield ≈13300 photons MeV −1 promising imaging ability. This work provides new insight investigating processes potentiality fields imaging.
Language: Английский
Citations
23
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown
Published: June 9, 2024
Abstract Rare‐earth based double perovskites (DPs) have attracted much attention due to stable, efficient, and unique luminescence, wide applications in many optoelectronic fields. However, their weak near‐infrared (NIR) emission poor anti‐thermal quenching severely limit the further applications. Herein, Sb 3+ ‐doped Cs 2 KYbCl 6 DP with cyan self‐trapped exciton (STE) NIR is prepared by a solvothermal method, separate photoluminescence quantum yields from STE reached ≈26.1% 43.8%, respectively. More importantly, not only contributes absorption energy transfer but also helps establish an effective thermally enhanced channel through self‐trapping state, resulting superior resistance. The thermal sensitivity of luminescence intensity ratio (LIR) I 1010 nm / 505 ( PL) time‐resolved temperature sensor reach 21.4 13.6% K −1 , respectively, which are ahead most sensing materials. Furthermore, it found that material exhibited advanced multifunctional LED lighting, flexible luminescent thin film, imaging. This work provides in‐depth understanding on photophysical mechanisms rare‐earth materials references for designing high‐performance
Language: Английский
Citations
10
Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(23), P. 10481 - 10489
Published: May 24, 2024
Achieving high-efficiency tunable emission in a single phosphor remains significant challenge. Herein, we report series of Sb3+-doped all-inorganic double perovskites, Sb3+:Cs2NaScCl6, with efficient excitation-dependent emission. In 0.5%Sb3+:Cs2NaScCl6, strong blue high photoluminescence quantum yield (PLQY) 85% is obtained under 265 nm light irradiation, which turns into bright neutral white PLQY 56% when excited at 303 nm. Spectroscopic and computational investigations were performed to reveal the mechanism this Sb3+ doping induces two different excitation channels: internal transition Sb3+: 5s2 → 5s5p electron transfer 5s Sc3+ 3d. The former one generates ions, can undergo energy populate host self-trapped exciton (STE) state, yielding enhanced latter leads formation new STE state hole localized on delocalized nearest Sc3+, accounts for newly exhibited low-energy difference pathways emitting states results highly emission, making doped systems promising anticounterfeiting materials.
Language: Английский
Citations
7
Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(23), P. 10756 - 10766
Published: May 29, 2024
The lead-free halide perovskites possess nontoxicity and excellent chemical stability, whereas relatively weak luminescence intensity limits their potential in practical applications. Therefore, strengthening the expanding application fields are urgent tasks for development of perovskites. In this paper, antimony-doped Cs2NaScCl6 crystals synthesized by a solvothermal method emit bright, deep blue photoluminescence at 447 nm. (PL), excitation (PLE), absorption spectra demonstrate that Sb3+ doping effectively activate intrinsic "dark self-trapped exciton (STE)," leading to an impressive quantum yield (PLQY) value 78.31% 1% doping. Furthermore, remains above 92% compared with fresh sample without secondary phases detected even after 90 days under environmental conditions. To expand emission spectra, rare-earth Sm3+ is further incorporated into Cs2NaScCl6:1% crystals. results show Sb ions not only enhance STE but also serve as sensitizers boost red-light Sm3+, significant 500-fold increase red intensity. Finally, PLQY reaches stunning 86.78%. These findings provide valuable insights design ion-doped double perovskites, broadening various optoelectronic devices.
Language: Английский
Citations
6
Ceramics International, Journal Year: 2024, Volume and Issue: 50(21), P. 41802 - 41809
Published: Aug. 3, 2024
Language: Английский
Citations
5
Nanoscale, Journal Year: 2024, Volume and Issue: 16(14), P. 6837 - 6852
Published: Jan. 1, 2024
This review summarized the optical performances of RE doped/containing lead-free DPs, which involve extension luminescence range, improvement PLQY, realization multi-mode excitation and multi-color emission.
Language: Английский
Citations
4
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(30)
Published: Aug. 13, 2024
Abstract Recently, all‐inorganic halide double perovskites (DPs) with a chemical formula of Cs 2 B I III X 6 have been emerging as shinning star to be used in modern optoelectronic devices, due their unique advantages such environmentally friendly, high absorption coefficient, low trap densities, tunable bandgap, variable constituent elements and valences states through or sites engineering. In this review, first, the impact cation doping on electronic structure optical properties DPs are systematically overviewed, which cover several key issues including interconversion between direct indirect band gaps, enhancement light absorption, promotion exciton localization, elucidation energy transfer mechanisms, regulation defect density improvement both stability luminescence efficiency. Subsequently, state‐of‐the‐art research activities regarding interesting device applications discussed, light‐emitting diodes, anticounterfeiting encryption, X‐ray scintillators, thermometry. Finally, existing difficulties, prospects, directions field proposed.
Language: Английский
Citations
4
Ceramics International, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Citations
0
Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116308 - 116308
Published: Feb. 1, 2025
Language: Английский
Citations
0