Journal of Material Science and Technology, Год журнала: 2024, Номер unknown
Опубликована: Дек. 1, 2024
Язык: Английский
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 10, 2025
Abstract Recently, lead‐free double perovskites have gained much attention for their superior optoelectronic properties. However, realizing efficient white light and near‐infrared (NIR) emission, as well bright radioluminescence (RL) in a single compound has not yet been reported. Herein, Bi 3+ /Mo 4+ ‐codoped Cs 2 Ag 0.6 Na 0.4 InCl 6 perovskite is synthesized by hydrothermal reaction. Under photoexcitation, the codoped exhibits highly broadband warm‐white emission (610 nm) NIR (930 nm), which can be attributed to self‐trapped exciton of d–d transition Mo , respectively. Interestingly, also emits strong with yield 25100 photons per MeV under X‐ray irradiation. Based on /PDMS flexible film, its applications emitting diodes (WLED), source, scintillator are demonstrated, respectively, all exhibit remarkable Finally, as‐fabricated devices light, NIR, imaging further demonstrated pixel‐level image fusion realized without pixel mismatch complex processing. Therefore, internal information capsule wrapped centrifuge tube iron wire successfully through fusion.
Язык: Английский
Процитировано
1
Scientific Reports, Год журнала: 2025, Номер 15(1)
Опубликована: Апрель 15, 2025
Abstract This study provides a comprehensive analysis of the electronic structure, reflectivity, and luminescent spectra organic-inorganic, metal-halide MAPbCl 3 perovskite, which has considerable potential for various optoelectronic applications. Using density functional theory (DFT) calculations, we investigated structure interpreted key features its reflectivity across wide energy range from to 10 eV. The reveal prominent excitonic at 3.22 eV near absorption edge additional optical transitions higher energies, highlighting material’s intricate structure. Furthermore, examined temperature dependence radiative decay dynamics under high-energy radiation through X-ray luminescence time measurements. We observe emission free bound excitons with an exceptionally short (≤ 1 ns) significant thermal quenching low temperatures (100 K) in 385–430 nm range. These findings underline importance continued exploration properties material enhance performance practical
Язык: Английский
Процитировано
0
Applied Physics Letters, Год журнала: 2025, Номер 126(8)
Опубликована: Фев. 1, 2025
Metal halide perovskites are the most promising candidates in field of X-ray detection and imaging. However, self-absorption toxicity lead-based severely limit their widespread application. Herein, zirconium-based have attracted much attention due to excellent stability, low toxicity, suitable bandgap, self-free absorption, wide emission spectrum. In this work, (C8H20N)2ZrCl6 single crystals synthesized by evaporation crystallization, which presents a large Stokes shift 203 nm, high PLQY 80.77%, good stability over 180 days. Then, assembled (C8H20N)2ZrCl6@PDMS films show flexibility (bending stretching) spatial resolution 5.8 lp/mm. Thus, work not only provides route explore lead-free metal with broadband but also demonstrates flexible scintillators for scintillation
Язык: Английский
Процитировано
0
Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180365 - 180365
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Chem, Год журнала: 2025, Номер unknown, С. 102534 - 102534
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Laser & Photonics Review, Год журнала: 2025, Номер unknown
Опубликована: Апрель 25, 2025
Abstract Cs 3 Cu 2 Cl 5 nanocrystals (NCs) have emerged as promising optoelectronic materials owing to their efficient self‐trapped exciton (STE) emission. However, limited environmental stability has significantly constrained application in light‐emitting diodes (LEDs). In this work, a facile ambient‐air synthesis strategy is developed for Mg ⁺‐doped NCs that simultaneously addresses both and emission efficiency challenges. Remarkably, optimal ⁺ doping (20%) enhances the photoluminescence quantum yield (PLQY) from 28.69% 59.3%. Comprehensive theoretical investigations through density of states (DOS) calculations ab initio molecular dynamics (AIMD) simulations demonstrate induces bandgap narrowing enhanced radiative recombination while reinforcing crystal lattice stability. When integrated with UV LED chip, optimized enable fabrication high‐performance green LEDs exhibiting outstanding luminance (17 281 cd m − ) excellent color (CIE coordinates: 0.354, 0.518). This study provides not only practical synthetic approach stable copper halide but also valuable insights designing STE emitters applications.
Язык: Английский
Процитировано
0
Advanced Optical Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 28, 2025
Abstract The trade‐off between high radioluminescence (RL) and fast decay time is a common challenge facing almost all X‐ray scintillators. Organic fluorescence scintillators, with ultrafast response, readily available, low cost, are promising for imaging detection. Here, organic cocrystals of halogen‐bonded acceptors donors heavy halogen atoms (Br I) designed fabricated to achieve RL simultaneously. noncovalent interactions in play the following roles: 1) strong bonds C≡N···X (X = I, Br) promoted by providing effective pathways electron transfer, whereas relatively weaker C–X···π do not contribute this enhancement. 2) Halogen‐bonded can accelerate decay, resulting as interaction strength increases. 3) π–π modified their molecular packing affect fluorescence. Through modulation these interactions, cocrystal 1,4‐bis‐p‐cyanostyrylbenzene (CSB) 1,4‐diiodotetrafluorobenzene (IFB) exhibited best scintillation performance lifetime 0.58 ns detection limit 144.59 nGy s −1 , achieving resolution 10 lp mm . design combined cocrystallization strategy provides new insights into designing scintillator advanced applications.
Язык: Английский
Процитировано
0
Carbon Energy, Год журнала: 2025, Номер unknown
Опубликована: Май 23, 2025
ABSTRACT Cd‐based Cs 7 Cd 3 Br 13 perovskites, featuring both tetrahedral and octahedral polyhedral structures, have garnered significant acclaim for their efficient luminescent performance achieved through multi‐exciton state regulation by doping. However, it remains controversial whether the doping sites are in octahedra or tetrahedra of . To address this, we introduced Pb 2+ Sb 3+ ions and, supported experimental theoretical evidence, demonstrated that these preferentially occupy octahedra. Among them, single achieves a near‐unity photoluminescence quantum yield 93.7%, which results excellent X‐ray scintillation performance, high light 41,772 photon MeV −1 , low detection limit 29.78 nGy air s –1 Moreover, this incorporation enabled an exciton strategy, resulting standard white emission with CIE chromaticity coordinates (0.33, 0.33). Additionally, multifaceted optical anticounterfeiting information encryption scheme was designed based on differences properties caused different sensitivities [PbBr 6 ] 4 − octahedron [SbBr to temperature excitation wavelengths. These diverse characteristics provide new insights practical demonstrations advanced imaging, lighting, encryption, technologies.
Язык: Английский
Процитировано
0
CrystEngComm, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
It is proved that Ag + doped into Cs 3 Cu 2 Br 5 lattice through ion doping process, in (5–35%) optimizes at 25%, boosting PLQY from 27.38% to 90.62% and enhancing PL, PLE, XEL properties.
Язык: Английский
Процитировано
0
Nanotechnology, Год журнала: 2024, Номер 35(44), С. 445601 - 445601
Опубликована: Авг. 2, 2024
Cesium lead bromide (CsPbBr
Процитировано
2