Ceramics International, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Advanced Materials, Год журнала: 2025, Номер unknown
Опубликована: Фев. 13, 2025
Abstract Halide perovskites (HPs), emerging as a noteworthy class of semiconductors, hold great promise for an array optoelectronic applications, including anti‐counterfeiting, light‐emitting diodes (LEDs), solar cells (SCs), and photodetectors, primarily due to their large absorption cross section, high fluorescence efficiency, tunable emission spectrum within the visible region, tolerance lattice defects, well adaptability solution‐based fabrication processes. Unlike luminescent HPs with band‐edge emission, trivalent rare‐earth (RE) ions typically emit low‐energy light through intra‐4f optical transitions, characterized by narrow spectra long lifetimes. When fused, cooperative interactions between REs endow resulting binary composites not only properties inherited from parent materials but also introduce new attributes unattainable either component alone. This review begins fundamental characteristics REs, followed particular focus on impact electronic structures associated energy transfer The advanced synthesis methods utilized prepare HPs, RE‐doped compounds, are overviewed. Furthermore, potential applications summarized across diverse domains, high‐fidelity anticounterfeiting, bioimaging, LEDs, photovoltaics, photodetection, photocatalysis, conclude remaining challenges future research prospects.
Язык: Английский
Процитировано
2
Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(45)
Опубликована: Сен. 19, 2023
Abstract Lead‐free halide double perovskites are currently gaining significant attention owing to their exceptional environmental friendliness, structural adjustability as well self‐trapped exciton emission. However, stable and efficient perovskite with multimode luminescence tunable spectra still urgently needed for multifunctional photoelectric application. Herein, holmium based cryolite materials (Cs 2 NaHoCl 6 ) anti‐thermal quenching photoluminescence were successfully synthesized. By the further alloying of Sb 3+ ( s ‐ p transitions) Yb f ions, its properties can be modulated, originating from tailoring band gap structure enriching electron transition channels. Upon substitution in Cs , additional absorption peaking at 334 nm results tremendous increase quantum yield (PLQY). Meanwhile, not only typical NIR emission around 980 Ho is enhanced, but also red emissions show a diverse range behaviors. Furthermore, through designing doping, up‐conversion triggered by changing excitation laser power density (yellow‐to‐orange) doping concentration (red‐to‐green). Through combined experimental‐theoretical approach, related mechanism revealed. In general, /Yb abundant energy level ladders constructed more modes derived, demonstrating great potential applications.
Язык: Английский
Процитировано
37
Advanced Functional Materials, Год журнала: 2024, Номер 34(45)
Опубликована: Авг. 8, 2024
Abstract The study on phosphors‐converted white light‐emitting diodes (pc‐WLEDs) using lead‐free double perovskites (DPs) as single‐component phosphors is widely concerned. However, the photoluminescence quantum yields (PLQY) of luminescence and color rendering index (CRI) WLED are not satisfactory. Herein, a new Sb/Ho: Cs 2 Na 0.9 Ag 0.1 (In/Bi)Cl 6 phosphor with highest PLQY 93% record CRI 97.4 reported. Experimental data theoretical calculations evidence that in addition to broadband yellow emission self‐trapped exciton (STE) recombination, material also exhibits blue from Sb 3+ : 3 P 1 → S 0 transition red one assigned Ho 5 F I 8 transition. Steady‐state time‐resolved PL spectra verify existence two energy transfer channels both STE dopants. As demo, (In/Bi) Cl6‐based constructed, showing excellent comprehensive optical performance specially improved saturation R9 R12. This work provides novel rare‐earth doped DP for high full‐spectrum solid‐state lighting.
Язык: Английский
Процитировано
15
EcoMat, Год журнала: 2024, Номер 6(3)
Опубликована: Янв. 25, 2024
Abstract Herein, we synthesized Cr 3+ /Ln (Er , Tm )‐codoped rare earth‐based Cs 2 NaScCl 6 double perovskite, and the near‐infrared emission of Ln can be excited by visible light through energy transfer (ET) from to . Moreover, there are two independent bands, which stems 4 T → A transition (970 nm) f‐f (1542 nm for Er 1220 ), respectively. Particularly, both compounds have ultra‐high photoluminescence quantum yield (PLQY) 60% 10%Cr /6%Er ‐codoped emission: ∼26%) 68% /4.5%Tm (Tm ∼56%), attributed ET efficiency similar ionic activity Sc allowing more dopants enter host lattice. Considering excellent stability samples, demonstrated /Tm in applications imaging night vision. Finally, reported /9%Er ‐tridoped further applied it optical thermometry. image
Язык: Английский
Процитировано
13
Small, Год журнала: 2024, Номер 20(35)
Опубликована: Апрель 29, 2024
Abstract Rare‐earth halide double perovskites (DPs) have attracted extensive attention due to their excellent optoelectronic performance. However, the correlation between luminescence performance, crystal structure, and temperature, as well inherent energy transfer mechanism, is not understood. Herein, Lanthanide ions (Ln 3+ : Nd or Dy ) co‐dopants are incorporated into Sb doped Cs 2 NaYbCl 6 DPs construct (ET) models reveal effects of temperature levels rare earth on ET. The different excited state structures ‐Ln at temperatures relative positions synergistically determine physical processes luminescence. These multi‐mode luminescent materials exhibit good performance in anti‐counterfeiting, NIR imaging, sensing. This work provides new insights mechanism related photophysical process.
Язык: Английский
Процитировано
13
Laser & Photonics Review, Год журнала: 2024, Номер 18(11)
Опубликована: Июль 5, 2024
Abstract Traditional anti‐counterfeiting luminescent phosphors are usually composed of single‐mode photoluminescence materials, which greatly limits the security encryption by its static fluorescent pattern. Herein, multi‐mode luminescence properties achieved including fluorescence and persistent (PersL) within single host co‐doping Bi 3+ Eu in CaNaSb 2 O 6 F (CNSOF). A tunable emission is observed from blue (Bi , 3 P 1 → S 0 ) to white then orange‐yellow (Eu 5 D 7 0, 1, 2, 3, 4 as excitation schemes, environment temperatures doping level modulated. Impressively, attributed rapidly disappears after stopping light irradiation, only intense PersL produced can be observed. And a possible model for energy transfer mechanism proposed investigation crystal structure photoluminescence/PersL. schematic logo digital information demonstrated using prepared samples, shows dynamic evolution color brightness. The excellent property multiple outputs, different decay processes, external field stimulation modes (including low light, thermal, mechanical stimuli) present CNSOF:Bi provides fast, low‐cost, effective method advanced applications.
Язык: Английский
Процитировано
10
Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179628 - 179628
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
2
Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 178756 - 178756
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Aggregate, Год журнала: 2023, Номер 5(1)
Опубликована: Авг. 24, 2023
Abstract Recently, many lead‐free metal halides with diverse structures and highly efficient emission have been reported. However, their poor stability single‐mode color severely limit applications. Herein, three homologous Sb 3+ ‐doped zero‐dimensional (0D) air‐stable Sn(IV)‐based different crystal were developed by inserting a single organic ligand into SnCl 4 lattice, which brings optical properties. Under photoexcitation, (C 25 H 22 P)SnCl 5 @Sb·CH O ( −1 ) does not emit light, P) 2 6 @Sb‐α −2α shines bright yellow photoluminescence quantum yield (PLQY) of 92%, @Sb‐β −2β exhibits intense red PLQY 78%. The above compounds show quite properties should be due to the lattice distortions. Particularly, can successfully converted under treatment C PCl solution, accompanied transition from nonemission emission, serving as “turn‐on” (PL) switching. Parallelly, reversible structure conversion between was witnessed after dichloromethane or volatilization treatment, Thereby, triple‐mode tunable PL switching off–on I –on II constructed in compounds. Finally, we demonstrated as‐synthesized fluorescent anticounterfeiting, information encryption, logic gates.
Язык: Английский
Процитировано
18
Inorganic Chemistry, Год журнала: 2024, Номер 63(23), С. 10756 - 10766
Опубликована: Май 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.
Язык: Английский
Процитировано
8