Rare-Earth Doping in Nanostructured Inorganic Materials

Chemical Reviews, Год журнала: 2022, Номер 122(6), С. 5519 - 5603

Опубликована: Янв. 6, 2022

Impurity doping is a promising method to impart new properties various materials. Due their unique optical, magnetic, and electrical properties, rare-earth ions have been extensively explored as active dopants in inorganic crystal lattices since the 18th century. Rare-earth can alter crystallographic phase, morphology, size, leading tunable optical responses of doped nanomaterials. Moreover, control ultimate electronic catalytic performance nanomaterials scalable manner, enabling significant improvements energy harvesting conversion. A better understanding critical role prerequisite for development an extensive repertoire functional practical applications. In this review, we highlight recent advances associated applications many fields. This review covers key criteria doping, including basic structures, lattice environments, strategies, well fundamental design principles that enhance electrical, catalytic, magnetic material. We also discuss future research directions challenges controlling

Язык: Английский

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Compact ultrabroadband light-emitting diodes based on lanthanide-doped lead-free double perovskites

Light Science & Applications, Год журнала: 2022, Номер 11(1)

Опубликована: Март 8, 2022

Impurity doping is an effective approach to tuning the optoelectronic performance of host materials by imparting extrinsic electronic channels. Herein, a family lanthanide (Ln3+) ions was successfully incorporated into Bi:Cs2AgInCl6 lead-free double-perovskite (DP) semiconductor, expanding spectral range from visible (Vis) near-infrared (NIR) and improving photoluminescence quantum yield (PLQY). After multidoping with Nd, Yb, Er Tm, Bi/Ln:Cs2AgInCl6 yielded ultrabroadband continuous emission spectrum full width at half-maximum ~365 nm originating intrinsic self-trapped exciton recombination abundant 4f-4f transitions Ln3+ dopants. Steady-state transient-state spectra were used ascertain energy transfer emissive processes. To avoid adverse interactions between various in single DP host, heterogeneous architecture designed spatially confine different dopants via "DP-in-glass composite" (DiG) structure. This bottom-up strategy endowed prepared Ln3+-doped DIG high PLQY 40% (nearly three times as that multidoped DP) superior long-term stability. Finally, compact Vis-NIR (400~2000 nm) light source easily fabricated coupling DiG commercial UV LED chip, this has promising applications nondestructive spectroscopic analyses multifunctional lighting.

Язык: Английский

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Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Июль 21, 2023

Abstract Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes risetimes) phosphor to measure temperature. This provides precise thermal readouts with superior spatial resolution in short acquisition times. Although thermometry just starting become more mature subject, it exhibits enormous potential several areas, e.g., optoelectronics, photonics, micro‐ nanofluidics, nanomedicine. work reviews latest trends field, including establishment comprehensive theoretical background standardized practices. The reliability, repeatability, reproducibility are also discussed, along use multiparametric analysis artificial‐intelligence algorithms enhance readouts. In addition, examples provided underscore challenges faces, alongside need for continuous search design new materials, experimental techniques, procedures improve competitiveness, accessibility, popularity technology

Язык: Английский

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Lanthanide doped luminescence nanothermometers in the biological windows: strategies and applications

Nanoscale, Год журнала: 2021, Номер 13(17), С. 7913 - 7987

Опубликована: Янв. 1, 2021

The development of lanthanide-doped non-contact luminescent nanothermometers operating in the biological windows spectral regions, strategies to improve their thermal sensitivities, and applications have been reviewed.

Язык: Английский

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Photon management to reduce energy loss in perovskite solar cells

Chemical Society Reviews, Год журнала: 2021, Номер 50(12), С. 7250 - 7329

Опубликована: Янв. 1, 2021

We systematically and hierarchically reviewed all of the photon management strategies to overcome energy loss in perovskite solar cells hope guide researchers achieve efficient light-harvesting semiconductor optoelectronic devices.

Язык: Английский

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Efficient Near‐Infrared Luminescence in Lanthanide‐Doped Vacancy‐Ordered Double Perovskite Cs₂ZrCl₆ Phosphors via Te⁴⁺ Sensitization

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(26)

Опубликована: Апрель 19, 2022

All-inorganic lead-free perovskite-derivative metal halides have shown great promise in optoelectronics, however, it remains challenging to realize efficient near-infrared (NIR) luminescence these materials. Herein, we report a novel strategy based on Te4+ /Ln3+ (Ln=Er, Nd, and Yb) co-doping achieve NIR vacancy-ordered double perovskite Cs2 ZrCl6 phosphors, which are excitable by low-cost near-ultraviolet light-emitting diode (LED) chip. Through sensitization the spin-orbital allowed 1 S0 →3 P1 transition of , intense multi-wavelength originating from 4f→4f transitions Er3+ Nd3+ Yb3+ was acquired, with quantum yield 6.1 % for emission. These findings provide general approach emission through ns2 -metal lanthanide ion co-doping, thereby opening up new avenue exploring NIR-emitting derivatives towards versatile applications such as NIR-LEDs bioimaging.

Язык: Английский

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Halide Double Perovskite Nanocrystals Doped with Rare‐Earth Ions for Multifunctional Applications

Advanced Science, Год журнала: 2023, Номер 10(20)

Опубликована: Апрель 28, 2023

Most lead-free halide double perovskite materials display low photoluminescence quantum yield (PLQY) due to the indirect bandgap or forbidden transition. Doping is an effective strategy tailor optical properties of materials. Herein, efficient blue-emitting Sb3+ -doped Cs2 NaInCl6 nanocrystals (NCs) are selected as host, rare-earth (RE) ions (Sm3+ , Eu3+ Tb3+ and Dy3+ ) incorporated into excellent PLQY 80.1% obtained. Femtosecond transient absorption measurement found that RE not only served activator but also filled deep vacancy defects. Anti-counterfeiting, thermometry, white-light-emitting diodes (WLEDs) exhibited using these ions-doped NCs. For thermometry based on Sm3+ :Sb3+ NCs, maximum relative sensitivity 0.753% K-1 which higher than those most temperature-sensing Moreover, WLED fabricated by NCs@PMMA displays CIE color coordinates (0.30, 0.28), a luminous efficiency 37.5 lm W-1 CCT 8035 K, CRI over 80, indicate NCs promising single-component phosphors for next-generation lighting technologies.

Язык: Английский

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Lanthanide-based ratiometric luminescence nanothermometry

Nano Research, Год журнала: 2022, Номер 16(2), С. 2949 - 2967

Опубликована: Сен. 21, 2022

Язык: Английский

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Quantitative Comparison of the Light-to-Heat Conversion Efficiency in Nanomaterials Suitable for Photothermal Therapy

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(29), С. 33555 - 33566

Опубликована: Июль 18, 2022

Functional colloidal nanoparticles capable of converting between various energy types are finding an increasing number applications. One the relevant examples concerns light-to-heat-converting that may be useful for localized photothermal therapy cancers. Unfortunately, quantitative comparison and ranking nanoheaters not straightforward as materials different compositions structures have photophysical chemical properties interact differently with biological environment. In terms properties, most information to rank these is light-to-heat conversion efficiency, which, along on absorption capacity material, can used directly compare materials. this work, we evaluate 17 belonging groups (plasmonic, semiconductor, lanthanide-doped nanocrystals, carbon metal oxides). We conclude efficiency alone meaningful enough many similar efficiencies─in range 80-99%─while they significantly differ in their extinction coefficient. therefore constructed qualitative based external which takes into account conventionally defined its capacity. This demonstrated differences samples more meaningfully. Among studied systems, top-ranking were black porous silicon CuS nanocrystals. These results allow us select favorable photo-based theranostics set a new standard characterization nanoheaters.

Язык: Английский

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Boosting STE and Nd³⁺ NIR Luminescence in Cs₂AgInCl₆ Double Perovskite via Na⁺/Bi³⁺‐Induced Local Structure Engineering

Advanced Functional Materials, Год журнала: 2023, Номер 33(50)

Опубликована: Авг. 21, 2023

Abstract Currently, lanthanide (Ln 3+ ) doped Pb‐free double perovskites (DPs) suffer from competitive emissions of the self‐trapped exciton (STE) and Ln . Herein, a new type Nd ‐doped Cs 2 AgInCl 6 DPs with Na + /Bi co‐alloying is developed. Benefiting ‐induced local structural modification, both STE broadband visible luminescence near‐infrared (NIR) are boosted via free sensitization. Specifically, total 648‐fold enhancement in emitting intensities compared to ‐free counterpart realized, significantly improved NIR photoluminescence quantum yield (PLQY) 0.16% 30.3%. First‐principles density functional theory calculations, Raman spectra, steady/transient‐state PL spectra verify modification site symmetry, breakdown parity‐forbidden absorption, reduction electron‐phonon coupling doping. Finally, compact vis–NIR light‐emitting diode (LED) designed by Na/Bi/Nd: DP commercial ultraviolet LED chip, which shows promising applications spectroscopic analyses multifunctional lighting.

Язык: Английский

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