Near‐Infrared Light Emitting Metal Halides: Materials, Mechanisms, and Applications

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 21, 2024

Near-Infrared (NIR) light emitting metal halides are emerging as a new generation of optical materials owing to their appealing features, which include low-cost synthesis, solution processability, and adjustable properties. NIR-emitting perovskite-based light-emitting diodes (LEDs) have reached an external quantum efficiency (EQE) over 20% device stability 10,000 h. Such results sparked interest in exploring NIR halide emitters. In this review, several different types halides, including lead/tin bromide/iodide perovskites, lanthanide ions doped/based double low dimensional hybrid Bi

Language: Английский

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Lanthanide Doping into All-Inorganic Heterometallic Halide Layered Double Perovskite Nanocrystals for Multimodal Visible and Near-Infrared Emission

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(5), P. 3200 - 3209

Published: Jan. 26, 2024

The introduction of lanthanide ions (Ln3+) into all-inorganic lead-free halide perovskites has captured significant attention in optoelectronic applications. However, doping Ln3+ heterometallic layered double perovskite (LDP) nanocrystals (NCs) and their associated mechanisms remain unexplored. Herein, we report the first colloidal synthesis (Yb3+, Er3+)-doped LDP NCs utilizing a modified hot-injection method. resulting exhibit efficient near-infrared (NIR) photoluminescence both NIR-I NIR-II regions, achieved through energy transfer down-conversion mechanisms. Density functional theory calculations reveal that dopants preferentially occupy Sb3+ cation positions, disruption local site symmetry lattices. By leveraging sensitizations intermediate levels, delved series Ln3+-doped Cs4M(II)Sb2Cl12 (M(II): Cd2+ or Mn2+) via co-doping strategies. Remarkably, observe brightening effect predark states Er3+ dopant Er3+-doped owing to Mn component acting as an bridge. This study not only advances our understanding doped but also propels for wider range

Language: Английский

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Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb³⁺-doped 0D organic metal chlorides

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2230 - 2241

Published: Jan. 1, 2024

We developed three NIR emitters of Sb 3+ -doped 0D organic metal chlorides and demonstrated their night vision applications in vision. One shows tunable emission characteristics quintuple-mode fluorescence anti-counterfeiting information encryption.

Language: Английский

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Near‐infrared emitting metal halide materials: Luminescence design and applications

InfoMat, Journal Year: 2024, Volume and Issue: 6(5)

Published: March 28, 2024

Abstract Near‐infrared (NIR) luminescent metal halide (LMH) materials have attracted great attention in various optoelectronic applications due to their low‐temperature solution‐processable synthesis, abundant crystallographic/electronic structures, and unique properties. However, some challenges still remain luminescence design, performance improvement, application assignments. This review systematically summarizes the development of NIR LMHs through classifying origins into four major categories: band‐edge emission, self‐trapped exciton (STE) ion defect‐related emission. The mechanisms different types are discussed detail by analyzing typical examples. Reasonable strategies for designing optimizing luminescence/optoelectronic properties summarized, including bandgap engineering, self‐trapping state chemical composition modification, energy transfer, other auxiliary such as improvement synthesis scheme post‐processing. Furthermore, prospects based on devices revealed, phosphor‐converted light‐emitting diodes (LEDs), electroluminescent LEDs, photodetectors, solar cells, x‐ray scintillators, well demonstrations related practical applications. Finally, existing future perspectives LMH critically proposed. aims provide general understanding guidance design high‐performance materials. image

Language: Английский

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Mn²⁺/Er³⁺‐Codoped Cs₂AgInCl₆ Double Perovskites with Dual Emission and Photochromism Properties for Anti‐Counterfeiting Application

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(6)

Published: Feb. 8, 2024

Abstract Highly transparent inorganic photochromic materials have several promising applications, especially for anti‐counterfeiting application. Enriching and enhancing the luminescent properties of perovskite by doping transition metals rare earth elements into host is a feasible attractive route. Codoping Mn 2+ Er 3+ can realize novel with upconversion emission ability within double structure Cs 2 AgInCl 6 .The : , single crystal be observed in reversible color variation from yellow to dark violet implementing under 365, 520 nm illumination or thermal treatment. In addition, emits red green light excitation 365 ultraviolet 980 laser, respectively. The introduction endowed ability, acted as bridge energy transfer excitons facilitating visible region. achieve luminescence material through its abundant levels acting synergistically . Herein, :Mn combines various optical has applications specific demands.

Language: Английский

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Efficient near‐infrared emission in lanthanum ion doped double perovskite Cs₂NaScCl₆ via Cr³⁺ sensitization under visible light excitation

EcoMat, Journal Year: 2024, Volume and Issue: 6(3)

Published: Jan. 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

Language: Английский

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Efficient tunable visible and near-infrared emission in Sb3+/Sm3+-codoped Cs2NaLuCl6 for near-infrared light-emitting diode, triple-mode fluorescence anti-counterfeiting and information encryption

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(11), P. 109462 - 109462

Published: Jan. 6, 2024

Language: Английский

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Tailoring Ultra‐Wide Visible‐NIR Luminescence by Ce³⁺/Cr³⁺/Yb³⁺‐alloying Sc‐Based Oxides for Multifunctional Optical Applications

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(15)

Published: Jan. 28, 2024

Abstract Visible‐to‐near‐infrared (VIS‐NIR) luminescent materials are in great demand the field of non‐destructive testing such as component determination and hyperspectral imaging. Although Cr 3+ ‐activated phosphors widely reported, controllable tailoring ultra‐wide VIS‐NIR luminescence excited by blue light is still a challenge. The strategies cationic substitution energy transfers effective for adjusting phosphors. In this work, series ‐doped Sc‐based solid solution (Ba 3‐m Sr m Sc 4 O 9 :Cr ) reported. Under excitation light, these exhibit broadband emission due to different centers induced occupying sites. Because weaker crystal strength, realizes with longer peak position (λ em = 820 nm) broader full width at half maximum (FWHM≈182 Ba 2 SrSc . Furthermore, Ce /Yb ions introduced into , achieving an (460–1200 →Cr →Yb multiple transfers. Designing beneficial improve quantum efficiency weaken thermal quenching. Finally, NIR phosphor‐converted light‐emitting diode (pc‐LED) fabricated demonstrates potential night‐vision water detection. This work provides design idea chemical transfer.

Language: Английский

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Synthesis and Photoluminescence Modulation of Cs₄Cd_1–xMn_xBi₂Cl₁₂-Based Two-Dimensional Layered Double Perovskites

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(42), P. 17382 - 17389

Published: Oct. 10, 2023

Two-dimensional (2D) layered double perovskites have attracted much attention because of their excellent photoelectric properties. However, few reports been published on the synthesis 2D from halide as precursors. Here, we report that CsCdCl3 and Cs3Bi2Cl9 were synthesized by coprecipitation method, a two-dimensional perovskite Cs4CdBi2Cl12 was readily mixing two perovskites. We doped different amounts Mn2+ into to form CsCd1–xMnxCl3, which introduced impurity states energy level exhibited an orange-red light emission is characteristic Mn2+. A series Cs4Cd1–xMnxBi2Cl12 CsCd1–xMnxCl3 Cs3Bi2Cl9, showed bright orange-yellow luminescence under ultraviolet excitation. The presence high concentrations Cd2+ in weakened strong Mn–Mn coupling suppressed transfer defects, thus minimizing nonradiative decay promoting efficient transfer. Our work provides new concept for low-dimensional metal with unique optical

Language: Английский

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Doping suppresses lattice distortion of vacant quadruple perovskites to activate self-trapped excitons emission

Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 3068 - 3078

Published: Sept. 27, 2023

Language: Английский

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