Orthogonal shortwave infrared emission based on rare earth nanoparticles for interference-free logical codes and bio-imaging

Ma, Longhua; Zhai, Xuejiao; Du, Gaiping; Zhou, Jing

doi:10.1039/c8sc05044a

Cited by 19 publications

(10 citation statements)

References 46 publications

(60 reference statements)

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“…Moreover, it is predicted that they will reach the performance of visible LEDs after 20 years if the market can continue to stimulate their development . Compared with the above-mentioned SWIR light sources, SWIR phosphor-converted LEDs constructed by combining commercial blue LEDs with SWIR-emitting phosphors are becoming a promising strategy for the development of new solid-state SWIR emitters with broad emission bands, small size, high photoconversion efficiency, high output power, and affordable price by adopting the well-developed phosphor-converted white LED technology. − Despite these advantages, it remains a dispiriting challenge to develop SWIR-emitting phosphor materials with desirable absorption band in the visible region (especially blue light), broadband emission band in the SWIR, and high luminous efficacy.…”

Section: Introductionmentioning

confidence: 99%

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor

Miao

Liang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

101

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Short-wave infrared (SWIR) spectroscopy has recently emerged as an important technology across a wide range of areas, whether industrial, biomedical, or environmental. Nevertheless, it is still a longstanding challenge to develop robust SWIR light sources. The SWIR phosphor-convert light emitting diodes (LEDs) by coating blue LED chips with desirable SWIR-emitting phosphors are becoming an ideal alternative for solid-state SWIR light sources due to its compactness, low-cost, and long operating lifetime, as does the commercial white LEDs. Herein, we report a blue-pumped Cr 3+ -doped LiScGeO 4 SWIR phosphor as a luminescent converter for phosphor-convert SWIR LEDs. This phosphor shows an intense SWIR emission band with a peak wavelength at ∼1120 nm owing to the 4 T 2 → 4 A 2 electron transition of Cr 3+ when exciting with blue light. The full width at half-maximum (fwhm) of the phosphor is ∼300 nm and the absolute quantum efficiency is determined to be ∼26%. SWIR LED prototypes are constructed by combining the optimized phosphor materials with commercial blue InGaN LED chips, which can generate a commendable emission band in the SWIR region over 800−1600 nm and achieve a maximum output power of ∼4.78 mW at 60 mA with the photoconversion efficiency of 4.4%. The current exploration of Cr 3+ -doped SWIR-emitting phosphors will lay the foundation to engineer phosphor-convert SWIR LEDs for applications in night-vision surveillance and SWIR spectroscopy technology. These blue-light-excitable SWIR-emitting phosphors can serve as an important complement to the spectral gap of the current Cr 3+ -doped phosphors in the SWIR region and will pave the way toward cost-effective phosphor-converted solid-state SWIR light sources.

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Section: Introductionmentioning

confidence: 99%

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor

Miao

Liang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

101

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“…To facilitate rapid multicolor imaging in the SWIR region, we diverged from traditional multiplexing approaches employing a common excitation wavelength and different detection windows, 21 , 22 , 23 , 24 , 25 , or spectral unmixing 18 . These classic approaches can result in different resolutions for each channel due to dramatic changes in the contrast and resolution that occur throughout wavelength bands of the NIR and SWIR.…”

mentioning

confidence: 99%

Shortwave infrared polymethine fluorophores matched to excitation lasers enable non-invasive, multicolour in vivo imaging in real time

et al. 2020

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High resolution, multiplexed experiments are a staple in cellular imaging. Analogous experiments in animals are challenging, however, due to significant scattering and autofluorescence in tissue at visible (VIS, 350–700 nm) and near-infrared (NIR, 700–1000 nm) wavelengths. Here, we enable real-time, non-invasive multicolor imaging experiments in animals through the design of optical contrast agents for the shortwave infrared (SWIR, 1000–2000 nm) region and complementary advances in imaging technologies. We developed tunable, SWIR-emissive flavylium polymethine dyes and established structure-photophysical property relationships for this class of bright SWIR contrast agents. In parallel, we designed an imaging system with variable NIR/SWIR excitation and single-channel detection, facilitating video-rate multicolor SWIR imaging for optically guided surgery and imaging of awake and moving mice with multiplexed detection. Optimized dyes matched to 980 nm and 1064 nm lasers, combined with the clinically approved indocyanine green, enabled real-time, three-color imaging with high temporal and spatial resolutions.

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“…[54,[56][57][58][59][60][61] In this way, RE has been widely applied in areas such as light emitting diode (LED), lasers, and bioimaging, whether as hosts or dopants. [43,[62][63][64][65][66] In addition to the wellknown luminescence properties, RE has also been reported with excellent magnetism like 2D ferromagnetism (FM) originated from their unpaired 4f electrons. [35,67,68] Owing to unique structure related to topological semimetal, some of them possess CDW properties and become superconducting under high pressure.…”

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confidence: 99%

Recent Advances in 2D Rare Earth Materials

Chen

Han

Zhao

et al. 2020

Adv Funct Materials

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2D rare earth (RE) materials have received considerable attention in recent years due to the fascinating luminescence, magnetism, and electric properties originated from RE associated with sharp and various emission peaks, intrinsic 2D ferromagnetism, and incommensurate charge density wave. These materials might open up a new prospect in next‐generation lighting, magnetic devices, and phototransistors. Herein, a comprehensive review of 2D RE materials is presented, focusing on their recent progresses. First, the crystal structures of 2D RE materials are discussed. Then, typical synthesis methods such as mechanical exfoliation, molecular beam epitaxy, pulsed laser deposition, and chemical vapor deposition are introduced. Furthermore, various properties in luminescence, magnetism, and electronics are summarized. The recently reported RE‐based 2D novel photodetectors are outlined as three constructions: MoS2/RE, graphene/RE, and perovskite/RE, which show promising applications for both narrow and broad band detection arised from the special absorption windows of different RE elements. Finally, the conclusions and outlook of this area are proposed, such as exploring novel 2D RE compounds, improving stability, and broadening applications.

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Orthogonal shortwave infrared emission based on rare earth nanoparticles for interference-free logical codes and bio-imaging

Abstract: The NaErF4@NaLuF4 and NaYF4:Nd@NaLuF4 emitted orthogonal shortwave infrared (SWIR) lights, which were separated by optical filter, applied in invisible logical codes and interference-free bio-imaging.

Cited by 19 publications

References 46 publications

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor

Shortwave infrared polymethine fluorophores matched to excitation lasers enable non-invasive, multicolour in vivo imaging in real time

Recent Advances in 2D Rare Earth Materials

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Orthogonal shortwave infrared emission based on rare earth nanoparticles for interference-free logical codes and bio-imaging

Abstract: The NaErF4@NaLuF4 and NaYF4:Nd@NaLuF4 emitted orthogonal shortwave infrared (SWIR) lights, which were separated by optical filter, applied in invisible logical codes and interference-free bio-imaging.

Cited by 19 publications

References 46 publications

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr3+-Doped LiScGeO4 Phosphor

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr3+-Doped LiScGeO4 Phosphor

Shortwave infrared polymethine fluorophores matched to excitation lasers enable non-invasive, multicolour in vivo imaging in real time

Recent Advances in 2D Rare Earth Materials

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Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor

Broadband Short-Wave Infrared Light-Emitting Diodes Based on Cr³⁺-Doped LiScGeO₄ Phosphor