Sharp-to-Broad Band Energy Transfer in Lithium Aluminate and Gallate Phosphors for SWIR LED DOI Creative Commons
Yi‐Ting Tsai,

Pei-Xuan Chen,

Mikołaj Kamiński

et al.

ACS Applied Optical Materials, Journal Year: 2024, Volume and Issue: 2(12), P. 2401 - 2408

Published: March 1, 2024

Short-wave infrared (SWIR) phosphor-converted light-emitting diode (LED) technology holds promise for advancing broadband light sources. Despite the potential, limited research has delved into energy transfer mechanism from sharp-line to emission in SWIR phosphors, which remains underexplored. Herein, we demonstrate bright phosphors achieved through Cr

Language: Английский

Cr3+/Yb3+ Codoped Cs2NaInCl6 Double Perovskites for Near-Infrared Light-Emitting Diodes DOI
Xinyu Fu,

Huwei Li,

Hongxia Yue

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Near-infrared (NIR) light-emitting diodes (LEDs) are potential devices that could become the core components in biological imaging, security monitoring, etc., which currently constrained by suboptimal luminous efficiency due to absence of excellent luminescent materials. Here, we report a double perovskite Cs2NaInCl6 is suitable for Cr3+ doping and exhibits broad NIR emission. Through direct absorption energy transfer (ET) from self-trapped excitons (STEs) induced matrix, can be excited 4T1(P), 4T1(F), 4T2(F) levels. Then, emission with full width at half-maximum (FWHM) ∼150 nm, spanning 800 1300 high photoluminescence quantum yield (PLQY) up 70% realized, resulting 4T2→4A2 transition Cr3+. Subsequently, introduction Yb3+ endows Cs2NaInCl6:Cr3+,Yb3+ higher PLQY 76% optimal ratio than Cs2NaInCl6:Cr3+. Ultimately, miniaturized LED device packaged based on Cs2NaInCl6:15%Cr3+,15%Yb3+ has been fabricated, demonstrates superior performance night vision, traceless perspective detection, imaging. This work not only screens out matrix but also promotes its luminescence through applications.

Language: Английский

Citations

0
Ultra‐Broadband Near‐Infrared Luminescence from a Vanadium‐Activated Phosphate Glass DOI
Weirong Wang, Zhi Chen, Guanliang Yu

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(22)

Published: June 25, 2024

Abstract Broadband near‐infrared (NIR) emitting materials have gained considerable attention for their applications in lighting, displays, sensing, bio‐imaging, and optical amplification. Recently, numerous excellent broadband NIR are developed by introducing Cr 3+ , Bi + or Ni 2+ ions to various hosts. However, there is a notable absence of reports on ultra‐broadband emitters spanning the entire telecommunication window as well NIR‐I (700–1000 nm) NIR‐II (1000–1700 biological windows activated vanadium ions. Herein, study presents, first time best knowledge, emission ranging from 850 1600 nm (peaking at ≈1000 room temperature vanadium‐doped phosphate glass. Detailed spectra microscopic structure analysis reveal that two V ‐emitting centers predominantly contribute emission, corresponding 3 T 2 ( F)→ A F) spin‐allowed 1 E( D) spin‐forbidden electron transitions tetrahedrally coordinated Notably, tunability peak demonstrated adjusting local glass doping content. Moreover, glass‐converted light‐emitting diodes (gc‐LEDs) fabricated glass, potential demonstrated. The work opens new avenues design fabrication NIR‐emitting opto‐electronic devices.

Language: Английский

Citations

3
Broadband Near‐Infrared Cr4+‐Doped Garnet Phosphors through Divalent Calcium Charge Compensation for Advanced Crystal Fiber Amplifiers DOI
Yu‐Hsuan Hsiao, Kuan‐Chun Chen,

Chun‐Ling Chien

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(32)

Published: Aug. 12, 2024

Abstract Near‐infrared‐II (NIR‐II) phosphors are extensively used as NIR phosphor‐converted light‐emitting diodes across various applications. Nonetheless, their application in fiber communication remains underexplored. Furthermore, efficiency challenges persist developing broadband crystal amplifiers. A series of the Y 3− y Al 5− x O 12 : Cr, Ca 2+ with boosted Cr 4+ concentration via calcium charge compensation is synthesized, and optimized sample fabricated to fibers reveal NIR‐II communication. The ‐doped fiber, exhibiting emission within 1100–1600 nm, effectively covers high‐transmission loss region caused by water absorption telecommunication band. Comprehensive characterization analyses discussed. 2.84 4.9 :0.1Cr,0.16Ca through phosphor synthesis, pellets’ production, laser‐heated pedestal growth method, exhibits superior photoluminescence compared commercial 3 5 fiber. Here potential highlighted enhancing valuable insights for future provided.

Language: Английский

Citations

3
Ce3+,Cr3+ co-doped garnet phosphors with yellow and near-infrared emission for white and near-IR dual-mode pc-LEDs DOI

Qipeng Wu,

Jiali Tang,

Han Yue

et al.

Science China Materials, Journal Year: 2024, Volume and Issue: 67(12), P. 3932 - 3940

Published: Oct. 17, 2024

Language: Английский

Citations

2
Sharp-to-Broad Band Energy Transfer in Lithium Aluminate and Gallate Phosphors for SWIR LED DOI Creative Commons
Yi‐Ting Tsai,

Pei-Xuan Chen,

Mikołaj Kamiński

et al.

ACS Applied Optical Materials, Journal Year: 2024, Volume and Issue: 2(12), P. 2401 - 2408

Published: March 1, 2024

Short-wave infrared (SWIR) phosphor-converted light-emitting diode (LED) technology holds promise for advancing broadband light sources. Despite the potential, limited research has delved into energy transfer mechanism from sharp-line to emission in SWIR phosphors, which remains underexplored. Herein, we demonstrate bright phosphors achieved through Cr

Language: Английский

Citations

1