Enhanced and modulated visible luminescence of Pr3+:CaF2 crystal by co-doping R3+ (R=Y, Gd, Lu) ions

Original Na5(Lu1–x–yGdxYy)9F32: Pr3+/Ho3+ Hybrid Single Crystals for Efficient ∼2.9 μm Mid-Infrared Emission

“…Thus, more luminescent centers of Ho 3+ ions are released and an enhancement of 2.9 μm emission is observed as a consequence of the reduction of the energy transfer probability between luminous ions. 31 The energy transfer must conduct study to thoroughly understand the impact of the introduction of Y 3+ or Gd 3+ on the 1.2, 2.0, and 2.9 μm emissions. Figure 6 illustrates the simplified diagram of the energy level for Gd 3+ /Y 3+ /Ho 3+ /Pr 3+ multidoped Na 5 Lu 9 F 32 single crystals excited at 640 nm.…”

“…Leading optically inactive Y 3+ or Gd 3+ ions into Ho 3+ /Pr 3+ -doped Na 5 Lu 9 F 32 single crystals helps to prevent Ho 3+ and Pr 3+ from aggregating in the host. Thus, more luminescent centers of Ho 3+ ions are released and an enhancement of 2.9 μm emission is observed as a consequence of the reduction of the energy transfer probability between luminous ions . The energy transfer must conduct study to thoroughly understand the impact of the introduction of Y 3+ or Gd 3+ on the 1.2, 2.0, and 2.9 μm emissions.…”

White light and near-infrared emissions of Pr3+ ions in SiO2-LaF3 sol–gel nano-glass-ceramics

“…For instance, the emission within the red or reddish-orange light area predisposes Pr 3+doped materials as essential parts of optical devices with great utility in LED technologies [3][4][5][6][7] or as gain media for laser output at ∼645 nm. [8][9][10] Additionally, the modifications in the composition of the host materials as well as in Pr 3+ concentration allow for obtaining the appropriate combinations of blue, green, and reddish-orange luminescence, which could result in the generation of white-light emission, as described for LaAlO 3 :Pr 3+ and YF 3 :Pr 3+ nanocrystals or K 3 La(PO 4 ) 2 :Pr 3+ phosphors. 11,12 The infrared luminescence of Pr 3+ -doped materials at ∼1.0 μm ( 1 D 2 → 3 F 3,4 transitions), ∼1.35 μm ( 1 G 4 → 3 H 5 transition), and ∼1.6 μm ( 3 F 3,4 → 3 H 4 transition), which covers NIR-II and NIR-III biological windows, make them interesting host matrices in the field of in vivo bioimaging.…”

Luminescence Property and Judd-Ofelt Analysis of 0.6%Pr, x%La:CaF2 Crystals

“…In the past few decades, with the development of GaN/InGaN laser diode (LD), the solid-state laser source at visible light range has very important prospects in various applications, such as biomedical, data storage, remote sensing and quantum optics [2][3][4][5][6] . Trivalent praseodymium ions (Pr 3+ ) can achieve transition emission from deep red ( 3 P0→ 3 F4), red ( 3 P0→ 3 F2), orange ( 3 P0→ 3 H6), green ( 3 P0,1→ 3 H5) to blue ( 3 P0→ 3 H4) region due to its plentiful energy level structures [7][8][9][10] . Therefore, Pr 3+ -doped laser materials have attracted much attention in the development process of all visible solid-state lasers [11][12] .…”