A single luminescence center ultra-broadband near-infrared LiScGeO₄:Cr phosphor for biological tissue penetration

Abstract

In this work, in order to meet the application of near-infrared phosphor-converted light emitting diodes (pc-LEDs), an ultra-broadband emission phosphor LiScGeO4:Cr phosphor was synthesized, and its FWHM reached 335 nm,...

A novel near-infrared phosphor Mg2InSbO6:Cr3+ with high quantum efficiency and considerable persistent luminescence duration

“…Due to the concentration quenching effect, the integrated intensity first increases and then decreases, relating to the non-radiative process. 4 It is clearly observed that the optimum concentration of Cr 3+ ions is 0.3 mol% in the MISO lattice.…”

“…After the Cr 3+ ions are doped into the MISO host, there are additional strong absorption bands between 3.75 Â 10 4 cm À1 and 1.50 Â 10 4 cm À1 ascribed to the absorption of Cr 3+ . Except for the approximately 1.75 Â 10 4 cm À1 absorption corresponding to the 4 A 2 -4 T 2 (4F) transition, the absorptions situated near 3.00 Â 10 4 cm À1 and 2.42 Â 10 4 cm À1 have originated from 4 A 2 -4 T 1 (4P) and 4 A 2 -4 T 1 (4F) transitions, respectively.…”

“…1 When it is used as a quality monitoring and non-destructive tool, the principles are based on the record and analysis of the NIR light reflection and transmission of characteristic functional groups, such as O-H, C-H and N-H bonds. [2][3][4][5] NIR spectroscopy has the merits of being nondestructive, rapid, cheap and convenient. To achieve convenient applications, there is a huge demand for small-sized NIR radiation sources with compact design and portable size.…”

“…Owing to the suitable size, NIR phosphor-converted LEDs (pc-LEDs) have been considered as the promising NIR light source with the advantages of high radiant flux, low power consumption and low cost. 3,4,6,7 Besides the application in LEDs, NIR phosphors with persistent luminescence (PersL) can be stimulated in vitro and generate NIR signals in vivo, which improves the signal-to-noise ratio and obtains higher quality imaging. 8,9 The NIR PersL materials have great potential in biological applications.…”

Design and synthesis of a novel blue-emitting CaNaSb2O6F:Bi3+ phosphor for optical temperature sensing

“…tration quenching mechanism should be the energy transfer between the nearest neighbor activators in the CNSOF:Bi 3+ phosphors. [65][66][67] To further confirm the energy transfer process, the decay curves of a series of CNSOF:xBi 3+ (x = 0.002-0.03) phosphors are plotted in Fig. 5.…”