Enticing applications of near‐infrared phosphors: Review and future perspectives

Abstract

Near‐infrared (NIR) phosphors have gained a substantial amount of attention in the past few years simply due to their numerous applications. Recent publications have reported interesting findings regarding the fundamentals of phosphors. However, the unclear application of these phosphors limits their potential. This mini review aims to provide insights for researchers regarding the potential applications of NIR phosphors and their perspectives for further development of NIR phosphor technology.

Near-Infrared Emitting Phosphor LaMg0.5(SnGe)0.5O3:Cr3+ for Plant Growth Applications: Crystal Structure, Luminescence, and Thermal Stability

“…As shown in Figure 4a, LMS:Cr 3+ exhibits a wide excitation band in the range of 240−680 nm. The excitation bands at 467 and 621 nm are attributed to the 4 A 2 (F) ⃗ 4 T 1 (F) and 4 A 2 (F) ⃗ 4 T 2 (F) transitions of Cr 3+ , respectively. Upon 467 nm light excitation, when the Cr 3+ concentration is small, LMS: Cr 3+ exhibits a narrow emission peak at 754 nm, which is attributed to the 2 E ⃗ 4 A 2 transition.…”

“…Pfr and Pr are interconverted to stimulate the growth of plants and more light is obtained by them. 4 Photosynthetic bacteria, which are widely found in soil, play an important role in plant growth, especially in roots. They can absorb NIR light and convert the inorganic salts in the environment into amino acids and nucleotides that are easy for plants to absorb, thus promoting the biological nitrogen fixation of plants and promoting plant growth.…”

“…Previous studies have shown that NIR light promotes growth because of its strong tissue penetration, which can pass through the shielding leaves. Pfr and Pr are interconverted to stimulate the growth of plants and more light is obtained by them . Photosynthetic bacteria, which are widely found in soil, play an important role in plant growth, especially in roots.…”

A broadband near‐infrared Sc1−x(PO3)3:XCr3+ phosphor with enhanced thermal stability and quantum yield by Yb3+ codoping

“…Near-infrared (NIR) light (650-1400 nm) by virtue of high penetration ability has been widely applied in night-vision, disease diagnosis, and bio-imaging. 1,2 Currently, there are two kinds of mature NIR light sources in market: one is the traditional tungsten-halogen lamps, and the other one is the NIR light-emitting diodes (LEDs). The former ones can exhibit a broadband spectrum covering from the ultraviolet to infrared ranges, however, with the disadvantages of large size, poor efficiency, and high energy consumption, leading to limitation in laboratory for NIR spectroscopic techniques.…”

“…Near‐infrared (NIR) light (650–1400 nm) by virtue of high penetration ability has been widely applied in night‐vision, disease diagnosis, and bio‐imaging 1,2 . Currently, there are two kinds of mature NIR light sources in market: one is the traditional tungsten–halogen lamps, and the other one is the NIR light‐emitting diodes (LEDs).…”