Improving and broadening luminescence in Gd_2−xAl_xGaSbO₇:Cr³⁺ phosphors for NIR LED applications

Abstract

Near-infrared (NIR) spectroscopy has garnered substantial concerns attributing to its diverse merits and widespread applications. While developing phosphors with broadband and efficient NIR emission is still an enormous challenge for...

Rational design for broad near-infrared emission from a two-sited Rb2LiAlF6:Cr3+ phosphor with high efficiency and thermal stability for spectroscopic applications

“…This was due to the unit cell expansion in the hot environment. 43 In addition, the emission band became gradually wider, with an increase in FWHM from 125 nm to 158 nm (Fig. 3f ), which originated from the stronger EPC effect at higher temperatures.…”

Efficient Near-Infrared Luminescence with Near-Unity Photoluminescence Quantum Yield in Erbium-Doped Double Perovskites Cs2NaYCl6 under Green Light Excitation

“…Figure a exhibits the electroluminescence spectra of NIR LEDs, and the optical images of the corresponding NIR-LEDs are given in the inset of Figure a. Clearly, the electroluminescence spectra of Ln 3+ -doped Cs 2 NaYCl 6 show a sharp-peak NIR emission band, which is different from Cr 3+ -activated and Eu 2+ -activated NIR phosphors with broadband emission in 700–1100 nm, − which will severely limit the desired applications in 3D sensing and food inspection. Nonetheless, our Ln 3+ -activated NIR emitters also have their unique advantages.…”

Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb3+-doped 0D organic metal chlorides

“…In particular, this excellent PL intensity at high temperature in our system is comparable to the recently reported oxide phosphors with NIR emission, such as Gd 2Àx Al x GaSbO 7 :Cr 3+ , BaZrGe 3 O 9 :Cr 3+ , and K 3 S c Si 2 O 7 :Eu 2+ . 8,56,57 Meanwhile, the Sb 3+ -doped samples also show remarkable photostability, with only a slight decrease in PL intensity even under 365 nm UV lamp irradiation for 4 hours (Fig. S30, ESI †).…”