Synergistic enhancement of the near-infrared luminescence properties of Ni²⁺-doped SrTiO₃ perovskite phosphors and their application

Abstract

A synergistic strategy to efficiently improve the near-infrared luminescence of a Ni2+-doped SrTiO3 perovskite-type phosphor both in terms of luminous intensity and thermostability by cation site substitution.

BaLiZn3(PO4)3:Eu2+: Ultranarrow-Band Violet Emission in a Highly Symmetric Crystal Structure

“…For the purpose of further exploring the practical applications in pc-LEDs, a simple LED device was fabricated by coating the as-prepared BLZPO:1%Eu 2+ sample on the surface of 340 nm UV-LED chip. The merit of n-UV LED as an excitation source could decrease the continual exposure to the intense blue LED emission from these modern displays causing insomnia and mood disorders. − The single-color UV-pumped pc-LED of BLZPO:1%Eu 2+ emits violet light with the CIE color coordinate of (0.208, 0.176) under a voltage of 3.19 V and a current of 20 mA (Figure a,b). The fabricated pc-LED is used to testify the anticounterfeiting signs of paper money for 10 and 100 yuan.…”

Eu2+/Eu3+-doped oxyfluoride glass-ceramics for modular warm white emission

“…Despite this improvement, it is still impossible to avoid the inherent “efficiency dip” of LEDs, and the photoelectric conversion efficiency sharply decreases as the input current density increases. 42–49 In contrast, the photoelectric conversion efficiency of laser diodes (LDs) can be maintained at high values, even with high input power densities, making them significantly better than LED chips. Based on this feature, the Nichia Corporation in Japan has developed a laser illumination technology with LD excitation, with no issues related to a sudden drop in efficiency.…”

Boosting broadband short-wave infrared emission to achieve near-unity quantum efficiency via bridging Cr3+–Ni2+ in spinel solid-solutions towards light-emitting diode applications

“…26 Ni 2+ ions, with a 3d 8 electron configuration, have attracted much attention owing to their typical broadband SWIR emissions. Various host materials doped with Ni 2+ ions have been reported to induce broadband SWIR emission, such as MgTi 2 O 5 :Ni 2+ (IQE = 23.7%), 8 MgTa 2 O 6 :Ni 2+ (IQE = 25.62%), 27 Y 3 Al 2 Ga 3 O 12 :Ni 2+ (IQE = 54%), 28 SrTiO 3 :Ni 2+ (IQE = 7.7%), 29 LiGa 5 O 8 :Ni 2+ (IQE = 10%), 30 and Li (0.2) MgO: Ni 2+ (IQE = 45.8%). 31 However, most of them show limited absorption efficiency in the blue light region and inferior quantum efficiency.…”