Enhanced thermal stability of broadband NIR phosphors Ca3.3Mg0.7ZrGe3O12:Cr3+ for pc-LEDs
Source abstract
Abstract
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are playing an increasingly important role in the spectroscopy technology fields. Developing high-performance NIR-emitting phosphors is of immense significance for advancing NIR pc-LEDs. Herein, the approach of cationic substitution of Ca 2+ by Mg 2+ was designed in Ca 4ZrGe 3O 12:Cr 3+. Remarkably enhanced NIR emission and strikingly improved thermal stability are realized. The luminescence intensity at 423 K compared with that of room temperature ascends from 45.67 % to 72.81 %. Moreover, the representative sample was assembled to a NIR pc-LED with favorable output power and photoelectric conversion efficiency by combining a commercial 470 nm blue chip. The packaged LED demonstrates the feasibility of practical applications in night vision, biological imaging, and fruit detection. The above findings verify the potential prospect of Ca 4-xMg xZrGe 3O 12:Cr 3+ phosphor for the utilizations in NIR light sources.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Optical and Acousto-Optic Technologies · Photorefractive and Nonlinear Optics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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