Blue-Emitting Cu²⁺-Doped SrZn₂(PO₄)₂ Nanophosphor: Synthesis, Structure, and Optical Properties

What is it about?

SrZn2(PO4)2:Cu2+ nanophosphor was synthesized via a solution combustion route utilizing nitrate-based precursors. Comprehensive analysis was conducted to determine the phase identification, crystal structure, crystallite size, sample morphology, vibrational bands, bonding nature, dopant site environment, and emission properties. X-ray diffraction analysis revealed a monoclinic crystal structure with average crystallite size of 72 nm, while morphological characterization indicated an anisotropic stone-like structure with particle size in the nano range

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Why is it important?

Phosphor-converted white light-emitting diodes (WLEDs) are widely incorporated into the daily lives of humans, owing to their high energy efficiency, low power consumption, long lifetime, and environmentally friendly nature.1,2,3,4,5,6,7 A typical Pc-WLED is fabricated using a blue LED chip in combination with a yellow phosphor. However, there are some difficulties associated with this combination, such as poor color rendering and high CCT values. Insufficient blue and green emission and lack of red emission results in a narrow color range, making it unsuitable for display device applications.8,9 However, this drawback is overcome by developing a combination of ultraviolet (UV)-LED and tricolor (RGB) phosphors. The grouping of these multicolor phosphors will provide a wide color range, enabling a broad range of colors for display devices. Therefore, developing highly efficient blue-emitting phosphors is a major criterion for the fabrication of the UV-LED-based RGB phosphor system.

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