Na5Gd(MoO4)4: Sm3+ – A red molybdate phosphor with exceptional thermal stability for plant growth lighting

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-31 DOI:10.1016/j.jphotochem.2025.116307

Haochang Ye , Wei Zhang , Xuxin Cheng , Zhengfa Hu , Xia Sheng , Wei Xie , Zuyong Feng , Lanwei Qiu , Guangting Xiong

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Abstract

Na₅Gd_1−x(MoO₄)₄:xSm³⁺ (x = 0–0.12) phosphors were synthesized via a high-temperature solid-state technique. Comprehensive analysis was performed on the phase purity, crystal structure, luminescence behavior, and thermal stability of the phosphors. Under excitation at 405 nm, due to the ⁴G_5/2-⁶H_i (i = 5/2, 7/2, 9/2, and 11/2) transitions of Sm³⁺ ions, the phosphors emit relatively intense red light. Remarkably, at 150 °C, the integrated emission intensity of Na₅Gd_0.92(MoO₄)₄:0.08Sm³⁺ attains 96 % of its value at ambient temperature, demonstrating its excellent thermal stability. A LED light source is created using a commercial 405 nm LED chip and Na₅Gd_0.92(MoO₄)₄:0.08Sm³⁺ phosphor, emitting a vibrant red light. Its electroluminescence spectrum overlaps with the absorption peaks of plant chlorophyll a/b and the phytochrome P_R/P_FR spectra, indicating its potential for use in plant growth lighting applications.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.