Department of Physics, R.T.M. Nagpur University, Nagpur, India.
Luminescence. 2022 Jan;37(1):141-152. doi: 10.1002/bio.4155. Epub 2021 Nov 30.
In the current investigation, a series of NaCa PO :xDy (x = 0.1, 0.3, 0.5, 0.7, 1.0, 1.5 and 2 mol%) phosphors were synthesized using a solution combustion method and citric acid as fuel. The investigated results from the X-ray diffraction (XRD) pattern showed phase purity of the synthesized material and orthorhombic crystal structure with space group Pna21. Photoluminescence properties of the synthesized phosphors were investigated. The synthesized Dy -activated phosphor displayed blue (482 nm) and yellow (576 nm) emission under near-ultraviolet or blue excitations. These emission bands were ascribed due to the F → H and F → H transitions of Dy ions. Commission International de l'Eclairage chromaticity coordinates showed emission in the near-white region for the proposed phosphors under different excitations. In addition, the current-voltage (I-V) characteristics of the NaCa PO :xDy (x = 1.5 mol%) phosphor-coated silicon solar cell and an uncoated solar cell were investigated under a solar simulator. The I-V characteristics of the proposed phosphor-coated silicon solar cell showed enhancement in solar cell efficiency by ~7.92%. The entire studies and their outcomes showed that synthesized phosphors have potential as white light emitting diodes and for solar applications.
在当前的研究中，使用溶液燃烧法和柠檬酸作为燃料合成了一系列 NaCa PO :xDy（x = 0.1、0.3、0.5、0.7、1.0、1.5 和 2 mol%）荧光粉。从 X 射线衍射（XRD）图谱的研究结果表明，所合成材料具有单相纯度和正交晶相结构，空间群为 Pna21。研究了合成荧光粉的光致发光性能。合成的 Dy 激活荧光粉在近紫外或蓝光激发下显示蓝色（482 nm）和黄色（576 nm）发射。这些发射带归因于 Dy 离子的 F → H 和 F → H 跃迁。国际照明委员会色度坐标表明，在不同激发下，所提出的荧光粉在近白光区域发射。此外，在太阳模拟器下研究了 NaCa PO :xDy（x = 1.5 mol%）荧光粉涂覆硅太阳能电池和未涂覆太阳能电池的电流-电压（I-V）特性。提出的荧光粉涂覆硅太阳能电池的 I-V 特性表明，太阳能电池效率提高了约 7.92%。所有研究及其结果表明，所合成的荧光粉具有作为白光发光二极管和太阳能应用的潜力。
