Effect of Dopant Concentration on Luminescence Properties of NaCa(SO)F: RE (RE = Eu, Dy) Phosphor for Solid-State Lighting.

A fluoride material phosphor doped with rare earth ions Eu and Dy was studied for its photoluminescence (PL) properties. The material was synthesized using a combustion method and characterized using X-ray diffraction (XRD) and PL techniques. The NaCa(SO)F: Eu phosphor exhibits two distinct peaks at 593 nm (orange) and 615 nm (red) at an excitation wavelength of 395 nm.

Evaluation of kV-CBCT based 3D dose calculation accuracy and its validation using delivery fluence derived dose metrics in Head and Neck Cancer.

Purpose: The purpose of this study is to evaluate the dosimetric impact of Hounsfield unit (HU) variations in kilovoltage cone-beam computed tomography (kV-CBCT) based 3D dose calculation accuracy in the treatment planning system and its validation using measured treatment delivery dose (MTDD) derived dose metrics for Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiotherapy (IMRT) plans in Head and Neck (HN) Cancer.

Methods: CBCT dose calculation accuracy was evaluated for 8 VMAT plans on inhomogeneous phantom and 40 VMAT and IMRT plans of HN Cancer patients and validated using ArcCHECK diode array MTDD derived 3D dose metric on CT and CBCT.

Results: The mean percentage dose difference between CBCT and CT in TPS (ΔD(CBCT-CT)) and 3DVH (ΔD(CBCT-CT)) were compared for the corresponding evaluation dose metrics (D, D, D, D, D, D, D, D) of all PTVs and OARs in phantom and patients.

Solid state diffusion and amalgamating anionic exchange at a KNaSO phosphors activated with Eu , Dy and Sm rare earth ions to enhance w-LED performance.

In present work, KNa(SO ) phosphors doped with different concentrations of rare earth Eu , Sm and Dy ions (0.05, 0.1, 0.

Short review on recent progress in Mn -activated oxide phosphors for indoor plant light-emitting diodes.

In the modern era, growing number of indoor plants for various purposes, such as vegetation, flowering, and decorations, has increased over the traditional follow-up trends for plantation. However, the indoor plantation requires different parameters for their growth; among these, light plays a significant role. In order to control the growth of plants using light-emitting diodes, Mn-doped oxide phosphors have emerged as promising candidates due to their broad and intense emission bands in the red and far-red spectral range.

Enhanced photoluminescence in RE (Eu , Ce and Sm )-activated Ca (PO )F phosphors by double or triple ionized mineral doping: a comparative study.

In this work, RE (Eu, Ce and Sm)-activated Ca (PO ) F (fluorapatite) phosphors were synthesized by doping with different apatite minerals (SO , VO WO ) using a solid-state diffusion method. Optical and structural characterizations were performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and photoluminescence (PL) spectroscopy. XRD characterization showed the crystalline nature of the phosphor.