Jaidass N, Krishna Moorthi C, Mohan Babu A, Reddi Babu M
School of Advanced Sciences, V I T University, Vellore, India.
Department of Physics, Chadalawada Ramanamma Engineering College, Tirupati, India.
Heliyon. 2018 Mar 14;4(3):e00555. doi: 10.1016/j.heliyon.2018.e00555. eCollection 2018 Mar.
Different concentrations of Dy ions doped lithium zinc borosilicate glasses of chemical composition (30-x) BO - 25 SiO -10 AlO -30 LiF - 5 ZnO - x DyO (x = 0, 0.1, 0.5, 1.0 and 2.0 mol%) were prepared by the melt quenching technique. The prepared glasses were investigated through X-ray diffraction, optical absorption, photoluminescence and decay measurements. Intensities of absorption bands expressed in terms of oscillator strengths (f) were used to determine the Judd-Ofelt (J-O) intensity parameters Ω (λ = 2, 4 and 6). The evaluated J-O parameters were used to determine the radiative parameters such as transition probabilities (A), total transition probability rate (A), radiative lifetime (τ) and branching ratios (β) for the excited F level of Dy ions. The chromaticity coordinates determined from the emission spectra were found to be located in the white light region of CIE chromaticity diagram.
采用熔体淬火技术制备了不同浓度Dy离子掺杂的锂锌硼硅酸盐玻璃，其化学组成为(30-x)BO - 25SiO -10AlO -30LiF - 5ZnO - xDyO（x = 0、0.1、0.5、1.0和2.0 mol%）。通过X射线衍射、光吸收、光致发光和衰减测量对制备的玻璃进行了研究。用振子强度（f）表示的吸收带强度用于确定Judd-Ofelt（J-O）强度参数Ω（λ = 2、4和6）。评估得到的J-O参数用于确定Dy离子激发F能级的辐射参数，如跃迁概率（A）、总跃迁概率速率（A）、辐射寿命（τ）和分支比（β）。由发射光谱确定的色度坐标位于CIE色度图的白光区域。
