White light emission from Dy3+-doped ZnO + Bi2O3 + BaF2 + B2O3 + TeO2 glasses: Structural and spectroscopic properties.
White light emission from Dy3+-doped ZnO + Bi2O3 + BaF2 + B2O3 + TeO2 glasses: Structural and spectroscopic properties.
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DOI：
10.1016/j.saa.2020.118568
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发表时间：
2020-06
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通讯作者：
C. Sumalatha;Ramachari Doddoji;M. Venkateswarlu;P. Rani;K. Swapna;Sk. Mahamuda;A. S. Rao
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文献类型：
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作者：
C. Sumalatha;Ramachari Doddoji;M. Venkateswarlu;P. Rani;K. Swapna;Sk. Mahamuda;A. S. Rao
为了实现Dy 3+离子的白色发光，采用熔融淬冷技术制备了ZnO + Bi 2 O3 + BaF 2 + B2 O3 + TeO 2（ZnBiBaBFTe）基质玻璃。通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、紫外-可见吸收光谱、发射光谱和衰减时间等测试手段，系统地研究了它们的结构和光谱性质。利用由吸收光谱得到的Judd-Ofelt（JO）参数（Ωλ）计算了Dy ~（3+）离子4F_（9/2）能级的辐射参数。计算了玻璃的间接允许跃迁（αh λ）1/2和直接允许跃迁（αh λ）2的光学带隙能。在386 nm激发下，Dy 3+：ZnBiBaBFTe玻璃的发射光谱在575 nm（4F 9/2→ 6 H13/2）和481 nm（4F 9/26 H15/2）处出现两个强发射峰。在Dy 3+浓度为1.0 mol%时，4F 9/2→ 6 H13/2跃迁的发射强度最高，结合寿命测量，得到了受激发射截面（25.2 × 10− 22 cm 2）、增益带宽（5.86 × 10− 28 cm 3）和良好的量子效率（74.2%）的光谱参数。此外，通过调节ZnBiBaBFTe基质玻璃中Dy 3+离子的浓度，可以实现具有CIE坐标的白色光。Dy 3+掺杂的ZnBiBaBFTe玻璃具有高效的光谱值和可实现的白色照明，在激光照明器件中具有潜在的应用前景。
The ZnO + Bi2O3+ BaF2+ B2O3+ TeO2(ZnBiBaBFTe) host glass was prepared by melt quenching technique with the aim of achieving white light emission from Dy3+ions. Their structural and spectroscopic properties were systemically investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Visible absorption, emission spectra and decay times. Judd-Ofelt (JO) parameters (Ωλ) evaluated from absorption spectrum were utilized to calculate the radiative parameters for4F9/2level of Dy3+ions. The optical band gap energy of as-prepared glasses were calculated for the indirect, (αhυ)1/2and direct, (αhυ)2 allowed transitions. The emission spectra of Dy3+:ZnBiBaBFTe glasses showed two intense peaks at 575 nm (4F9/2→6H13/2) and 481 nm (4F9/26H15/2) upon 386 nm excitation. The highest emission intensity was observed at 1.0 mol% of Dy3+for4F9/2→6H13/2transition and the results are used in conjunction with lifetime measurements to derive spectroscopic parameters for the stimulated emission cross-section (25.2 × 10−22cm2), gain bandwidth (5.86 × 10−28cm3), and favourable quantum efficiency (74.2%). Moreover, white light can be realized with a CIE coordinates by adjusting the concentration of Dy3+ions in ZnBiBaBFTe host glass. Efficient spectroscopic values and realizable white lighting in Dy3+-doped ZnBiBaBFTe glasses may have potential applications in laser illumination devices.