Optical properties of the zinc-tellurite glasses doped with Cr3+ ions
Optical properties of the zinc-tellurite glasses doped with Cr3+ ions
复制标题
DOI：
10.1016/j.jnoncrysol.2017.08.025
复制
发表时间：
2018-01
影响因子：
3.5
通讯作者：
E. V. Zamyatina;V. Karzanov;O. Zamyatin
中科院分区：
文献类型：
--
作者：
E. V. Zamyatina;V. Karzanov;O. Zamyatin
以原碲酸、硝酸锌为原料合成了含铜ZnO-TeO 2玻璃，并对合成的玻璃进行了硝酸铜掺杂。测量了所有玻璃样品的EPR谱和宽透明范围内的光谱。的自旋哈密顿参数的值表明，在玻璃中的Cu 2+离子存在于八面体配位与一些三角畸变。计算了分子轨道成键参数，发现与玻璃中Cu ~（2+）浓度无关。掺杂玻璃的透射光谱在820 nm处出现一个单一的宽带，归属于2B 1g → 2B 2g，2B 1g → 2 Eg和2B 1g → 2A 1g电子跃迁。计算了玻璃样品在310-2800 nm范围内Cu 2+离子的比吸收系数的光谱依赖性，发现在820 nm处的比吸收系数为（103 ± 1）cm− 1/（wt%），在0.5-2.8 μm范围内的积分吸收系数为（63 ± 2）cm− 2/（ppm wt）。根据光学数据计算了光学能隙、乌尔巴赫能量、金属化准则和截止波长等光学参数。观察到光学带隙随着铜含量浓度的增加而减小。
Copper-containing ZnO–TeO2glasses were synthesized using orthotelluric acid, zinc nitrate and the formed batch was doped with copper nitrate. EPR and optical spectra in a wide transparency range from were measured for all glass samples. The values of the spin-Hamiltonian parameters indicate that the Cu2 +ions in the glasses are present in octahedral coordination with some trigonal distortion. The molecular orbital bonding parameters have been calculated and were found to be independent of Cu2 +concentration in glasses. The optical transmittance spectra of doped glasses show a single broad band at 820 nm, which was assigned to the overlapping2B1g→2B2g,2B1g→2Egand2B1g→2A1gelectronic transitions. The spectral dependence of the specific absorption coefficient of Cu2 +ions was calculated for glass samples in the range of 310–2800 nm and was found that the specific absorption coefficient at 820 nm is (103 ± 1) cm− 1/(wt%) and the integral absorption coefficient in the range 0.5–2.8 μm is (63 ± 2) cm− 2/(ppm wt). From the optical data some optical parameters such as the optical energy gap, Urbach energy, metallization criterion and the cut-off wavelength were calculated. It is observed that the optical band gap decreases with an increase in concentration of copper content.