Abstract

In this work, multi wall carbon nanotube (MWCNT) doped borate glass has been successfully developed by melt quenching technique with the chemical composition 67.5B₂O₃-20ZnO-12Gd₂O₃-Er₂O₃-0.5MWCNT. Several peaks observed from absorption spectra due to transition from ⁴I_15/2 as a ground state into several states i.e. ⁴G_11/2, ²G_9/2, ⁴F_7/2, ⁴F_5/2, ²H_11/2,⁴S_3/2, ⁴F_9/2, ⁴I_11/2, and ⁴I_13/2. The sample shows a strong emission in 1536 nm because of ⁴I_13/2→⁴I_15/2 transition under 520 nm wavelength excitation. Emission around 402 nm and 471 nm under 270 nm excitation could be the indication for presence of MWCNT. The sample exhibits NIR to NIR up-conversion under 1500 nm excitation. Absorption data have been used to calculate optical band gap energy through Tauc plot method. This study shows that MWCNT doped borate glass could be a promising material for solid state application in NIR region.

摘要

在这项工作中，通过熔融淬火技术成功地开发了多壁碳纳米管（MWCNT）掺杂硼酸盐玻璃，其化学成分为67.5B ₂ O ₃ -20ZnO-12Gd ₂ O ₃ -Er ₂ O ₃ -0.5MWCNT。几个峰从吸收光谱观察到由于过渡从⁴我_15/2作为接地状态变为几种状态，即⁴ ģ _11/2，² ģ _9/2，⁴ ˚F _7/2，⁴ ˚F _5/2，² ħ _{11 / 2}，⁴小号_3/2，⁴ ˚F _9/2，⁴我_11/2，和⁴我_13/2。该示例显示了在1536纳米的强发射，因为⁴我_13/2 → ⁴我_15/2过渡下520nm的波长激发。在270 nm激发下402 nm和471 nm附近的发射可能表明存在MWCNT。样品在1500 nm激发下表现出NIR到NIR的上转换。吸收数据已被用于通过Tauc曲线法计算光学带隙能量。这项研究表明，MWCNT掺杂的硼酸盐玻璃可能是近红外固态应用的有前途的材料。