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Origin of Radiation-Induced Darkening in Yb3+/Al3+/P5+-Doped Silica Glasses: Effect of the P/Al Ratio
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2018-02-12 00:00:00 , DOI: 10.1021/acs.jpcb.7b12587 Chongyun Shao 1, 2 , Jinjun Ren 1 , Fan Wang 1, 2 , Nadege Ollier 3 , Fenghou Xie 1, 2 , Xuyang Zhang 1, 2 , Lei Zhang 1 , Chunlei Yu 1 , Lili Hu 1
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2018-02-12 00:00:00 , DOI: 10.1021/acs.jpcb.7b12587 Chongyun Shao 1, 2 , Jinjun Ren 1 , Fan Wang 1, 2 , Nadege Ollier 3 , Fenghou Xie 1, 2 , Xuyang Zhang 1, 2 , Lei Zhang 1 , Chunlei Yu 1 , Lili Hu 1
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Yb3+/Al3+/P5+-co-doped silica glasses with different P/Al ratios were prepared using the sol–gel method combined with high-temperature sintering. The evolution of composition-dependent color centers caused by X-ray irradiation in these glasses was correlated with their structural changes, which are controlled by the P/Al ratio. Nuclear magnetic resonance (NMR) and Raman spectra have been used to characterize the glass network structure, and advanced pulse electron paramagnetic resonance (EPR) has been employed to study the local coordination atomic structures of Yb3+ ions in pristine glasses as a function of the P/Al ratio. Si- (Si-E′), Al- (Al-E′, Al-ODC, AlOHC), P- (P1, P2, POHC), and Yb-related (Yb2+) color centers in irradiated glasses have been observed and explained by optical absorption and continuous wave-EPR spectroscopies. The formation mechanisms of these centers, the structural models of glasses, and the relationship between them were proposed. Direct evidence confirms that the formation of Yb2+ ions induced by radiation is highly dependent on the coordination environment of Yb3+ ions in glasses. In addition, the glass network structure significantly affects the generation of oxygen hole color centers (AlOHCs/POHCs) caused by radiation. These results are useful in understanding the microstructural origin and the suppression mechanism of the radiodarkening effect by phosphorus co-doping in Yb3+-doped silica fibers.
中文翻译：
掺Yb 3+ / Al 3+ / P 5+的石英玻璃中辐射致变黑的根源：P / Al比的影响
采用溶胶-凝胶法结合高温烧结法制备了不同P / Al比的Yb 3+ / Al 3+ / P 5+ -共掺杂石英玻璃。在这些玻璃中，由X射线辐照引起的与成分有关的色心的演变与它们的结构变化相关，该结构变化由P / Al比率控制。核磁共振（NMR）和拉曼光谱已被用来表征玻璃网络结构，先进的脉冲电子顺磁共振（EPR）已被用于研究原始玻璃中Yb 3+离子的局部配位原子结构与功能的关系。 P / Al比。Si-（Si-E'），Al-（Al-E'，Al-ODC，AlOHC），P-（P 1，P 2，POHC）和受辐照玻璃中与Yb相关（Yb 2+）的色心，已经通过光学吸收和连续波EPR光谱学进行了观察和解释。提出了这些中心的形成机理，玻璃的结构模型以及它们之间的关系。直接证据证实，辐射诱导的Yb 2+离子的形成高度依赖于玻璃中Yb 3+离子的配位环境。另外，玻璃网络结构显着影响由辐射引起的氧孔色心（AlOHCs / POHCs）的产生。这些结果有助于了解磷共掺杂在Yb 3+中的微观结构起源和对放射性暗化效应的抑制机理。掺杂的二氧化硅纤维。
更新日期：2018-02-12
中文翻译：
掺Yb 3+ / Al 3+ / P 5+的石英玻璃中辐射致变黑的根源：P / Al比的影响
采用溶胶-凝胶法结合高温烧结法制备了不同P / Al比的Yb 3+ / Al 3+ / P 5+ -共掺杂石英玻璃。在这些玻璃中，由X射线辐照引起的与成分有关的色心的演变与它们的结构变化相关，该结构变化由P / Al比率控制。核磁共振（NMR）和拉曼光谱已被用来表征玻璃网络结构，先进的脉冲电子顺磁共振（EPR）已被用于研究原始玻璃中Yb 3+离子的局部配位原子结构与功能的关系。 P / Al比。Si-（Si-E'），Al-（Al-E'，Al-ODC，AlOHC），P-（P 1，P 2，POHC）和受辐照玻璃中与Yb相关（Yb 2+）的色心，已经通过光学吸收和连续波EPR光谱学进行了观察和解释。提出了这些中心的形成机理，玻璃的结构模型以及它们之间的关系。直接证据证实，辐射诱导的Yb 2+离子的形成高度依赖于玻璃中Yb 3+离子的配位环境。另外，玻璃网络结构显着影响由辐射引起的氧孔色心（AlOHCs / POHCs）的产生。这些结果有助于了解磷共掺杂在Yb 3+中的微观结构起源和对放射性暗化效应的抑制机理。掺杂的二氧化硅纤维。
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