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首页> 外文期刊>RSC Advances >Spectroscopic analysis of Eu3+ doped silica–titania–polydimethylsiloxane hybrid ORMOSILs
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Spectroscopic analysis of Eu3+ doped silica–titania–polydimethylsiloxane hybrid ORMOSILs

机译：EU3 +掺杂二氧化硅 - 二亚甲基 - 聚二甲基硅氧烷杂交种子的光谱分析

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Eu ~(3+) doped silica–titania–polydimethylsiloxane hybrid ORMOSILs were synthesized via a non-hydrolytic sol–gel route. The structural and thermal analyses of the samples confirmed that the matrix structure remains unaffected by doping with different concentrations of Eu ~(3+) ions. Photoluminescence (PL) studies performed at 394 nm on Eu ~(3+) doped ORMOSILs imply that they emit broad blue host emission and the characteristic Eu ~(3+) red emissions simultaneously. Also, the samples were excited at the charge transfer (CT) band and this confirmed the existence of an energy transfer path from the host to the Eu ~(3+) ions via Ti ~(4+) –O ~(2?) –Eu ~(3+) bonds. The phonon energy of the host matrix was estimated by phonon sideband (PSB) analysis and the results were substantiated by Raman analysis. Judd–Ofelt (JO) parameters were also evaluated which give details about the local surroundings of the Eu ~(3+) ions in the system and these parameters were further used for predicting the radiative properties of ~(5) D _(0) → ~(7) F _(1,2,4) transitions of Eu ~(3+) ions. Furthermore, the quantum efficiency and CIE co-ordinates were evaluated and it was found that Eu ~(3+) doped silica–titania–polydimethylsiloxane ORMOSIL has an intense pinkish red emission with a quantum efficiency of 30.7%.
机译：通过非水解溶胶 - 凝胶途径合成Eu〜（3+）掺杂二氧化硅 - 二氧化钛 - 聚二甲基硅氧烷杂交杂交杂交杂交杂交杂交杂交杂交杂体。样品的结构和热分析证实，基质结构不受掺杂不同浓度的Eu〜（3+）离子的影响。在Eu〜（3+）掺杂的ormosils上的394nm进行的光致发光（PL）研究意味着它们同时发出广泛的蓝色宿主发射和特征EU〜（3+）的红色排放。此外，在电荷转移（CT）带中激发样品，并且这证实了通过Ti〜（4+）-O〜（2？）从宿主到Eu〜（3+）离子的能量转移路径的存在-eu〜（3+）债券。通过声子边带（PSB）分析估计了主体矩阵的声音能量，结果通过拉曼分析证实了结果。还评估了Judd-ofelt（jo）参数，其详细介绍了系统中Eu〜（3+）离子的局部周围环境，并且这些参数进一步用于预测〜（5）d _（0）的辐射性能→〜（7）F _（1,2,4）欧盟〜（3+）离子的过渡。此外，评估量子效率和CIE协调，发现Eu〜（3+）掺杂二氧化硅二甲基二甲基硅氧烷Ormosil具有强烈的粉红色发射，量子效率为30.7％。

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