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Role of Dy3+ → Sm3+ energy transfer in the tuning of warm to cold white light emission in Dy3+/Sm3+ co-doped Lu3Ga5O12 nano-garnets
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2017-12-22 00:00:00 , DOI: 10.1039/c7nj04034b Haritha Pamuluri 1, 2, 3, 4 , Mamilla Rathaiah 1, 2, 3, 4 , Kadathala Linganna 5, 6, 7, 8, 9 , Chalicheemalapalli Kulala Jayasankar 1, 4, 10, 11 , Victor Lavín 12, 13, 14, 15, 16 , Vemula Venkatramu 1, 2, 3, 4
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2017-12-22 00:00:00 , DOI: 10.1039/c7nj04034b Haritha Pamuluri 1, 2, 3, 4 , Mamilla Rathaiah 1, 2, 3, 4 , Kadathala Linganna 5, 6, 7, 8, 9 , Chalicheemalapalli Kulala Jayasankar 1, 4, 10, 11 , Victor Lavín 12, 13, 14, 15, 16 , Vemula Venkatramu 1, 2, 3, 4
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Nano-crystalline lutetium gallium garnets co-doped with Dy3+ and Sm3+ ions have been synthesized via a sol–gel method and their structural, morphological and luminescence properties have been characterized. All the garnets have been crystallized in a single phase of cubic structure, with an average size of 40 nm, with coral shape morphology. Under different excitation wavelengths, the nano-garnets exhibit the strong yellow and blue emissions of Dy3+ ions, as well as the orange and red emissions of Sm3+ ions. In Dy3+/Sm3+ co-doped Lu3Ga5O12 nano-garnets, white light emission has been tuned from warm to cool by varying the concentration of Sm3+ ions, as well as the excitation wavelength. The color coordinates for 2 mol% Dy3+/10 mol% Sm3+ co-doped nano-garnets have been found to be (0.317, 0.321), quite close to ideal white light, with a correlated color temperature of 6322 K under 351 nm excitation. Moreover, decay times, multipolar interactions, and energy transfer parameters for excited states of Dy3+ and Sm3+ ions in co-doped nano-garnets have been evaluated to derive the relationship between the doping concentration and luminescence properties. These results reveal that the studied nano-garnets could be a potential candidate for white light emitting device applications.
中文翻译：
Dy 3+ / Sm 3+共掺杂的Lu 3 Ga 5 O 12纳米石榴石 中Dy 3+ →Sm 3+能量转移在从暖到冷白光发射调谐中的作用
通过溶胶-凝胶法合成了掺有Dy 3+和Sm 3+离子的纳米晶镓石榴石，并对其结构，形态和发光特性进行了表征。所有石榴石均已结晶成单相立方结构，平均大小为40 nm，具有珊瑚状的形态。在不同的激发波长下，纳米石榴石显示出Dy 3+离子的强烈的黄色和蓝色发射，以及Sm 3+离子的橙色和红色发射。In Dy 3+ / Sm 3+共掺杂Lu 3 Ga 5 O 12在纳米石榴石中，通过改变Sm 3+离子的浓度以及激发波长，可以将白光发射从暖到冷进行调节。已发现2 mol％Dy 3+ / 10 mol％Sm 3+共掺杂的纳米石榴石的色坐标为（0.317，0.321），非常接近理想的白光，并且在750℃下的相关色温为6322 K 351 nm激发。此外，Dy 3+和Sm 3+的激发态的衰减时间，多极相互作用和能量传递参数已评估了共掺杂纳米石榴石中的离子，以得出掺杂浓度与发光性能之间的关系。这些结果表明，所研究的纳米石榴石可能是发白光器件应用的潜在候选者。
更新日期：2017-12-22
中文翻译：
Dy 3+ / Sm 3+共掺杂的Lu 3 Ga 5 O 12纳米石榴石 中Dy 3+ →Sm 3+能量转移在从暖到冷白光发射调谐中的作用
通过溶胶-凝胶法合成了掺有Dy 3+和Sm 3+离子的纳米晶镓石榴石，并对其结构，形态和发光特性进行了表征。所有石榴石均已结晶成单相立方结构，平均大小为40 nm，具有珊瑚状的形态。在不同的激发波长下，纳米石榴石显示出Dy 3+离子的强烈的黄色和蓝色发射，以及Sm 3+离子的橙色和红色发射。In Dy 3+ / Sm 3+共掺杂Lu 3 Ga 5 O 12在纳米石榴石中，通过改变Sm 3+离子的浓度以及激发波长，可以将白光发射从暖到冷进行调节。已发现2 mol％Dy 3+ / 10 mol％Sm 3+共掺杂的纳米石榴石的色坐标为（0.317，0.321），非常接近理想的白光，并且在750℃下的相关色温为6322 K 351 nm激发。此外，Dy 3+和Sm 3+的激发态的衰减时间，多极相互作用和能量传递参数已评估了共掺杂纳米石榴石中的离子，以得出掺杂浓度与发光性能之间的关系。这些结果表明，所研究的纳米石榴石可能是发白光器件应用的潜在候选者。
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