Tuning the Energy Transfer Efficiency between Ce~(3+) and Ln~(3+) Ions (L_n=T_m, S_m, T_b, D_y) by Controlling the Crystal Phase of NaYF_4 Nanocrystals

Venkata N. K. B. Adusumalli; Heramba V. S. R. M. Koppisetti; Sagar Ganguli; Shyam Sarkar; Venkataramanan Mahalingam

首页> 外文期刊>Chemistry: A European journal >Tuning the Energy Transfer Efficiency between Ce~(3+) and Ln~(3+) Ions (L_n=T_m, S_m, T_b, D_y) by Controlling the Crystal Phase of NaYF_4 Nanocrystals

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Tuning the Energy Transfer Efficiency between Ce~(3+) and Ln~(3+) Ions (L_n=T_m, S_m, T_b, D_y) by Controlling the Crystal Phase of NaYF_4 Nanocrystals

机译：通过控制Nayf_4纳米晶体的晶相来调节Ce〜（3+）和Ln〜（3+）离子（L_N = T_M，S_M，T_B，D_Y）之间的能量转移效率

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NaYF_4 is a superior host matrix to study the luminescence properties of lanthanide (Ln~(3+)) ions. Ln~(3+) ions in hexagonal-phase NaYF_4 (b-phase) nanocrystals (NCs) exhibit strong luminescence via an upconversion process compared to cubic NaYF_4 (a-phase) NCs. However, in Ce~(3+) /Ln~(3+)-doped NaYF_4 NCs (L_n=T_m, T_b, S_m, D_y) the a-phase NaYF_4 NCs shows strong luminescence compared to their counterpart b-phase NCs despite the latter being much larger in size. This is attributed to comparatively large overlap between Ce~(3+) ions emission band with excited energy levels of those Ln~(3+) ions in α-phase compared to β-phase NCs. This difference is attributed to different crystal-field splitting of Ce~(3+) ions 4f-5d band in different crystal environments of the a-phase (cubic crystal field environment) and b-phase (trigonal prismatic with equatorials crystal field environment) NaYF_4 NCs with respect to their barycenter. The enhanced luminescence from a-phase NaYF_4 NCs is advantageous as they are prepared at a relatively lower temperature and shorter reaction times compared to b-NaYF_4 NCs.

机译：Nayf_4是高级宿主基质，用于研究镧系元素的发光性质（LN〜（3+））离子。与立方NayF_4（A相）NC相比，六方相NaYF_4（B相）纳米晶体（B相）纳米晶体（NCS）的离子纳米晶体（NCS）具有强烈的发光。然而，在CE〜（3+）/ ln〜（3 +） - 掺杂Nayf_4 ncs（l_n = t_m，t_b，s_m，d_y），A-阶段Nayf_4 ncs显示出与他们的对应B相NCS相比的强发光，尽管如此后者的大小要大得多。这归因于CE〜（3+）离子发射带之间的相对大的重叠，与α-阶段的那些LN〜（3+）离子的激发能量水平与β相NCs相比。这种差异归因于A相（立方晶场环境）和B相的不同晶体环境中Ce〜（3+）离子4f-5d带的不同晶场分裂，（三角形棱镜与赤道晶体场环境） Nayf_4 NCS关于他们的重心。来自A相NayF_4NCS的增强的发光是有利的，因为与B-NayF_4 NC相比，它们在相对较低的温度和较短的反应时间中制备。

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来源
《Chemistry: A European journal》 |2017年第5期|共7页
作者
Venkata N. K. B. Adusumalli; Heramba V. S. R. M. Koppisetti; Sagar Ganguli; Shyam Sarkar; Venkataramanan Mahalingam;
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作者单位

Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur West Bengal 741252 (India);

Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur West Bengal 741252 (India);

Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur West Bengal 741252 (India);

Department of Chemistry Ananda Mohan College 102/1 Raja Rammohan Sarani Kolkata 700009 W.B. (India);

Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur West Bengal 741252 (India);

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正文语种 eng
中图分类应用化学;
关键词
energy transfer; lanthanides; luminescence; phase change; upconversion;

机译：能量转移;镧系;发光;相变;上传;

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1. Tuning the Energy Transfer Efficiency between Ce~(3+) and Ln~(3+) Ions (L_n=T_m, S_m, T_b, D_y) by Controlling the Crystal Phase of NaYF_4 Nanocrystals [J] . Venkata N. K. B. Adusumalli, Heramba V. S. R. M. Koppisetti, Sagar Ganguli, Chemistry: A European journal . 2017,第5期

机译：通过控制Nayf_4纳米晶体的晶相来调节Ce〜（3+）和Ln〜（3+）离子（L_N = T_M，S_M，T_B，D_Y）之间的能量转移效率
2. Interface-assisted ionothermal synthesis, phase tuning, surface modification and bioapplication of Ln~(3+)-doped NaGdF4 nanocrystals [J] . Qiang Ju, Paul S. Campbell, Anja-Verena Mudring Journal of Materials Chemistry, B. materials for biology and medicine . 2013,第2期

机译：Ln〜（3+）掺杂的NaGdF4纳米晶体的界面辅助电热合成，相调控，表面改性和生物应用
3. The Size Confinement Effect for Ln~(3+) (Ln = Tm or Eu) Concentration Quenching and Energy Transfer in Y_2O_3 Nanocrystals [J] . Changwen Wang, Qingyu Meng Journal of nanoscience and nanotechnology . 2014,第5期

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4. Optical Temperature Sensing of Core-shell Structured NaYF_4:Yb~(3+), Er~(3+)@NaYF_4 Nanocrystals with Different Shell Thickness [C] . Dongdong Li, Qiyue Shao, Yan Dong, International Conference on Sensors, Measurement and Intelligent Materials . 2015

机译：光学温度传感核心壳结构Nayf_4：YB〜（3+），ER〜（3 +）@ Nayf_4纳米晶体，具有不同的外壳厚度
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机译：{LnCu5} 3+（Ln = GdDy和Ho）15-金属lacrown-5配合物的晶体结构和同型EuIII类似物的重新评估
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机译：Lacl sub 3单晶中Bk exp 3 +，CF exp 3+和es exp 3+离子的荧光和激发光谱

Tuning the Energy Transfer Efficiency between Ce~(3+) and Ln~(3+) Ions (L_n=T_m, S_m, T_b, D_y) by Controlling the Crystal Phase of NaYF_4 Nanocrystals

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