Li+ ion doping: an approach for improving the crystallinity and upconversion emissions of NaYF4:Yb3+, Tm3+ nanoparticles

被引：246

作者：

Zhao, Chengzhou ^{[1
,2
]}

Kong, Xianggui ^{[1
]}

Liu, Xiaomin ^{[1
]}

Tu, Langping ^{[1
,2
]}

Wu, Fei ^{[1
,2
]}

Zhang, Youlin ^{[1
]}

Liu, Kai ^{[1
,2
,3
]}

Zeng, Qinghui ^{[1
]}

Zhang, Hong ^{[3
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Amsterdam, Vant Hoff Inst Mol Sci, NL-1098 XH Amsterdam, Netherlands

来源：

NANOSCALE | 2013年 / 5卷 / 17期

关键词：

NANOCRYSTALS; LUMINESCENCE; LANTHANIDE; INTENSITIES; PHASE;

D O I：

10.1039/c3nr01916k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The application of upconversion nanoparticles (UCNPs), especially in vivo, has so far been hampered by their relatively low upconversion efficiency. In this work, a strategy of Li+ doping was revisited with the aim of enhancing UV to blue UC luminescence of NaYF4:Yb3+, Tm3+ nanocrystals. We have demonstrated that the short wavelength UC emission bands were indeed significantly enhanced. Compared to lithium-free NaYF4:Yb3+, Tm3+, the UC emission intensities of 452 nm and 479 nm of the NPs co-doped with 7 mol% Li+ ions were increased by 8 and 5 times, respectively. The mechanism of the enhancement was discussed and the improvement of the nanoparticles' crystallinity and the distortion of the local symmetry around the Tm3+ ions, when the Li+ ions were introduced, were confirmed to be the origin of the improvement.

引用

页码：8084 / 8089

页数：6

共 34 条

[1] Modifying the Size and Shape of Monodisperse Bifunctional Alkaline-Earth Fluoride Nanocrystals through Lanthanide Doping [J].

Chen, Daqin ;

Yu, Yunlong ;

Huang, Feng ;

Huang, Ping ;

Yang, Anping ;

Wang, Yuansheng .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (29) :9976-9978

[2] Two-color upconversion in rare-earth-ion-doped ZrO2 nanocrystals [J].

Chen, G. Y. ;

Zhang, Y. G. ;

Somesfalean, G. ;

Zhang, Z. G. ;

Sun, Q. ;

Wang, F. P. .

APPLIED PHYSICS LETTERS, 2006, 89 (16)

[3] Upconversion emission enhancement in Yb3+/Er3+-codoped Y2O3 nanocrystals by tridoping with Li+ ions [J].

Chen, Guanying ;

Liu, Haichun ;

Liang, Huijuan ;

Somesfalean, Gabriel ;

Zhang, Zhiguo .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (31) :12030-12036

[4] Upconversion emission enhancement in Er3+/Yb3+-codoped BaTiO3 nanocrystals by tridoping with Li+ ions [J].

Chen, Xiangqun ;

Liu, Zhikai ;

Sun, Qiu ;

Ye, Mao ;

Wang, Fuping .

OPTICS COMMUNICATIONS, 2011, 284 (07) :2046-2049

[5] Enhanced upconversion emission in Yb3+ and Er3+ codoped NaGdF4 nanocrystals by introducing Li+ ions [J].

Cheng, Qian ;

Sui, Jiehe ;

Cai, Wei .

NANOSCALE, 2012, 4 (03) :779-784

[6] Effect of Li+-ion on enhancement of photoluminescence in Gd2O3:Eu3+ nanophosphors prepared by combustion technique [J].

Dhananjaya, N. ;

Nagabhushana, H. ;

Nagabhushana, B. M. ;

Rudraswamy, B. ;

Shivakumara, C. ;

Chakradhar, R. P. S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (05) :2368-2374

[7] Transparent, polycrystalline upconverting nanoceramics: Towards 3-D displays [J].

Hinklin, Thomas R. ;

Rand, Stephen C. ;

Laine, Richard M. .

ADVANCED MATERIALS, 2008, 20 (07) :1270-+

[8] Synthesis and Characterization of Highly Efficient Near-Infrared Upconversion Sc3+/Er3+/Yb3+ Tridoped NaYF4 [J].

Huang, Qingming ;

Yu, Jianchang ;

Ma, En ;

Lin, Kaiming .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (10) :4719-4724

[9] Er-Yb Codoped Ferroelectrics for Controlling Visible Upconversion Emissions [J].

Huang, Tung-Ching ;

Hsieh, Wen-Feng .

JOURNAL OF FLUORESCENCE, 2009, 19 (03) :511-516

[10] OPTICAL ABSORPTION INTENSITIES OF RARE-EARTH IONS [J].

JUDD, BR .

PHYSICAL REVIEW, 1962, 127 (03) :750-&

← 1 2 3 4 →