Multiform La2O3: Yb3+/Er3+/Tm3+ submicro-/microcrystals derived by hydrothermal process: Morphology control and tunable upconversion luminescence properties

被引:41
作者
Li, Guogang [1 ,2 ]
Shang, Mengmeng [1 ,2 ]
Geng, Dongling [1 ,2 ]
Yang, Dongmei [1 ,2 ]
Peng, Chong [1 ,2 ]
Cheng, Ziyong [1 ,2 ]
Lin, Jun [1 ,2 ]
机构
[1] Chinese Acad Sci, State Key Lab Rare Earth Resource Utilizat, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
CHEMICAL-VAPOR-DEPOSITION; WHITE-LIGHT; YB3+ CONCENTRATION; GROWTH-MECHANISM; PHOSPHOR FILMS; FULL-COLOR; NANOCRYSTALS; LN; EMISSION; PHOTOLUMINESCENCE;
D O I
10.1039/c2ce06248h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
LaCO3OH:Ln(3+) (Ln = Yb, Er, Tm) submicro/microcrystals with a variety of novel and well-defined morphologies including triagonal or truncated triagonal-prism/plate, hexagonal prism, pine nut and sphere have been synthesized via a facile hydrothermal route. A series of controlled experiments indicate that the inherent crystal structure and the external experimental conditions such as the pH values in the initial reaction systems, the volume ratio of EG to H2O, and the dosage of CO(NH2)(2) were responsible for shape determination of the LaCO3OH products. The possible formation mechanism for these diverse architectures has been presented. After annealing at a suitable temperature, the asprepared LaCO3OH:Ln(3+) crystals were easily converted to La2O3: Ln(3+) without changing their original morphologies. A systematic study on the upconversion (UC) PL properties of La2O3:Yb3+/Er3+/Tm3+ products have been performed in detail. Under 980 nm laser diode excitation, La2O3:Yb3+, Tm3+, La2O3:Er3+ and La2O3:Yb3+, Er3+ products are mainly dominated by blue, green and red light emissions, respectively. By increasing Er3+ concentration, the La2O3:Er3+ gives yellow emission. Furthermore, the UC white light was successfully obtained in the La2O3:Yb3+/Er3+/Tm3+ system by adjusting the relative doping concentration of Yb3+, Er3+ and Tm3+. The obtained UC white light can be tuned at a wide range, and the optimal white-emitting CIE (Commission internationale de l'eclairage [International Commission on Illumination]) chromaticity coordinate is (x = 0.3259, y = 0.3187), which is very close to the standard equal energy white light (x = 0.33, y = 0.33). The strategies for color tuning of upconversion emission proposed in the current system may be helpful for other ones to achieve efficient multicolor (including white light) luminescence under 980 nm laser excitation.
引用
收藏
页码:2100 / 2111
页数:12
相关论文
共 94 条
[1]   Semiconductor clusters, nanocrystals, and quantum dots [J].
Alivisatos, AP .
SCIENCE, 1996, 271 (5251) :933-937
[2]   Size-dependent upconversion luminescence in Er3+/Yb3+-codoped nanocrystalline yttria:: Saturation and thermal effects [J].
Bai, Xue ;
Song, Hongwei ;
Pan, Guohui ;
Lei, Yanqiang ;
Wang, Tie ;
Ren, Xingguang ;
Lu, Shaozhe ;
Dong, Biao ;
Dai, Qilin ;
Fan, Libo .
JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (36) :13611-13617
[3]   Highly conducting patterned Pd nanowires by direct-write electron beam lithography [J].
Bhuvana, T. ;
Kulkarni, G. U. .
ACS NANO, 2008, 2 (03) :457-462
[4]  
Blasse G., 1994, LUMINESCENT MAT, P1, DOI [10.1007/978-3-642-79017-1_1, DOI 10.1007/978-3-642-79017-1_1, 10.1007/978-3-642-79017-11, DOI 10.1007/978-3-642-79017-11]
[5]   Absolute quantum yield measurements of colloidal NaYF4: Er3+, Yb3+ upconverting nanoparticles [J].
Boyer, John-Christopher ;
van Veggel, Frank C. J. M. .
NANOSCALE, 2010, 2 (08) :1417-1419
[6]   Up-conversion white light of Tm3+/Er3+/Yb3+ tri-doped CaF2 phosphors [J].
Cao, Chunyan ;
Qin, Weiping ;
Zhang, Jisen ;
Wang, Yan ;
Wang, Guofeng ;
Wei, Guodong ;
Zhu, Peifen ;
Wang, Lili ;
Jin, Longzhen .
OPTICS COMMUNICATIONS, 2008, 281 (06) :1716-1719
[7]   Site selective excitation in La2O3:Eu3+ nanoparticles [J].
Chang, Jianjun ;
Xiong, Sha ;
Peng, Hongshang ;
Sun, Lingdong ;
Lu, Shaozhe ;
You, Fangtian ;
Huang, Shhua .
JOURNAL OF LUMINESCENCE, 2007, 122 :844-846
[8]   Bright upconversion white light emission in transparent glass ceramic embedding Tm3+/Er3+/Yb3+:β-YF3 nanocrystals [J].
Chen, Daqin ;
Wang, Yuansheng ;
Zheng, Kelu ;
Guo, Tailiang ;
Yu, Yunlong ;
Huang, Ping .
APPLIED PHYSICS LETTERS, 2007, 91 (25)
[9]   Bright white upconversion luminescence in rare-earth-ion-doped Y2O3 nanocrystals [J].
Chen, G. Y. ;
Liu, Y. ;
Zhang, Y. G. ;
Somesfalean, G. ;
Zhang, Z. G. ;
Sun, Q. ;
Wang, F. P. .
APPLIED PHYSICS LETTERS, 2007, 91 (13)
[10]   Energy levels and optical spectroscopy of Er3+ in Gd2O3 nanocrystals [J].
Chen, Xueyuan ;
Ma, En ;
Liu, Guokui .
JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (28) :10404-10411