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1. 暨南大学 化学系,广东 广州,510632
2. 暨南大学 纳米化学研究所,广东 广州,510632
收稿日期:2011-03-25,
修回日期:2011-05-24,
网络出版日期:2011-07-22,
纸质出版日期:2011-07-22
移动端阅览
邹少瑜, 肖全兰, 邓小玲, 彭文芳, 刘关喜, 孟建新. In<sub>2</sub> O<sub>3</sub> ∶ Ho<sup>3+</sup> ,Yb<sup>3+</sup>纳米晶的制备与上转换发光[J]. 发光学报, 2011,32(7): 655-659
ZOU Shao-yu, XIAO Quan-lan, DENG Xiao-ling, PENG Wen-fang, LIU Guan-xi, MENG Jian-xin. Synthesis and Upconversion Luminescence of In<sub>2</sub>O<sub>3</sub> ∶ Ho<sup>3+</sup> ,Yb<sup>3+</sup> Nanocrystals[J]. Chinese Journal of Luminescence, 2011,32(7): 655-659
邹少瑜, 肖全兰, 邓小玲, 彭文芳, 刘关喜, 孟建新. In<sub>2</sub> O<sub>3</sub> ∶ Ho<sup>3+</sup> ,Yb<sup>3+</sup>纳米晶的制备与上转换发光[J]. 发光学报, 2011,32(7): 655-659 DOI: 10.3788/fgxb20113207.0655.
ZOU Shao-yu, XIAO Quan-lan, DENG Xiao-ling, PENG Wen-fang, LIU Guan-xi, MENG Jian-xin. Synthesis and Upconversion Luminescence of In<sub>2</sub>O<sub>3</sub> ∶ Ho<sup>3+</sup> ,Yb<sup>3+</sup> Nanocrystals[J]. Chinese Journal of Luminescence, 2011,32(7): 655-659 DOI: 10.3788/fgxb20113207.0655.
以乙二醇为溶剂
采用低温溶剂热法制备了Ho
3+
/Yb
3+
共掺杂In
2
O
3
纳米晶。利用X射线晶体衍射(XRD)、透射电子显微镜(TEM)对粒子的结构和形貌进行表征
结果表明
合成的样品为纯的立方相In
2
O
3
颗粒尺寸约为30 nm。通过上转换发光(UCL)光谱研究了粒子的上转换发光性质
在980 nm半导体激光激发下
In
2
O
3
∶ Ho
3+
Yb
3+
纳米晶发射出强的绿色和弱的红色上转换发光
分别归属于Ho
3+
离子(
5
F
4
5
S
2
)
5
I
8
和
5
F
5
5
I
8
跃迁。研究了不同Ho
3+
和Yb
3+
离子掺杂浓度对上转换发光性能的影响
确定了Ho
3+
和Yb
3+
最佳掺杂摩尔分数分别为3%和4%。双对数曲线显示
绿光和红光的发射过程均为双光子吸收过程。对样品的上转换发光机制进行了初步讨论。
In
2
O
3
∶ Ho
3+
Yb
3+
nanocrystals with efficient upconversion luminescence were prepared by solvent thermal method using glycol as solvent. The samples were characterized by X-ray diffraction(XRD)
transmission electron microscopy (TEM)
diffuse reflectance spectra
and upconversion luminescence spectra. XRD results indicate that the products are cubic phase. TEM images show that the In
2
O
3
∶ Ho
3+
Yb
3+
nanoparticles are sphere shape with an average size of 30 nm. The diffuse reflectance spectra give four narrow bands at 448
538
644 and 975 nm
corresponding to the
5
I
8
5
G
6
(448 nm)
5
I
8
5
S
2
/
5
F
4
(538 nm)
5
I
8
5
F
5
(644 nm) transitions of Ho
3+
ions and
2
F
7/2
2
F
5/2
(975 nm) transition of Yb
3+
ions. Under the excitation of 980 nm
In
2
O
3
∶ Ho
3+
Yb
3+
nanocrystals can emit strong green emission and weak red emission
corresponding to (
5
F
4
5
S
2
)
5
I
8
5
F
5
5
I
8
transitions of Ho
3+
. Upconversion luminescence of In
2
O
3
∶ Ho
3+
Yb
3+
nanocrystals codoped with different concentrations of Ho
3+
and Yb
3+
ions were investigated to improve the luminescene intensity. The results show that the strongest upconversion emission can be achieved at a Ho
3+
mole fraction of 3% and an Yb
3+
mole fraction of 4%. The ln
I
-ln
P
curves show that both the green and red emissions are double-photon process and the possible mechanism is proposed.
Dou Jingtao, Hou Yanbing. Upconversion luminescence of ZBLAN ∶ Yb3+,Tm3+ co-excited by double-frequency with both 808 and 980 nm lasers [J]. Chin. J. Lumin. (发光学报), 2008, 29 (1):85-88 (in Chinese).[2] Chen Huan, Chuai Xiaohong, Wang Lili, et al. Synthesis and optical properties of water soluble upconversion NaYF4 ∶ Yb,Tm nanoparticles [J]. Chin. J. Lumin. (发光学报), 2010, 31 (4):85-88 (in Chinese).[3] Ren Qi, Dai Rucheng, Shen Yuhua, et al. Color design based on upconversion luminescence of NaYF4 ∶ Yb3+ ,Er3+ [J]. Chin. J. Lumin. (发光学报), 2010, 31 (1):69-74 (in Chinese).[4] Liu Yongjuan, Zhang Xiaodan, Wang Dongfeng, et al. Optimized solvent-thermal preparation of NaYF4 ∶ Yb3+ , Er3+ up-conversion nanoparticles for application in solar cells [J]. Chin. J. Materials Research (材料研究学报), 2009, 23 (2):123-126 (in Chinese).[5] Li Shuquan, Lin Jianming, Wu Jihuai, et al. Applications of upconversion luminescence in dye sensitized solar cell [J]. Chin. J. Inorganic Chemistry (无机化学学报), 2009, 25 (1):60-64 (in Chinese).[6] Li Shuquan, Lin Jianming, Wu Jihuai, et al. Applications of upconversion luminescence of Ho3+ in dye sensitized solar cell [J]. J. Functional Materials (功能材料), 2009, 40 (1):82-85 (in Chinese).[7] Pan Zhengwei, Dai Zurong, Wang Zhonglin. Nanobelts of semiconducting oxides [J]. Science, 2001, 291 (5510):1947-1949.[8] Dong Hongxing, Yang Heqing, Yu Jie, et al. In situ synthesis and photoluminescence properties of In2O3 nanocones with different diameters on the surface of indium grains [J]. Acta Chimica Sinica (化学学报), 2008, 66 (13):1604-1610 (in Chinese).[9] Sheng Y Q, Xu L L, Liu J, et al. Improving monochromaticity of upconversion luminescence by codoping Eu3+ ions in Y2O3 ∶ Ho3+ ,Yb3+ nanocrystals [J]. J. Lumin., 2009, 130 (2):338-341.[10] Zhang Jian, An Liqiong, Wang Shiwei. Preparation and upconversion luminescence of Y2O3 ∶ Yb3+ ,Ho3+ nanocrystalline powders coated with SiO2 [J]. J. Alloys and Compounds, 2009, 471 (1-2):201-203.[11] Patra A, Friend C S, Kapoor R, et al. Fluorescence upconversion properties of Er3+-doped TiO3 and nanocrystallites [J]. Chem. Mater., 2003, 15 (19):3650-3655.[12] Pandozzi F, Vetrone F, Boyer J C, et al. A spectroscopic analysis of blue and ultraviolet upconverted emissions from Gd3Ga5O12 ∶ Tm3+ , Yb3+ nanocrystals [J]. J. Phys. Chem. B, 2005, 109 (37):17400-17405.[13] Zhang Xianghua, Yang Siyang, Ding Qinglei, et al. The upconversion luminescence characteristics of Ho3+ /Yb3+ codoped ZrO2-ZnO [J]. Spectroscopy and Spectral Analysis (光谱学与光谱分析), 2010, 30 (6):1456-1459 (in Chinese).
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