High-Quality Manganese-Doped Zinc Sulfide Quantum Rods with Tunable Dual-Color and Multiphoton Emissions

被引:142
作者
Deng, Zhengtao [1 ,2 ]
Tong, Ling [3 ]
Flores, Marco [2 ]
Lin, Su [1 ,2 ]
Cheng, Ji-Xin [3 ,4 ]
Yan, Hao [1 ,2 ]
Liu, Yan [1 ,2 ]
机构
[1] Arizona State Univ, Biodesign Inst, Tempe, AZ 85287 USA
[2] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA
[3] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
[4] Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
基金
美国国家科学基金会;
关键词
DOPING SEMICONDUCTOR NANOCRYSTALS; CDS/ZNS CORE/SHELL NANOCRYSTALS; CDSE NANOCRYSTALS; ZNSE NANOCRYSTALS; SHAPE CONTROL; EFFICIENT; NANORODS; EMITTERS; DOTS; MN;
D O I
10.1021/ja110996c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We report a simple, fast and green phosphine-free colloidal chemistry to synthesize high-quality wurtzite-type Mn-doped ZnS quantum rods (QRs) with tunable diameters (1.6-5.6 nm), high aspect ratios (up to 50), variable Mn doping levels (0.18-1.60%), and high quantum yields (up to 45%). The electron paramagnetic resonance spectra with modeling reveal the successful doping of paramagnetic Mn2+ ions in the host ZnS QRs. The Mn-doped ZnS QRs demonstrate tunable dual-color (orange and blue) emissions by tuning the doping levels and UV excitation wavelengths. The orange emission with long decay lifetime (3.3 ms) originates from the doped Mn2+ states, while the blue emission with fast decay lifetime (0.31 ns) is attributed to the QR surface states. The bright two- and three-photon excitation upconversion luminescence from the Mn-doped ZnS QRs have been observed using tunable near-infrared femtosecond laser. Our strategy provides a versatile route to programmably control the optical properties of anisotropic semiconductor nanomaterials, which may create new opportunities for photonic devices and bioimaging applications.
引用
收藏
页码:5389 / 5396
页数:8
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