Microwave Induced Center-Doping of Transition Metals Ions in Aqueous CdS NCs with Special Optical Properties

Title:Microwave Induced Center-Doping of Transition Metals Ions in Aqueous CdS NCs with Special Optical Properties

Volume: 2 Issue: 1

Author(s): Yan Liu, Wei Zhu, Xiao Bai, Tingting Li, Mingqiang Zou, Mingqiang Zou, Jinfeng Li, Qihui Shen and Xiaoyang Liu

Affiliation:

Keywords: CdS, doping, microwave, nanocrystals, transition metal ions.

Abstract: Under microwave irradiation, we systematically studied the formation of transition metal ions (TM), Ag⁺, Mn²⁺, Cu²⁺, Fe²⁺, Co²⁺ and Ni²⁺, doped CdS semiconductor nanocrystals in a pure water solution. The center-doping strategy is essential for achieving efficient internal-doping to improve the optical properties and stability of doped nanocrystals. The resulting TM doped nanocrystals have a high photoluminescence quantum yield (~ 60%) and an amazingly large range of the visible spectrum (480 ~ 650 nm). For Mn²⁺ doped CdS nanocrystals, significant high photoluminescence quantum yield, between 20% and 50% even at more than 600 nm, was achieved and there is potential for them to be directly used as a consummate toner for multicolor sensing and encoding without ligand exchange. Highly emissive-doped nanocrystals synthesized under designed conditions have been found to have excellent stability; samples could be stored for months without precipitation. In practice, this approach has great potential to promote the metal doping of various semiconductor nanocrystals to realize the specific advantages of doped nanocrystals in water solution.

Cite this article as:

Liu Yan, Zhu Wei, Bai Xiao, Li Tingting, Zou Mingqiang, Zou Mingqiang, Li Jinfeng, Shen Qihui and Liu Xiaoyang, Microwave Induced Center-Doping of Transition Metals Ions in Aqueous CdS NCs with Special Optical Properties, Current Microwave Chemistry 2015; 2 (1) . https://dx.doi.org/10.2174/221333560201150212101808