Manganese-Doped Ag2S-ZnS Heteronanostructures

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• 作者：Shuling Shen ; Yejun Zhang ; Yongsheng Liu ; Long Peng ; Xueyuan Chen ; Qiangbin Wang
• 刊名：Chemistry of Materials
• 出版年：2012
• 出版时间：June 26, 2012
• 年：2012
• 卷：24
• 期：12
• 页码：2407-2413
• 全文大小：475K
• 年卷期：v.24,no.12(June 26, 2012)
• ISSN：1520-5002

文摘

Doping semiconductor nanocrystals and integrating disparate components together are two effective ways for modulating the optical properties of semiconductor nanocrystals. For the first time, we successfully synthesized Mn-doped Ag₂S-ZnS heteronanostructures (HNSs) by combining these two strategies together. The obtained Mn-doped Ag₂S-ZnS HNSs exhibit multicolor emissions of blue, orange, and near-infrared (NIR), in which the blue emission originates from ZnS trap state, the orange emission is induced by the ⁴T₁鈥?sup>6A₁ transition in Mn²⁺ dopant, and the NIR emission is attributed to the band gap emission of Ag₂S. Reaction temperature-dependent and Mn²⁺ dopant concentration-dependent optical properties, as well as the growth kinetics of Ag₂S-ZnS HNSs during doping process, were systemically studied to achieve the desirable optical properties and preserve well-defined HNSs simultaneously. We expect that the prepared Mn-doped Ag₂S-ZnS HNSs with tunable multicolor emissions will create numerous opportunities for potential applications in bioimaging and optoelectronic devices, and the facile methodology modulating Ag₂S-ZnS HNSs with desirable properties will be general and be ready to other complex semiconductor nanostructures.

Keywords:

manganese dopant; Ag₂S; ZnS; heteronanostructures; multicolor emissions