A two-step method to synthesize water-dispersible Mn:ZnSe/ZnO core/shell quantum dots with pure dopant emission

作者：Xu Xiaojing; Qi Zhengqing; Zhao Zengxia; Wang Chunlei; Lu Changgui; Xu Shuhong^*; Cui Yiping

来源：New Journal of Chemistry, 2015, 39(11): 8818-8824.

DOI：10.1039/c5nj01725d

In this work, water-dispersible Mn:ZnSe/ZnO core/shell quantum dots (QDs) with pure dopant emission were prepared via a two-step method. Compared with the traditional organometallic approach, this two-step method has many advantages, such as using low-cost and non-toxic chemicals, low reaction temperature and simple operation. Moreover, the obtained Mn: ZnSe/ZnO core/shell QDs also showed superior properties to those prepared by the aqueous solution synthesis, such as narrow emission and good monodispersity. The influence of the storage time of Mn: ZnSe QDs in organic medium, the amount of MPA and temperature during the period of ZnO shell deposition on the photo-luminescence (PL) properties was investigated. Under optimal conditions, MPA-capped Mn: ZnSe/ZnO QDs with an average diameter of 2.6 nm and a dopant PL quantum yield (QY) of 30% in water were produced.

• 出版日期2015
• 单位东南大学