期刊
ACS CENTRAL SCIENCE
卷 2, 期 1, 页码 32-39出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.5b00327
关键词
-
Transition metal doped semiconductor nanocrystals (d-dots) possess fundamentally different emission properties upon photo-or electroexcitation, which render them as unique emitters for special applications. However, in comparison with intrinsic semiconductor nanocrystals, the potential of d-dots has been barely realized, because many of their unique emission properties mostly rely on precise control of their photoluminescence (PL) decay dynamics. Results in this work revealed that it would be possible to obtain bright d-dots with nearly single-exponential PL decay dynamics. By tuning the number of Mn2+ ions per dot from similar to 500 to 20 in Mn2+ doped ZnSe nanocrystals (Mn: ZnSe d-dots), the single-exponential PL decay lifetime was continuously tuned from similar to 50 to 1000 mu s. A synthetic scheme was further developed for uniform and epitaxial growth of thick ZnS shell, similar to 7 monolayers. The resulting Mn: ZnSe/ZnS core/shell d-dots were found to be essential for necessary environmental durability of the PL properties, both steady-state and transient ones, for the d-dot emitters. These characteristics combined with intense absorption and high PL quantum yields (70 +/- 5%) enabled greatly simplified schemes for various applications of PL lifetime multiplexing using Mn: ZnSe/ZnS core/shell d-dots.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据