Pradhan Narayan, Goorskey David, Thessing Jason, Peng Xiaogang
Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, USA.
J Am Chem Soc. 2005 Dec 21;127(50):17586-7. doi: 10.1021/ja055557z.
The concept, decoupling doping from nucleation and/or growth, allows us to dope nearly all nanocrystals in a given sample which is indicated by complete quenching of the host emission and bright emission from the dopants at characteristic wavelengths tunable in most parts of the visible window using a ZnSe host. In an extreme case, ZnSe coated MnSe nanocrystals (MnSe:ZnSe) emit similarly as commonly known doped nanocrystals. In comparison with CdSe nanocrystals, these alternative emitters not only are intrinsically less toxic but also show some unexpected and expected advantages: stable against thermal and environmental changes, zero reabsorption, and no Forster energy transfer. In addition to their applications to replace CdSe based nanocrystal emitters, the unique structure and properties of the doped nanocrystals are of interest for studying fundamental issues in the field.
将掺杂与成核和/或生长解耦的概念，使我们能够对给定样品中的几乎所有纳米晶体进行掺杂，这表现为主体发射完全猝灭，以及使用ZnSe主体在可见窗口大部分区域可调的特征波长处来自掺杂剂的明亮发射。在极端情况下，ZnSe包覆的MnSe纳米晶体（MnSe:ZnSe）的发射与众所周知的掺杂纳米晶体相似。与CdSe纳米晶体相比，这些替代发射体不仅本质上毒性更小，而且还展现出一些意想不到和预期的优势：对热和环境变化稳定、零重吸收且无福斯特能量转移。除了用于替代基于CdSe的纳米晶体发射体的应用之外，掺杂纳米晶体的独特结构和性质对于研究该领域的基本问题也很有意义。
