Lee See Mak, Lim Hyunseob, Lee Younki, Bang Jiwon
Electronic Conversion Materials Division, Korea Institute of Ceramic Engineering and Technology, Jinju, 52828, Republic of Korea.
Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
Chemphyschem. 2019 Jul 16;20(14):1885-1889. doi: 10.1002/cphc.201900248. Epub 2019 Jun 14.
A supra-quantum dot (SQD) is a three-dimensionally assembled QD structure composed of several hundreds to thousands of QDs connected through oriented attachments. Owing to their three-dimensional interconnected structures and relatively large volumes, impurity atoms are thermodynamically more stable in SQDs than in conventional QDs. Herein, we report the facile in-situ synthesis of colloidal Ag-doped CdSe SQDs. Ag dopants were efficiently incorporated into CdSe SQDs through the three-dimensional interconnection of Ag-doped primary CdSe QDs, as confirmed by elemental analysis combined with chemical etching. Photoelectron spectroscopic studies revealed that the Ag-doped CdSe SQDs exhibit n-type doping behavior, since the valence electrons from the interstitial Ag atoms are directly donated to the lattice.
超量子点（SQD）是一种三维组装的量子点结构，由数百到数千个通过定向附着连接的量子点组成。由于其三维互连结构和相对较大的体积，杂质原子在超量子点中比在传统量子点中在热力学上更稳定。在此，我们报道了胶体银掺杂硒化镉超量子点的简便原位合成。通过元素分析结合化学蚀刻证实，银掺杂剂通过银掺杂的初级硒化镉量子点的三维互连有效地掺入到硒化镉超量子点中。光电子能谱研究表明，银掺杂的硒化镉超量子点表现出n型掺杂行为，因为间隙银原子的价电子直接贡献给晶格。
