Atomistic tight-binding theory of excitonic splitting energies in CdX(X = Se, S and Te)/ZnS core/shell nanocrystals

详细信息    查看全文

• 作者：Worasak Sukkabot^a ; ^{w.sukkabot@gmail.com} ; Udomsilp Pinsook^b
• 关键词：Tight-binding theory ; Excitonic splitting ; Electron-hole exchange interaction ; Core/shell nanocrystals
• 刊名：Superlattices and Microstructures
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：101
• 期：Complete
• 页码：15-22
• 全文大小：1359 K
• 卷排序：101

文摘

Excitonic splitting of CdX(X = Se, S and Te)/ZnS core/shell nanocrystals is analysed by a tight-binding theory and a configuration interaction method. Excitonic splitting energies are decreased with the increasing ZnS shell thickness. The strongest electron-hole interactions are detected in CdSe/ZnS core/shell nanocrystals. CdS/ZnS core/shell nanocrystals are the best candidates to be the source of entangled photons.