Neutron transmutation doping effect on the optical property of germanium nanocrystals

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• 作者：Youwen Hu ; Tiecheng Lu ; Shaobo Dun ; Qiang Hu ; Caofeng You ; Qingyun Chen ; Ningkang Huang ; Lev Resnick ; Issai Shlimak ; Kai Sun ; Wen Xu
• 关键词：Nanocrystals ; Neutron transmutation doping ; Photoluminescence ; Neutron irradiation
• 刊名：Scripta Materialia
• 出版年：2009
• 出版时间：November 2009
• 年：2009
• 卷：61
• 期：10
• 页码：970-973
• 全文大小：294 K

文摘

Arsenic-doped isotopic ⁷⁴Ge nanocrystals (nc-⁷⁴Ge) embedded in amorphous SiO₂ films were prepared by neutron transmutation doping (NTD) and the influence of the As additive on the optical properties of the samples was investigated. The optical results showed that the original nc-⁷⁴Ge photoluminescence (PL) (620 nm) blue-shift and PL quenching could be seen by the appearance of Auger-like recombination channels, while the increase in PL was produced by neutron irradiation and a second annealing, not by the As impurities.