Neutron transmutation doping effect on the optical property of germanium nanocrystals

Youwen Hu, Tiecheng Lu, Shaobo Dun, Qiang Hu, Caofeng You, Qingyun Chen, Ningkang Huang, Lev Resnick, Issai Shlimak, Kai Sun, Wen Xu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)970-973
Number of pages4
JournalScripta Materialia
Volume61
Issue number10
DOIs
StatePublished - Nov 2009
Externally publishedYes

Bibliographical note

Funding Information:
This research was supported by Grant 3-405 from the Ministry of Science and Technology, Israel , within the cooperation program with the State Science Technology Commission, China, NASF of NSFC-CAEP of P.R. China under Grant No. 10376020 , as well as the Program for New Century Excellent Talents in University (No. NCET-04-0874 ), China. We thank A.N. Ionov and I. Lazebnik for their help in irradiating the samples with a neutron flux in a research nuclear reactor, and also thank Kai Sun and Lumin Wang for the TEM and XPS measurements and discussions of results. L.R. and I.S. are thankful to the Erick and Sheila Samson Chair of Semiconductor Technology for financial support.

Keywords

  • Nanocrystals
  • Neutron irradiation
  • Neutron transmutation doping
  • Photoluminescence

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