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Luminescence of silicon nanoparticles from oxygen implanted silicon
Uppsala Univ, Dept Phys & Astron, POB 516, SE-75120 Uppsala, Sweden..
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0003-2562-0540
Uppsala Univ, Dept Chem, Angstrom Lab, Inorgan Chem, POB 538, SE-75121 Uppsala, Sweden..
Uppsala Univ, Dept Phys & Astron, POB 516, SE-75120 Uppsala, Sweden..
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2018 (English)In: Materials Science in Semiconductor Processing, ISSN 1369-8001, E-ISSN 1873-4081, Vol. 86, p. 18-22Article in journal (Refereed) Published
Abstract [en]

Oxygen with a kinetic energy of 20 keV is implanted in a silicon wafer (100) at different fluences, followed by post-implantation thermal annealing (PIA) performed at temperatures ranging from 1000 to 1200 degrees C, in order to form luminescent silicon nanoparticles (SiNPs) and also to reduce the damage induced by the implantation. As a result of this procedure, a surface SiOx layer (with 0 < x < 2) with embedded crystalline Si nanoparticles has been created. The samples yield similar luminescence in terms of peak wavelength, lifetime, and absorption as recorded from SiNPs obtained by the more conventional method of implanting silicon into silicon dioxide. The oxygen implantation profile is characterized by elastic recoil detection (ERD) technique to obtain the excess concentration of Si in a presumed SiO2 environment. The physical structure of the implanted Si wafer is examined by grazing incidence X-ray diffraction (GIXRD). Photoluminescence (PL) techniques, including PL spectroscopy, time-resolved PL (TRPL), and photoluminescence excitation (PLE) spectroscopy are carried out in order to identify the PL origin. The results show that luminescent SiNPs are formed in a Si sample implanted by oxygen with a fluence of 2 x 10(17) atoms cm(-2) and PIA at 1000 degrees C. These SiNPs have a broad size range of 6-24 nm, as evaluated from the GIXRD result. Samples implanted at a lower fluence and/or annealed at higher temperature show only weak defect-related PL. With further optimization of the SiNP luminescence, the method may offer a simple route for integration of luminescent Si in mainstream semiconductor fabrication.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 86, p. 18-22
Keywords [en]
Oxygen implantation, Silicon nanoparticles, Photoluminescence
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-232741DOI: 10.1016/j.mssp.2018.06.004ISI: 000439119400003Scopus ID: 2-s2.0-85048803830OAI: oai:DiVA.org:kth-232741DiVA, id: diva2:1236624
Funder
Swedish Foundation for Strategic Research , RIF14-0053Swedish Research Council, 821-2012-5144 2017-00646_9 821-2012-5144 2017-00646_9
Note

QC 20180803

Available from: 2018-08-03 Created: 2018-08-03 Last updated: 2018-08-06Bibliographically approved

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Sychugov, IlyaLinnros, JanHallén, Anders

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