Ambient-stable blue luminescent silicon nanocrystals prepared by nanosecond-pulsed laser ablation in water

V Svrcek, D Mariotti, M Kondo

    Research output: Contribution to journalArticle

    61 Citations (Scopus)

    Abstract

    Even with intensive research, air-stable blue light emission from silicon nanocrystals (Si-ncs) at room temperature still remains a challenge. We show that stable and blue-luminescent Si-ncs can be produced by laser-generated plasma (nanosecond-pulsed excimer laser) confined in water. These Si-ncs exhibit quantum confinement effect dueto their size and are produced with an environmentally compatible process. The effect of aging for several weeks in water and air on blue Si-ncs emission properties is compared. The oxide shell around the nanocrystalline core formed during laser processing in water offers the required conditions for the confinement of excitons that allow for stable (in either air or water) blue photoluminescence at room temperature. (C) 2008 Optical Society of America
    Original languageEnglish
    Pages (from-to)520-527
    JournalOptics Express
    Volume17
    Issue number2
    Early online date7 Jan 2009
    Publication statusPublished - 19 Jan 2009

    Fingerprint Dive into the research topics of 'Ambient-stable blue luminescent silicon nanocrystals prepared by nanosecond-pulsed laser ablation in water'. Together they form a unique fingerprint.

  • Cite this