Multi-chromatic silicon nanocrystals

Benjamin Bruhn; Benjamin JM Brenny; Sidoeri Dekker; Ilker Doğan; Peter Schall; Katerina Dohnalová

doi:10.1038/lsa.2017.7

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Multi-chromatic silicon nanocrystals

Original Articles

- Multi-chromatic silicon nanocrystals
- Light: Science & Applications Vol. 6, Issue 3, (2017)
- Affiliations：
  
  1.Van der Waals-Zeeman Institute, University of Amsterdam, Science Park 904, Amsterdam 1098 XH, The Netherlands
  2.Center for Nanophotonics, AMOLF, Science Park 104, Amsterdam 1098 XG, The Netherlands
  3.Department of Applied Physics, Eindhoven University of Technology, P.O. Box 512, Eindhoven 5600 MB, The Netherlands
  4.Dutch Institute for Fundamental Energy Research (DIFFER), P.O. Box 6336, Eindhoven 5600 HH, The Netherlands
- Author bio：
  
  K Dohnalová, Email: k.dohnalova@uva.nl
- Funds：
- DOI：10.1038/lsa.2017.7
  CLC：
- Published：2017-09，
  
  Published Online：10 February 2017，
  
  Received：01 August 2016，
  
  Revised：01 February 2017，
  
  Accepted：08 February 2017
- Accepted：
Scan QR Code
Bruhn, B. et al. Multi-chromatic silicon nanocrystals. Light: Science & Applications, 6, e17007 (2017).
DOI：

Bruhn, B. et al. Multi-chromatic silicon nanocrystals. Light: Science & Applications, 6, e17007 (2017). DOI： 10.1038/lsa.2017.7.

摘要

Abstract

Silicon nanocrystals (SiNCs) have great potential to become environmental friendly alternatives to heavy-metal containing nanocrystals for applications including medical imaging

lighting and displays. SiNCs exhibit excellent photostability

non-toxicity and abundant resources

but their often reported inefficient and spectrally limited light emission seriously impair their applications. Here we demonstrate a new method that converts SiNCs into an efficient and robust multi-chromatic phosphor. Using ~15 keV electron-beam irradiation of oxide-capped SiNCs

we introduce several types of color centers into the nanocrystal's oxide shell with efficient blue

green and red emission bands

together yielding warm-white photoluminescence

even for a single SiNC. Introduced centers are not native to the original system and we relate them to known defects in silica. Unlike in the silica host

however

here the centers are efficiently optically excitable. Provided further optimization and up-scaling of this method

e-beam irradiated SiNCs can be of great interest as white phosphors for applications such as LEDs.

关键词

Keywords

cathodoluminscencecolor centerelectron beammulti-chromaticitysilicon nanocrystals

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