Accurate analysis of the size distribution and crystallinity of boron doped Si nanocrystals via Raman and PL spectra

X. Jia*, Z. Lin, T. Zhang, B. Puthen-Veettil, T. Yang, K. Nomoto, J. Ding, G. Conibeer, I. Perez-Wurfl

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)
5 Downloads (Pure)

Abstract

A narrow size distribution of quantum dots (QDs) is needed for their application in photovoltaics but collection of such information is difficult. This paper demonstrates the application of Raman spectroscopy as a characterisation tool to extract the size distribution and crystalline fraction of Si QD samples fabricated through the sputter-anneal method. Measured Raman spectra of Si QD materials are de-convoluted into four components according to their origins and Raman scattering by Si QD cores is described by a modified one phonon confinement model, while other components are reproduced with Gaussian functions. Through fitting of Raman spectra, Si QD size distributions and Si crystalline fractions are obtained. The results are compared with the values extracted from PL modelling on a series of B doped Si QD samples. The good consistency between the values extracted by these two methods confirms the validity of the Raman model. The result confirms that Si crystallization has been suppressed by B doping as the average Si QD size and Si crystalline fraction are reduced with increased B doping level.

Original languageEnglish
Pages (from-to)34244-34250
Number of pages7
JournalRSC Advances
Volume7
Issue number54
DOIs
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Copyright the Publisher 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Fingerprint Dive into the research topics of 'Accurate analysis of the size distribution and crystallinity of boron doped Si nanocrystals via Raman and PL spectra'. Together they form a unique fingerprint.

  • Cite this