Affordable Access

deepdyve-link
Publisher Website

Chemically Tunable Full Spectrum Optical Properties of 2D Silicon Telluride Nanoplates.

Authors
  • Wang, Mengjing1, 2
  • Lahti, Gabriella1
  • Williams, David1
  • Koski, Kristie J1
  • 1 Department of Chemistry , University of California Davis , Davis , California 95616 , United States. , (United States)
  • 2 Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States. , (United States)
Type
Published Article
Journal
ACS Nano
Publisher
American Chemical Society
Publication Date
Jun 12, 2018
Identifiers
DOI: 10.1021/acsnano.8b02789
PMID: 29878756
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Silicon telluride (Si2Te3) is a two-dimensional, layered, p-type semiconductor that shows broad near-infrared photoluminescence. We show how, through various means of chemical modification, Si2Te3 can have its optoelectronic properties modified in several independent ways without fundamentally altering the host crystalline lattice. Substitutional doping with Ge strongly red-shifts the photoluminescence while substantially lowering the direct and indirect band gaps and altering the optical phonon modes. Intercalation with Ge introduces a sharp 4.3 eV ultraviolet resonance and shifts the bulk plasmon even while leaving the infrared response and band gaps virtually unchanged. Intercalation with copper strengthens the photoluminescence without altering its spectral shape. Thus, silicon telluride is shown to be a chemically tunable platform of full spectrum optical properties promising for optoelectronic applications.

Report this publication

Statistics

Seen <100 times