Si2O3

Si2O3 is a semiconducting, metastable silicon oxide that exists in various structural forms.

OSi
Crystal structure of Si2O3
Ground-state structure · Materials Project
Overview

About Si2O3

Si2O3 is a semiconducting oxide composed of silicon and oxygen. As a material that sits above the thermodynamic hull, it represents a metastable phase within the broader landscape of silicon-oxygen compounds. Its existence is characterized by a high degree of structural diversity, with numerous reported configurations observed in computational databases. The study of this compound is significant for understanding the complex phase space of silicon oxides beyond the common dioxide forms. Its semiconducting nature makes it a subject of interest for researchers investigating non-stoichiometric materials and their potential for specialized electronic applications.

At a glance

Key Properties

Cross-validated computational properties for Si2O3, aggregated across 3 databases.

Band Gap

0.99 eV
Range across DFT structures

Energy Above Hull

0.780 eV/atom
Best (lowest) across sources

Stability

Above hull
1 DFT source

Structures

37
3 databases, 10 space groups
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting Si2O3.

Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where Si2O3 is used.

Fundamental materials researchSemiconductor device modelingNon-stoichiometric oxide studies
Reference

Frequently Asked Questions

Common questions about Si2O3, answered from cross-validated data.

What is Si2O3?

Si2O3 is a semiconducting, metastable silicon oxide that exists in various structural forms.

More questions
What is Si2O3 used for?
Si2O3 is used in fundamental materials research, semiconductor device modeling, and non-stoichiometric oxide studies.
What is the band gap of Si2O3?
Si2O3 has a DFT-computed band gap of 0.99 eV across 37 reported structures.
Is Si2O3 a metal, semiconductor, or insulator?
With a band gap up to 0.99 eV it is a semiconductor.
Is Si2O3 thermodynamically stable?
Si2O3 has a lowest energy above hull of 0.780 eV/atom (above hull).
How many polymorphs of Si2O3 are known?
37 structures of Si2O3 are reported across 3 databases, spanning 10 distinct space groups.
How is Si2O3 synthesized?
Literature-reported routes for Si2O3 include solid state (2 procedures documented).
What elements does Si2O3 contain?
Si2O3 contains O and Si (2 elements).
Where does the data for Si2O3 come from?
Si2O3 data is cross-referenced from latticegraph.
Comparison

How It Compares

As a unique silicon-oxygen phase, Si2O3 occupies a distinct position in materials science where it serves as a representative of the complex, metastable stoichiometry that can emerge in silicon-based systems. Unlike the highly stable and ubiquitous silicon dioxide, this compound exists in a more precarious energetic state, highlighting the variety of bonding environments possible between these two elements.

Data sources & attribution
  • latticegraph — Lattice Graph Materials Intelligence Platform

Analyze Si2O3 in the Lattice Graph platform

Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.

Explore the Platform →