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Title: Pressure‐Tuneable Visible‐Range Band Gap in the Ionic Spinel Tin Nitride

Journal Article · · Angewandte Chemie (International Edition)
 [1]; ORCiD logo [2]; ORCiD logo [1];  [1];  [1];  [1];  [3];  [3];  [1];  [4]; ORCiD logo [4];  [5]; ORCiD logo [2]; ORCiD logo [1]
  1. Department of Physics and Astronomy, and HiPSEC University of Nevada, Las Vegas Las Vegas NV 89154 USA
  2. Department of Physics Universität Basel 4056 Basel Switzerland
  3. High Pressure Collaborative Access Team Geophysical Laboratory, Carnegie Institute of Washington Argonne IL 60439 USA
  4. Chemistry University of Southampton Southampton SO17 1BJ UK
  5. Department of Materials Science and Metallurgy University of Cambridge Cambridge CB3 0FS UK, Advanced Institute for Materials Research Tohoku University Sendai 930-8577 Japan

Abstract The application of pressure allows systematic tuning of the charge density of a material cleanly, that is, without changes to the chemical composition via dopants, and exploratory high‐pressure experiments can inform the design of bulk syntheses of materials that benefit from their properties under compression. The electronic and structural response of semiconducting tin nitride Sn 3 N 4 under compression is now reported. A continuous opening of the optical band gap was observed from 1.3 eV to 3.0 eV over a range of 100 GPa, a 540 nm blue‐shift spanning the entire visible spectrum. The pressure‐mediated band gap opening is general to this material across numerous high‐density polymorphs, implicating the predominant ionic bonding in the material as the cause. The rate of decompression to ambient conditions permits access to recoverable metastable states with varying band gaps energies, opening the possibility of pressure‐tuneable electronic properties for future applications.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DEFG02- 99ER45775.
OSTI ID:
1476834
Alternate ID(s):
OSTI ID: 1463369
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Vol. 57 Journal Issue: 36; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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