Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session P21: Semiconductors and Quantum Dots for Energy Applications
2:30 PM–5:30 PM,
Wednesday, March 4, 2020
Room: 302
Sponsoring
Unit:
GERA
Chair: Robert Kaplar, Sandia National Laboratories
Abstract: P21.00002 : Towards efficient green emitters: Heteroepitaxial ZnGeN2 on GaN by molecular beam epitaxy
Presenter:
Marshall Tellekamp
(National Renewable Energy Laboratory)
Authors:
Marshall Tellekamp
(National Renewable Energy Laboratory)
Celeste Melamed
(National Renewable Energy Laboratory)
Andrew Norman
(National Renewable Energy Laboratory)
Adele Tamboli
(National Renewable Energy Laboratory)
II-IV-N2 materials are an optically relevant class of materials with direct gaps across the visible spectrum. ZnGeN2 is nearly lattice matched to GaN, providing a direct route to device integration within a mature system, and can potentially enable green and amber emission at much lower lattice mismatch than InGaN.
The heteroepitaxial growth of ZnGeN2 on GaN by molecular beam epitaxy will be discussed, highlighting the impact of Zn desorption and interfacial surface energy on nucleation rate. Insights into growth regimes and limitations will be given, highlighting practical considerations for the characterization of potentially cation-disordered materials. Heterostructure growth represents a major step toward enabling hybrid III-N/II-IV-N2 optical devices.
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