Blue-green emission from epitaxial yet cation-disordered ZnGeN2−xOx

  title={Blue-green emission from epitaxial yet cation-disordered 
  author={Celeste L. Melamed and M. Brooks Tellekamp and John S. Mangum and John D. Perkins and Patricia C. Dippo and Eric S. Toberer and Adele C. Tamboli},
  journal={Physical Review Materials},
ZnGeN$_2$ offers a low-cost alternative to InGaN with the potential for bandgap tuning to span the green gap using cation site ordering. The addition of oxygen on the anion site creates an additional degree of electronic tunability. Here, we investigate the structure and optoelectronic properties of an epitaxial ZnGeN$_{2-x}$O$_{x}$ thin film library grown by combinatorial co-sputtering on c-Al$_2$O$_3$. Samples exhibit X-ray diffraction patterns and X-ray pole figures characteristic of a… 

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