Ternary nitrides - a disorder tunable material
1Helmholtz-Zentrum Berlin für Materialien und Energie, Abteilung Struktur und Dynamik von Energiematerialien
2Freie Universität Berlin, Institut für geologische Wissenschaften
Ternary nitrides ZnMIVN2 (MIV= Ge,Sn) are being considered as promising candidates for photovoltaic absorber materials, containing uniquely elements of low toxicity and low resource criticality . It has been postulated based on DFT calculations that these compounds possess a mechanism for bandgap tuning through cation disorder .
We are using diffraction techniques to investigate the crystal structure and structural disorder of Zn1+xGe1-x(N1-xOx)2 (x<0.35) which allows us to distinguish between intrinsic and compositional cation disorder. Finally the relationship between cation disorder and the bandgap energy is discussed.
 Narang, et al., Adv. Mater. 26 (2014) 1235–1241.
 Skachkov, et al., Phys. Rev. B. 94 (2016) 205201.
Susan Schorr has a diploma in crystallography and a PhD in physics. She is the head of the Department Structure and Dynamics of Energy Materials at the Helmholtz-Zentrum Berlin and teaches at the Freie Universität Berlin.