Investigation of band gaps and bowing parameters for zincblende III-nitride ternary alloys

Bo-Ting Liou; Sheng-Horng Yen; Yen-Kuang Kuo

doi:10.1117/12.644464

3 March 2006 Investigation of band gaps and bowing parameters for zincblende III-nitride ternary alloys

Bo-Ting Liou, Sheng-Horng Yen, Yen-Kuang Kuo

Proceedings Volume 6121, Gallium Nitride Materials and Devices; 61210M (2006) https://doi.org/10.1117/12.644464
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

The zincblende In_xGa_1-xN, Al_xGa_1-xN, and Al_xIn_1-xN alloys are studied by numerical analysis based on first-principles calculations. The results show that the lattice constant of the three alloys obeys the Vegard's law. For In_xGa_1-xN the direct band gap bowing parameter obtained with the equilibrium lattice constant is 1.890 ± 0.097 eV. For Al_xGa_1-xN the direct and indirect bowing parameters of 0.574 ± 0.034 eV and 0.055 ± 0.038 eV are obtained, and there is a direct-indirect crossover near x = 0.56. For Al_xIn_1-xN the direct and indirect bowing parameters of 3.5694 ± 0.028 eV and 0.1953 ± 0.054 eV are obtained, and there is a direct-indirect crossover near x = 0.807

Citation Download Citation

Bo-Ting Liou, Sheng-Horng Yen, and Yen-Kuang Kuo "Investigation of band gaps and bowing parameters for zincblende III-nitride ternary alloys", Proc. SPIE 6121, Gallium Nitride Materials and Devices, 61210M (3 March 2006); https://doi.org/10.1117/12.644464

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