ü. Ozgür, Y. I. Alivov, C. Liu, A. Teke, M. A. Reshchikov, S. Doan, V. Avrutin, S.-J. Cho and H. Morkoc, “A Comprehensive Review of ZnO Materials and Devices,” Journal of Applied Physics, Vol. 98, No. 4, 2005, pp. 041301-103 - References - Scientific Research Publishing