1. Institut National de la Recherche Scientifique (INRS)‐Énergie Matériaux et Télécommunications Varennes Quebec J3X 1S2 Canada
2. Engineering Research Center of Thin Film Optoelectronics Technology Ministry of Education and College of Electronic Information and Optical Engineering Nankai University Tianjin 300350 China
3. Department of Inorganic Materials School of Minerals Processing and Bioengineering Central South University Changsha 410083 China