Retraction to: Journal of Materials Science: Materials in Electronics (2020) 31:8359–8369 https://doi.org/10.1007/s10854-020-03371-1

The authors have retracted this article because the majority of the data that are presented, together with the methods, discussion and conclusions, are replicated from an article in Mandarin that has been published previously [1]. Guanyu Cai, Qingyun Xiong and Bruno Viana agree with this retraction. Kaijing Wang has not responded to any correspondence about this retraction.