[Peng, Qiong] Hengyang Normal Univ, Inst Condensed Phys, Key Lab Micronano Energy Mat & Applicat Technol, Hengyang 421002, Peoples R China.
[Peng, Qiong] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Peoples R China.
[Rehman, Javed] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China.
[Rehman, Javed] Yanshan Univ, Sch Mat Sci & Engn, Qinhuangdao 066004, Peoples R China.
[Li, Zhipeng; Li, ZP; Butt, Mehwish Khalid] Northwestern Polytech Univ, Xian Inst Flexible Elect, Frontiers Sci Ctr Flexible Elect, 127 West Youyi Rd, Xian 710072, Peoples R China.