Epitaxial Lift‐Off of Centimeter‐Scaled Spinel Ferrite Oxide Thin Films for Flexible Electronics. Issue 33 (22nd June 2017)

• Record Type: Journal Article
• Authors: Shen, Lvkang; Wu, Liang; Sheng, Quan; Ma, Chunrui; Zhang, Yong; Lu, Lu; Ma, Ji; Ma, Jing; Bian, Jihong; Yang, Yaodong; Chen, Aiping; Lu, Xiaoli; Liu, Ming; Wang, Hong; Jia, Chun‐Lin
• Is Part Of: Advanced materials. Volume 29:Issue 33(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-06-22
• Subjects: flexible devices -- free‐standing -- functional oxide thin film -- magnetism -- spinel; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201702411
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Mechanical flexibility of electronic devices has attracted much attention from research due to the great demand in practical applications and rich commercial value. Integration of functional oxide materials in flexible polymer materials has proven an effective way to achieve flexibility of functional electronic devices. However, the chemical and mechanical incompatibilities at the interfaces of dissimilar materials make it still a big challenge to synthesize high‐quality single‐crystalline oxide thin film directly on flexible polymer substrates. This study reports an improved method that is employed to successfully transfer a centimeter‐scaled single‐crystalline LiFe5 O8 thin film on polyimide substrate. Structural characterizations show that the transferred films have essentially no difference in comparison with the as‐grown films with respect to the microstructure. In particular, the transferred LiFe5 O8 films exhibit excellent magnetic properties under various mechanical bending statuses and show excellent fatigue properties during the bending cycle tests. These results demonstrate that the improved transfer method provides an effective way to compose single‐crystalline functional oxide thin films onto flexible substrates for applications in flexible and wearable electronics. Abstract : Flexible centimeter‐scaled single‐crystalline spinel ferrite oxide thin films are transferred onto plastic substrates using a simple method. The transferred thin films exhibit not only excellent fatigue property but also stable magnetic properties even under various bending statuses. The results provide evidence for a practical way to transfer target single‐crystalline functional oxide thin films onto flexible substrates for applications in flexible and wearable electronics.