期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 36, 页码 23854-23861出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b08220
关键词
self-healing electronics; gate insulator; high capacitance; flexible electronics; thin-film transistors
资金
- Center for Advanced Soft Electronics of the Global Frontier Research Program of the Ministry of Science, ICT, and Future Planning of Korea [2013M3A6A5073177]
Self-healing materials are required for development of various flexible electronic devices to repair cracks and ruptures caused by repetitive bending or folding. Specifically, a self-healing dielectric layer has huge potential to achieve healing electronics without mechanical breakdown in flexible Operations. Here, we developed a high performance self healing dielectric layer with an ionic liquid and catechol-functionalized polymer which exhibited a self-healing ability for both bulk and film states under mild self-healing conditions at 55 degrees C for 30 min. Due to the sufficient ion mobility of the ionic liquid in the polymer matrix, it had a high capacitance value above 1 mu F/cm(2) at 20 Hz. Moreover, zinc oxide (ZnO) thin-film transistors (TFTs) with a self-healing dielectric layer exhibited a high field-effect mobility of 16.1 +/- 3.07 cm(2) V-1 s(-1) at a gate bias of 3 V. Even after repetitive self-healing of the dielectric layer from mechanical breaking, the electrical performance of the TFTs was well-maintained.
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