title: Self-Healing Polymer Dielectric for a High Capacitance Gate Insulator.
abstract: 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 °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 μF/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.
authors: Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Seoul 08826, Republic of Korea.
authors: Jieun
authors: J
authors: Ko
authors: Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Seoul 08826, Republic of Korea.
authors: Young-Jae
authors: YJ
authors: Kim
authors: Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Seoul 08826, Republic of Korea.|Advanced Institutes of Convergence Technology , 145 Gwang gyo-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16229, Republic of Korea.
authors: Youn Sang
authors: YS
authors: Kim
keywords: flexible electronics; gate insulator; high capacitance; self-healing electronics; thin-film transistors