材料科学
晶体管
数码产品
聚合物
有机电子学
电介质
柔性电子器件
光电子学
纳米技术
电气工程
复合材料
工程类
电压
作者
Mingxin Zhang,Cong Zhang,Yahan Yang,Hang Ren,Junmo Zhang,Xiaoli Zhao,Yanhong Tong,Qingxin Tang,Yichun Liu
出处
期刊:Research
[American Association for the Advancement of Science]
日期:2021-01-01
卷期号:2021
被引量:8
标识
DOI:10.34133/2021/9897353
摘要
Scarcity of the antisolvent polymer dielectrics and their poor stability have significantly prevented solution-processed ultraflexible organic transistors from low-temperature, large-scale production for applications in low-cost skin-inspired electronics. Here, we present a novel low-temperature solution-processed PEI-EP polymer dielectric with dramatically enhanced thermal stability, humidity stability, and frequency stability compared with the conventional PVA/c-PVA and c-PVP dielectrics, by incorporating polyethyleneimine PEI as crosslinking sites in nonhydroxyl epoxy EP. The PEI-EP dielectric requires a very low process temperature as low as 70°C and simultaneously possesses the high initial decomposition temperature (340°C) and glass transition temperature (230°C), humidity-resistant dielectric properties, and frequency-independent capacitance. Integrated into the solution-processed C8-BTBT thin-film transistors, the PEI-EP dielectric enables the device stable operation in air within 2 months and in high-humidity environment from 20 to 100% without significant performance degradation. The PEI-EP dielectric transistor array also presents weak hysteresis transfer characteristics, excellent electrical performance with 100% operation rate, high mobility up to 7.98 cm 2 V -1 s -1 (1 Hz) and average mobility as high as 5.3 cm 2 V -1 s -1 (1 Hz), excellent flexibility with the normal operation at the bending radius down to 0.003 mm, and foldable and crumpling-resistant capability. These results reveal the great potential of PEI-EP polymer as dielectric of low-temperature solution-processed ultraflexible organic transistors and open a new strategy for the development and applications of next-generation low-cost skin electronics.
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