材料科学
去湿
响应度
纳米技术
光电子学
平版印刷术
模板
有机半导体
纳米结构
光电探测器
薄膜
作者
Yu Zhang,Yang Qiu,Xinyi Li,Yangwu Guo,Shougen Cao,Hanfei Gao,Yuchen Wu,Lei Jiang
出处
期刊:Small
[Wiley]
日期:2022-09-09
卷期号:18 (41)
被引量:7
标识
DOI:10.1002/smll.202203429
摘要
Abstract Flexible organic near‐infrared (NIR) phototransistors hold promising prospects for potential applications such as noninvasive bioimaging, health monitoring, and biometric authentication. For integrated circuits of high‐performance devices, organic single‐crystalline micro‐/nanostructures with precise positioning are prominently anticipated. However, the manufacturing of organic single‐crystalline arrays remains a conundrum due to difficulties encountered in patterning arrays of dewetting processes at micron‐scale confined space and modulating the dewetting dynamics. Herein, we utilize a capillary‐bridge lithography strategy to fabricate organic 1D arrays with high quality, homogeneous size, and deterministic location toward high‐performance flexible organic NIR phototransistors. Regular micro‐liquid stripes and unidirectional dewetting are synchronously achieved by adapting micropillar templates with asymmetric wettability. As a result, high‐throughput 1D arrays based organic field‐effect transistors exhibit high electron mobility up to 9.82 cm 2 V –1 s –1 . Impressively, flexible NIR phototransistors also show outstanding photoelectronic performances with a photosensitivity of 9.87 × 10 5 , a responsivity of 1.79 × 10 4 A W −1 , and a specific detectivity of 3.92 × 10 14 Jones. This work paves a novel way to pattern high‐throughput organic single‐crystalline microarrays toward flexible NIR organic optoelectronics.
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