同轴静电纺丝制备可拉伸透明芯-壳聚合物纳米纤维及其在光电晶体管中的应用,Advanced Electronic Materials

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同轴静电纺丝制备可拉伸透明芯-壳聚合物纳米纤维及其在光电晶体管中的应用
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-01-25 , DOI: 10.1002/aelm.202001000
Moo Yeol Lee _{1,

2} , Youngseok Oh ₃ , Jayeon Hong ₄ , Sang Jin Lee ₄ , Dong Gi Seong ₅ , Moon‐Kwang Um ₃ , Joon Hak Oh ₁

Affiliation

一维半导体纳米材料是可穿戴电子设备的有希望的候选者，其中形式的可变性（即柔韧性和可拉伸性）是在用户的身体活动中实现稳定操作的关键因素。尽管已经提出了许多可拉伸的一维电子材料，但是它们主要依赖于结构工程，而不是材料的固有可拉伸性，因此在机械变形下会遭受电不稳定的困扰。在这项工作中，使用同轴电纺丝制造了可拉伸的核-壳型聚合物纳米纤维（NFs）。可伸展的核-壳NF由可伸展的核和半导体壳组成，在外部应变下提供了机械强度和优越的电性能。可拉伸的核壳NF基晶体管在高达30％的机械应变下显示出很高的工作稳定性。此外，使用核-壳NF和可拉伸导体制成的可完全拉伸的有机场效应晶体管表现出稳定的操作和高的光学透明性（在550 nm波长下具有71％的透射率）。核壳型NF还具有出色的光电性能，包括最大的光响应性（在585 nm波长的照明下，R）为84.2 AW ^-1，外部量子效率（EQE）为178.6％。结果表明，采用可伸展的核壳聚合物NFs制造可穿戴电子设备的可行方法。

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Fabrication of Stretchable and Transparent Core–Shell Polymeric Nanofibers Using Coaxial Electrospinning and Their Application to Phototransistors

1D semiconducting nanomaterials are promising candidates for wearable electronic devices, in which variability of form (i.e., flexibility and stretchability) is a crucial factor for achieving stable operation during a user's physical activity. Although many stretchable 1D electronic materials have been suggested, they mainly rely on structural engineering, rather than the intrinsic stretchability of the materials, and hence suffer from electrical instability under mechanical deformation. In this work, stretchable core–shell polymeric nanofibers (NFs) are fabricated using coaxial electrospinning. The stretchable core–shell NFs, which consist of a stretchable core and a semiconducting shell, provide both mechanical robustness and superior electrical properties under external strain. The stretchable core–shell NF‐based transistors show high operational stability at up to 30% mechanical strain. Furthermore, fully stretchable organic field‐effect transistors fabricated using core–shell NFs and stretchable conductors exhibit stable operation and high optical transparency (71% of transmittance at a wavelength of 550 nm). The core–shell NFs also exhibit excellent optoelectronic properties, including a maximum light responsivity (R) of 84.2 A W⁻¹ and an external quantum efficiency (EQE) of 178.6%, under illumination at a wavelength of 585 nm. The results demonstrate a viable approach to fabricating wearable electronic devices using stretchable core–shell polymeric NFs.

更新日期：2021-01-25

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