Organic semiconductors offer the opportunity to develop intrinsically stretchable skin-like electronics for future applications. However, the lack of intrinsically stretchable materials is still a fundamental challenge, originating from the brittle nature of most organic semiconductors with the fracture strain at a few percent (<10%). Here, a stretchable semiconductor composite is reported by blending the brittle poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophen-2-yl)-alt-[1,2,5]thiad-iazolo [3,4-c] pyridine] (PCDTPT) semiconductor with the crack-onset strain only at 5% and the styrene-ethylene-butylene-styrene elastomer. This blend films present the increased crack-onset strain up to 182% and superior optical transparency (>95% at 550 nm), with mobility as high as 2.31 cm² V⁻¹ s⁻¹. The depth-dependence light absorption spectra and the conductive atomic force microscopy images in horizontal and vertical directions of the blend film confirm the nonuniform distribution of PCDTPT fibers with sandwiched structure, which weakens the effect of device configuration on mobility. Compared with the conventional uniform film, the sandwiched film weakens the effect of device configuration on mobility. The fully transparent stretchable transistors with the blend films show the outstanding ductility and high optical transparency. This work opens up a feasible path for brittle organic semiconductors used in the transparent stretchable transistor, presenting their promising potential in future see-through skin-like electronics.

中文翻译：

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用于透明可拉伸类皮肤电子的基于脆性 PCDTPT 的弹性混合网络

有机半导体为未来应用开发本质上可拉伸的类皮肤电子产品提供了机会。然而，缺乏本质上可拉伸的材料仍然是一个根本性的挑战，这源于大多数有机半导体的脆性，其断裂应变只有百分之几（<10%）。在这里，通过混合脆性聚 [4-(4,4-dihexadecyl-4H-cyclopenta[1,2- b :5,4- b ']dithiophen-2-yl)-alt-[报道了一种可拉伸的半导体复合材料。1,2,5]thiad-iazolo [3,4-c] pyridine] (PCDTPT)半导体和苯乙烯-乙烯-丁烯-苯乙烯弹性体的裂纹起始应变仅为5%。这种共混薄膜呈现出高达 182% 的裂纹起始应力和出色的光学透明度（在 550 nm 时 >95%），迁移率高达 2.31 cm² 伏^-1 秒^-1。共混膜水平和垂直方向的深度依赖性光吸收光谱和导电原子力显微镜图像证实了具有夹层结构的PCDTPT纤维的不均匀分布，这削弱了器件配置对迁移率的影响。与传统的均匀薄膜相比，夹层薄膜削弱了器件配置对迁移率的影响。具有混合薄膜的全透明可拉伸晶体管显示出出色的延展性和高光学透明度。这项工作为透明可拉伸晶体管中使用的脆性有机半导体开辟了一条可行的途径，展示了它们在未来透明类皮肤电子产品中的巨大潜力。