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High‐Performance, Ultrathin, Ultraflexible Organic Thin‐Film Transistor Array Via Solution Process
Small ( IF 13.3 ) Pub Date : 2018-07-12 , DOI: 10.1002/smll.201801020
Hang Ren 1 , Nan Cui 1 , Qingxin Tang 1 , Yanhong Tong 1 , Xiaoli Zhao 1 , Yichun Liu 1
Affiliation  

Ultrathin organic thin‐film transistors (OTFTs) have received extensive attention due to their outstanding advantages, such as extreme flexibility, good conformability, ultralight weight, and compatibility with low‐cost and large‐area solution‐processed techniques. However, compared with the rigid substrates, it still remains a challenge to fabricate high‐performance ultrathin OTFTs. In this study, a high‐performance ultrathin 2,7‐dioctyl[1]benzothieno[3,2‐b][1]benzothiophene (C8‐BTBT) OTFT array is demonstrated via a simple spin‐coating method, with mobility as high as 11 cm2 V−1 s−1 (average mobility: 7.22 cm2 V−1 s−1), on/off current ratio of over 106, switching current of >1 mA, and a good yield ratio as high as 100%. The ultrathin thickness at ≈380 nm and the ultralight weight at ≈0.89 g m−2 enable the free‐standing OTFTs to imperceptibly adhere onto human skin, and even a damselfly wing without affecting its flying. More importantly, the OTFTs show good electrical characteristics and mechanical stability when conformed onto the curved surfaces and even folded in a book after 100 folding cycles. These results illustrate the broad application potential of this simply fabricated ultrathin OTFT in next‐generation electronics such as foldable displays and wearable devices.

中文翻译:

高性能,超薄,超柔性有机薄膜晶体管阵列,通过溶液处理工艺

超薄有机薄膜晶体管(OTFT)由于其突出的优势而受到广泛关注,例如极高的灵活性,良好的一致性,超轻的重量以及与低成本和大面积溶液处理技术的兼容性。但是,与刚性基板相比,制造高性能超薄OTFT仍然是一个挑战。在这项研究中,通过简单的旋涂方法展示了一种高性能的超薄2,7-二辛基[1]苯并噻吩并[3,2-b] [1]苯并噻吩(C8-BTBT)OTFT阵列,其迁移率很高为11 cm 2 V -1 s -1(平均迁移率:7.22 cm 2 V -1 s -1),开/关电流比超过10 6,开关电流> 1 mA,良率高达100%。约380 nm的超薄厚度和约0.89 gm -2的超轻重量使独立式OTFT可以不知不觉地粘附在人的皮肤上,甚至粘在豆娘的机翼上,而不会影响其飞行。更重要的是,OTFT贴合在曲面上并在100个折叠周期后甚至折叠成书,都显示出良好的电气特性和机械稳定性。这些结果说明了这种简单制造的超薄OTFT在下一代电子产品(如可折叠显示器和可穿戴设备)中的广泛应用潜力。
更新日期:2018-07-12
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