Optically switchable transistor via energy-level phototuning in a bicomponent organic semiconductor
Optically switchable transistor via energy-level phototuning in a bicomponent organic semiconductor
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DOI：
10.1038/nchem.1384
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发表时间：
2012-08-01
期刊：
影响因子：
21.8
通讯作者：
Samori, Paolo
中科院分区：
文献类型：
--
作者：
Orgiu, Emanuele;Crivillers, Nuria;Samori, Paolo
有机半导体是可印刷、柔性和大面积电子产品的合适候选者。除了获得改进的器件性能外，赋予所用材料多功能性是基于有机物的逻辑应用的关键。在这里，我们报告的工程中的半导体薄膜的电子结构，通过共混两个分子组分，光致变色二芳基乙烯衍生物和聚（3-己基噻吩）（P3 HT）矩阵，以达到光可调和可调能级的P3 HT的空穴传输。作为概念验证，我们将这种混合物用作有机薄膜晶体管中的半导体材料。在限定波长下的装置照明使得能够可逆地调谐共混物中的二芳基乙烯的电子状态，这导致输出电流的调制。发现装置光响应在微秒范围内，因此在技术相关的时间尺度上。这种模块化混合方法允许方便地结合各种分子组件，这开辟了多功能器件和逻辑电路的前景。
Organic semiconductors are suitable candidates for printable, flexible and large-area electronics. Alongside attaining an improved device performance, to confer a multifunctional nature to the employed materials is key for organic-based logic applications. Here we report on the engineering of an electronic structure in a semiconducting film by blending two molecular components, a photochromic diarylethene derivative and a poly(3-hexylthiophene) (P3HT) matrix, to attain phototunable and bistable energy levels for the P3HT's hole transport. As a proof-of-concept we exploited this blend as a semiconducting material in organic thin-film transistors. The device illumination at defined wavelengths enabled reversible tuning of the diarylethene's electronic states in the blend, which resulted in modulation of the output current. The device photoresponse was found to be in the microsecond range, and thus on a technologically relevant timescale. This modular blending approach allows for the convenient incorporation of various molecular components, which opens up perspectives on multifunctional devices and logic circuits.