物理化学学报 >> 2010, Vol. 26 >> Issue (07): 1941-1946.doi: 10.3866/PKU.WHXB20100718

光化学与光谱 上一篇    下一篇

通过构象诱导电感耦合机制光可逆调控有机场效应晶体管的性能

申茜, 甘霖, 刘松, 曹阳, 王振兴, 惠静姝, 郭雪峰   

  1. 北京大学化学与分子工程学院, 分子动态与稳态结构国家重点实验室, 北京分子科学国家实验室, 北京 100871
  • 收稿日期:2010-02-01 修回日期:2010-04-14 发布日期:2010-07-02
  • 通讯作者: 郭雪峰 E-mail:guoxf@pku.edu.cn

Reversible Photomodulation of Organic Transistor Performance by Conformation-Induced Capacitive Coupling

SHEN Qian, GAN Lin, LIU Song, CAO Yang, WANG Zhen-Xing, HUI Jing-Shu, GUO Xue-Feng   

  1. Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2010-02-01 Revised:2010-04-14 Published:2010-07-02
  • Contact: GUO Xue-Feng E-mail:guoxf@pku.edu.cn

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摘要：

将有机场效应晶体管用于传感和开关实际应用的主要阻碍之一是其破坏性传感机制产生的一系列问题. 这里我们报道了一种智能的系统, 用光致变色分子螺吡喃(SP)和聚甲基丙烯酸甲酯(PMMA)结合作为栅介电材料, 得到的器件能以一种无损的方式, 通过光可逆调控器件的导电性能. 当螺吡喃分子发生可逆的光学异构时, 器件的电容和导电性随之发生显著而可逆的变化. 这种构象诱导电感耦合的作用机理提供了一种制备功能器件的新方法, 可以推广为利用其它刺激响应型分子来制备特定功能器件的普适性方法.

关键词: 光异构化, 光致变色分子螺吡喃, 薄膜晶体管, 栅介电质

Abstract:

Problems associated with intrinsically destructive sensing mechanisms of organic field-effect transistors constitute one of the main obstacles to using them for the practical applications in sensing and switching. Here we report a smart system, in which a photochromic spiropyran (SP) combined with polymethyl methacrylate (PMMA) is used as a gate dielectric, to develop functional molecular devices capable of photoswitching their electrical conductivity in a noninvasive manner. Significant and reversible capacitance and current transitions in devices are generally demonstrated experimentally when the SP molecules undergo their documented reversible photoisomerization. This concept of conformation-induced capacitive coupling offers attractive new prospects for the development of functional devices by utilizing other stimuli-responsive molecular materials.

Key words: Photoisomerization, Photochromic spiropyran, Thin-filmtransistor, Gate dielectric