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Citation: SHEN Qian, GAN Lin, LIU Song, CAO Yang, WANG Zhen-Xing, HUI Jing-Shu, GUO Xue-Feng. Reversible Photomodulation of Organic Transistor Performance by Conformation-Induced Capacitive Coupling[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 1941-1946. doi: 10.3866/PKU.WHXB20100718 shu

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

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 Date: 1 February 2010
Available Online: 24 May 2010

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 under 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.
- Photoisomerization,
- Photochromic spiropyran,
- Thin-filmtransistor,
- Gate dielectric
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