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Acta Phys. -Chim. Sin.  2010, Vol. 26 Issue (07): 1941-1946    DOI: 10.3866/PKU.WHXB20100718
PHOTOCHEMISTRY AND SPECTROSCOPY     
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
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
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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 wordsPhotoisomerization      Photochromic spiropyran      Thin-filmtransistor      Gate dielectric     
Received: 01 February 2010      Published: 24 May 2010
MSC2000:  O644  
Corresponding Authors: GUO Xue-Feng     E-mail: guoxf@pku.edu.cn
Cite this article:

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. Acta Phys. -Chim. Sin., 2010, 26(07): 1941-1946.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20100718     OR     http://www.whxb.pku.edu.cn/Y2010/V26/I07/1941

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