Optical modulation of the charge injection in an organic field-effect transistor based on photochromic self-assembled-monolayer-functionalized electrodes.

Abstract

In the last decades a great amount of effort has been devoted to the fabrication of organic fi eld-effect transistors (OFET) featuring high performance as key elements for new organicbased logic applications. The endeavor has been focused on the improvement of each of the main contributing components of the devices. This includes design and synthesis of new semiconductors (pand n-type), which show improved air stability, self-assembly behavior, and electrical characteristics, and, more recently, the development of novel high-performance gate dielectrics and novel processing techniques. [ 1 ] In addition to the optimization of the device architecture, the engineering of the interface semiconductor–dielectric [ 2 ] and semiconductor– metallic contacts have attracted much interest due to the importance of the interfacial morphology and the hole–electron injection barrier on the device performance. In particular, selfassembled monolayers (SAMs) are widely used to tune the wettability and work function of the metal–organic junctions. [ 3 ] In contrast to the extensively employed chemisorbed alkaneand arene-thiol SAMs, the use of SAMs based on molecules that respond to external stimuli has still not been explored. Among responsive systems, azobenzenes are known to undergo reversible photoinduced isomerization between trans and cis forms, which can exhibit different optical and electrical properties. [ 4 ]

DOI: 10.1002/adma.201003736

4 Figures and Tables

Cite this paper

@article{Crivillers2011OpticalMO, title={Optical modulation of the charge injection in an organic field-effect transistor based on photochromic self-assembled-monolayer-functionalized electrodes.}, author={N{\'u}ria Crivillers and Emanuele Orgiu and Federica Reinders and Marcel Mayor and Paolo Samor{\`i}}, journal={Advanced materials}, year={2011}, volume={23 12}, pages={1447-52} }