Abstract
Asymmetric current–voltage (I/V) behaviors with respect to the polarity of the voltage bias were observed in the nematic liquid crystal (NLC) cells constructed with the gold film on the silicon wafer as one substrate and an indium-tin-oxide (ITO)-coated glass slide as the other substrate. A little smaller current resulted at the positive bias corresponding to the positive voltage bias being applied to the gold film relative to the ITO-coated glass slide. When the alkanethiol self-assembled monolayer (SAM) was introduced into the above NLC cell as the aligning layer, it was able to enhance the forward current significantly, but suppress the reverse current. A current rectification ratio of ~20 was obtained at 1.5 V in the NLC cell with SAM as the aligning layer. Besides, we also characterized the effect of the optical power of 632.8 nm on the asymmetric I/V behaviors in the NLC cells without SAM and with SAM as the aligning layer.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
