Superior fast switching of liquid crystal devices using graphene quantum dots

作者：Cho Min Jae; Park Hong Gyu; Jeong Hae Chang; Lee Jae Won; Jung Yoon Ho; Kim Dai Hyun; Kim Jeong Hwan; Lee Jin Woo; Seo Dae Shik^*

来源：Liquid Crystals, 2014, 41(6): 761-767.

DOI：10.1080/02678292.2014.889233

• liquid crystal
• graphene
• quantum dot
• electro-optical properties

We report the doping effect of graphene quantum dots (QDs) in a nematic liquid crystal (NLC) device. The use of graphene QDs leads to improved electro-optical (EO) properties, such as faster response times and a decreased threshold voltage. A 14.8% reduction in the threshold voltage (3.165V), a 30% decrease in the falling time (4.9ms) and a 63.6% decrease in the rising time (2.4ms) were observed for twisted nematic (TN) LC devices (LCDs) that were doped with QDs. We confirm that the doping of the TN-LCD with graphene QDs reduces the field-screening effect, which is caused by impurity ions, whereas the other properties of conventional TN-LCDs are maintained.

• 出版日期2014-6-3