Browsing by Author "Angelova, Ina"

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FLEXIBLE AND STRETCHABLE OPTOELECTRONIC DEVICES USING GRAPHENE
(2019-01-01)
Chiou, Chung Chin
;
Marinova, Vera
;
Petrov, Stefan
;
Fidanova, Cvetelina
;
Angelova, Ina
In this paper we demonstrate flexible polymer dispersed liquid crystal (PDLC) devices using graphene as transparent conductive electrodes on polyethylene terephthalate (PET) substrate. Graphene was grown by Low Pressure Chemical Vapor Deposition (LPCVD) technique and characterized by Raman analysis, optical and electrical measurements. Several graphene-based PDLC devices have been fabricated and their electro-optical characteristics, response time and bending ability were measured and discussed. The results support the graphene promising features for integration in flexible optoelectronics.
Polymer Dispersed Liquid Crystals Devices on Rigid and Flexible Substrates Using Graphene Electrodes
(2019-01-01)
Angelova, Ina
;
Chiou, Chong Chin
;
Marinova, Vera
;
Lin, Shiuan Huei
;
Petrova, Dimitrina
Polymer Dispersed Liquid Crystal (PDLC) devices on rigid and flexible substrates using graphene as transparent conductive electrodes are fabricated and demonstrated. Graphene is growth by using low pressure Chemical Vapor Deposition (CVD) method on Cu foil and transferred on polyethylene terephthalate (PET) substrates. Electro-optical modulation characteristics of several PDLC devices are measured and discussed. It is found that the transmittance dependence on the driving voltage demonstrates high potential of graphene for next generation ITO-free optoelectronic and display technology.