Optical Response Features of LC Cells Doped with CdSe/ZnS Quantum Dots

• Published in: Molecular Crystals and Liquid Crystals Vol. 615; no. 1; pp. 57 - 62
• Main Authors: Galin, I. F., Konshina, E. A.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 03-07-2015; Taylor & Francis Ltd
• Subjects: Anisotropy; Cadmium selenides; Cells; Dielectrics; Intermetallics; Liquid crystal polymers; Liquid crystals; Nematic liquid crystals; Quantum dots; Response time; Semiconductor doping; semiconductor quantum dots; Semiconductors; Voltage; Zinc sulfides
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2015.1066955

We investigated the optical response times of the LC cells with a nematic liquid crystal with positive dielectric anisotropy doped with 3.5 nm semiconductor quantum dots CdSe/ZnS. We observed that the optical response times of LC cells doped with 1 and 2 mg/ml QDs decreased significantly after one month in comparison with initial. The turn-on time at a wavelength of 1.55 μm of the twist cell with a thickness of 8 μm, filled with the suspension of the LC and 1 mg/ml QDs was about 200 μs. It is shown that using a unipolar square wave voltage decreasing response time of the liquid crystal cell.