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Proceedings Paper

UV sensors based on liquid crystals mixtures
Author(s): Andro Chanishvili; Gia Petriashvili; Guram Chilaya; Riccardo Barberi; Maria P. De Santo; Mario A. Matranga; F. Ciuchi
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Paper Abstract

The Erythemal Response Spectrum is a scientific expression that describes the sensitivity of the skin to the ultraviolet radiation. The skin sensitivity strongly depends on the UV wavelength: a long exposition to UV radiation causes erythema once a threshold dose has been exceeded. In the past years several devices have been developed in order to monitor the UV exposure, most of them are based on inorganic materials that are able to mimic the human skin behaviour under UV radiation. We present a new device based on liquid crystals technology. The sensor is based on a liquid crystalline mixture that absorbs photons at UV wavelength and emits them at a longer one. This system presents several innovative features: the absorption range of the mixture can be varied to be sensitive to different wavelengths, the luminescence intensity can be tuned, the system can be implemented on flexible devices.

Paper Details

Date Published: 20 April 2006
PDF: 7 pages
Proc. SPIE 6192, Organic Optoelectronics and Photonics II, 619226 (20 April 2006); doi: 10.1117/12.663352
Show Author Affiliations
Andro Chanishvili, Institute of Cybernetics (Georgia)
Gia Petriashvili, Institute of Cybernetics (Georgia)
Guram Chilaya, Institute of Cybernetics (Georgia)
Riccardo Barberi, CNR-Licryl Lab., Univ. of Calabria (Italy)
Maria P. De Santo, CNR-Licryl Lab., Univ. of Calabria (Italy)
Mario A. Matranga, CNR-Licryl Lab., Univ. of Calabria (Italy)
F. Ciuchi, CNR-Licryl Lab., Univ. of Calabria (Italy)

Published in SPIE Proceedings Vol. 6192:
Organic Optoelectronics and Photonics II
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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