Characterization of a liquid crystal/dye cell for a future application in display-integrated photovoltaics

Ichiro Fujieda; Shunsuke Itaya; Masamichi Ohta; Shintaro Ozawa; Nada Dianah Binti M. Azmi

doi:10.1117/1.JPE.6.028001

20 May 2016 Characterization of a liquid crystal/dye cell for a future application in display-integrated photovoltaics

Ichiro Fujieda, Shunsuke Itaya, Masamichi Ohta, Shintaro Ozawa, Nada Dianah Binti M. Azmi

Author Affiliations +

Journal of Photonics for Energy, Vol. 6, Issue 2, 028001 (May 2016). https://doi.org/10.1117/1.JPE.6.028001

Abstract

One can convert a luminescent solar concentrator to a display by scanning a laser beam on it. When a guest–host system of liquid crystal (LC) and dye materials are incorporated, absorption of excitation light and the radiation pattern of photoluminescence (PL) can be adjusted to changes in lighting condition. The resolution of a displayed image can be degraded by PL spreading in the LC/dye layer. Its contrast can be limited by the PL induced by ambient light. In the experiment, we fabricated a 22×25 mm² cell that contained 0.5 wt. % coumarin 6 in a nematic LC host. The alignment was antiparallel and the gap was 6 μm. Using a blue laser beam of 0.04 mm FWHM, the PL intensity distribution was measured to be 0.20 mm FWHM at zero bias. It became slightly wider at 10 V. For contrast evaluation, we measured PL spectra under two conditions. First, the center of the cell was irradiated by a 1.7-mW blue laser beam. Second, the whole cell was uniformly exposed to light from a fluorescent lamp at illuminance of 800lx. The contrast of luminance was calculated to be 1.4×10⁵. The optical power reaching its edge surfaces was measured and roughly agreed with the prediction by a simple model.

Citation Download Citation

Ichiro Fujieda, Shunsuke Itaya, Masamichi Ohta, Shintaro Ozawa, and Nada Dianah Binti M. Azmi "Characterization of a liquid crystal/dye cell for a future application in display-integrated photovoltaics," Journal of Photonics for Energy 6(2), 028001 (20 May 2016). https://doi.org/10.1117/1.JPE.6.028001

Published: 20 May 2016

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available