Journal of Physical Chemistry & Biophysics
Open Access

Can OLED light-quality be good enough to justify lighting renaissance?

3^rd International Conference and Exhibition on Lasers, Optics & Photonics

September 01-03, 2015 Valencia, Spain

Jwo-Huei Jou

National Tsing Hua University, Taiwan

Scientific Tracks Abstracts: J Phys Chem Biophys

Abstract :

Hydrocarbon-burning lighting measures, such as candles, oil lamps or torches, provide pleasantly warm-sensation, but are energy-wasting with problems like burning, carbon-blacking, flickering, oxygen consumption, and carbon-dioxide emission etc. Whilst, electricity-driven light sources, such as fluorescent tubes and LEDs, are energy-saving, but may cause blue hazards, including discoloring the paintings of van Gogh and Cezanne, irreparable damage to the retina of human eyes, and suppression of melatonin secretion etc. Notably, â�?�?Electric light at night may explain a portion of the breast cancerâ�?; as reported by Stevens et al. in 2014. Undoubtedly, there is an urgent need for a blue-hazard free lighting source to safeguard human health. However, challenges arise for such a lighting source as high light-quality is desired while meeting the power-saving trend. Could one have an energy-saving, healthy lighting source with high light-quality to initiate lighting renaissance? To demonstrate such a possibility, we employ OLED technique with a high band-number of candlelight emission complementary emitters to fabricate a high quality, energy-saving and blue-hazard free OLED. The candle light emitting OLED can exhibit an approaching 90 color rendering index or an above 90 natural light spectrum resemblance index (SRI), with a power-efficiency at least 300 times that of candles at colortemperature below 2,000K. Most importantly, it shows a much lower melatonin suppression impact than candles, based on the same luminance level. It is indicated that the candle light-style OLED is physiologically-safer than candles, and the safest among all electricity-driven lighting sources ever.

Biography :

Jwo-Huei Jou received his PhD in 1986 from University of Michigan, Ann Arbor, Michigan, USA, and worked as a Post-doctoral visiting scientist at IBM-Almaden Research Center, CA, USA, till 1988 before becoming a faculty in NTHU. He chaired the department from 2006 to 2009. He has published more than 120 journal papers and filed and/or been issued more than 60 patents, and has been serving as an Editor of Fluorescent Materials.

Email: jjou@mx.nthu.edu.tw