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Journal of Organic & Inorganic Chemistry
ISSN 2472-1123
2
n d
E d i t i o n o f E u r o S c i C o n C o n f e r e n c e o n
Chemistry
F e b r u a r y 1 9 - 2 0 , 2 0 1 9
P r a g u e , C z e c h R e p u b l i c
Chemistry 2019
I
ntense white light consisting of blue or violet emission might cause damage to human eyes, suppress melatonin-secretion,
disrupt circadian rhythm and ecosystems, discolour artifacts, and pollute the night skies. Developing a blue hazard free lighting
with high lightquality and energysaving character is highly demanding and challenging. So far, organic light-emitting diodes
(OLEDs) have proven to be a great lighting measure that is friendly to human, environments and ecologies with energy-efficient
and high-quality character besides being mercuryfree and having extremely high spectrum tailoring capability. In this study,
the developed candlelight-style OLED consisting of multiple blackbody-radiation complementary organic emitters, namely sky-
blue, green, yellow, and deep-red and provide a very-high spectrum resemblance index with respect to natural light, i.e. >90.
Specifically, the resultant OLED showed a low colour temperature (<1,900 K), whose melatonin suppression sensitivity is only
3% relative to that of a 480 nm blue light. Its maximum retina permissible exposure limit is 3,454 seconds at 100 lx, 11, 10 and 6
times longer and safer than the counterparts of a compact fluorescent lamp (5,920 K), light emitting diode (5,500 K) and OLED
(5,000 K). Additionally, its high device efficacy and long operation lifetime enable commercialization feasibility. The fabricated
candlelight-style OLED can be an ideal lighting measure for indoor as well as outdoor illumination purpose due to its friendly
nature to human and ecosystems.
jjou@mx.nthu.edu.twCandlelightstyle organic light-emitting diode
enabling blue hazard free lighting
Jwo Huei Jou and Meenu Singh
National Tsing Hua University, Hsinchu Taiwan
J Org Inorg Chem 2019, Volume: 5
DOI: 10.21767/2472-1123-C1-021