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Candle Light‐Style Organic Light‐Emitting Diodes
Author(s) -
Jou JwoHuei,
Hsieh ChunYu,
Tseng JingRu,
Peng ShiangHau,
Jou YungCheng,
Hong James H.,
Shen ShihMing,
Tang MingChun,
Chen PinChu,
Lin ChunHao
Publication year - 2013
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201203209
Subject(s) - candle , incandescent light bulb , color rendering index , oled , materials science , optoelectronics , color temperature , luminance , backlight , optics , rendering (computer graphics) , diode , light emitting diode , liquid crystal display , computer graphics (images) , nanotechnology , physics , computer science , electrical engineering , engineering , layer (electronics)
In response to the call for a physiologically‐friendly light at night that shows low color temperature, a candle light‐style organic light emitting diode (OLED) is developed with a color temperature as low as 1900 K, a color rendering index (CRI) as high as 93, and an efficacy at least two times that of incandescent bulbs. In addition, the device has a 80% resemblance in luminance spectrum to that of a candle. Most importantly, the sensationally warm candle light‐style emission is driven by electricity in lieu of the energy‐wasting and greenhouse gas emitting hydrocarbon‐burning candles invented 5000 years ago. This candle light‐style OLED may serve as a safe measure for illumination at night. Moreover, it has a high color rendering index with a decent efficiency.