Candle Light‐Style Organic Light‐Emitting Diodes |
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| Authors: | Jwo‐Huei Jou Chun‐Yu Hsieh Jing‐Ru Tseng Shiang‐Hau Peng Yung‐Cheng Jou James H Hong Shih‐Ming Shen Ming‐Chun Tang Pin‐Chu Chen Chun‐Hao Lin |
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| Affiliation: | Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Kuang‐Fu Road, Hsin‐Chu 30013, Taiwan, Republic of China |
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| Abstract: | 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. |
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| Keywords: | organic light emitting diodes candle light |
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