Candle Light-Style Organic Light-Emitting Diodes

Authors

  • Jwo-Huei Jou,

    Corresponding author
    1. Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsin-Chu 30013, Taiwan, Republic of China
    • 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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  • Chun-Yu Hsieh,

    1. 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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  • Jing-Ru Tseng,

    1. 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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  • Shiang-Hau Peng,

    1. 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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  • Yung-Cheng Jou,

    1. 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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  • James H. Hong,

    1. 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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  • Shih-Ming Shen,

    1. 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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  • Ming-Chun Tang,

    1. 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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  • Pin-Chu Chen,

    1. 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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  • Chun-Hao Lin

    1. 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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