Advanced Materials

White-Light-Emitting Diodes with Quantum Dot Color Converters for Display Backlights

Authors

  • Eunjoo Jang,

    Corresponding author
    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
    • Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea).
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  • Shinae Jun,

    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
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  • Hyosook Jang,

    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
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  • Jungeun Lim,

    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
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  • Byungki Kim,

    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
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  • Younghwan Kim

    1. Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 449-712 (Republic of Korea)
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Abstract

Highly luminescent, multiply passivated green- and red-light-emitting quantum dots are used as color converters in InGaN blue LEDs to achieve external quantum efficiencies of 72% and 34%, respectively. White QD-LEDs prepared for a display backlight are shown to have an efficacy of 41 lm W−1 and color reproducibility of 100% compared to the NTSC standard in CIE 1931. Finally, a 46 inch LCD TV panel (see image) using the QD-LED backlight is successfully demonstrated for the first time.

original image

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