Advanced Materials

White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors

Authors

  • Ho Seong Jang,

    1. Department of Materials Science and Engineering, KAIST 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Heesun Yang,

    1. Department of Materials Science and Engineering Hongik University 72-1, Sangsu-dong, Mapo-gu, Seoul 121-791 (Korea)
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  • Sung Wook Kim,

    1. Department of Materials Science and Engineering, KAIST 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Ji Yeon Han,

    1. Department of Materials Science and Engineering, KAIST 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Sang-Geun Lee,

    1. Strategy Technology Research Department Korea Minting & Security Printing Corporation Technical Research Institute 35 Gajeong-dong, Yuseong-gu, Daejeon 305-713 (Korea)
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  • Duk Young Jeon

    Corresponding author
    1. Department of Materials Science and Engineering, KAIST 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
    • Department of Materials Science and Engineering, KAIST 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea).===

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  • This work was supported by the Korea Minting & Security Printing Corporation (KOMSCO) and the second stage of the Brain Korea 21 Project. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

White LEDs are fabricated through a combination of blue LEDs with Sr3SiO5:Ce3+,Li+ phosphors and organically capped CdSe quantum dots (QDs), which exhibit a 2D superlattice. The combination of blue emission from the LEDs, greenish-yellow emission from the phosphors, and red emission from the QDs generates white light. As-synthesized white LEDs show excellent color rendering properties and stable color coordinates against increasing forward bias currents (see figure).

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