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Cesium lead halide perovskite quantum dot-based warm white light-emitting diodes with high color rendering index

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Abstract

White light-emitting diodes (WLEDs) were fabricated by employing a combination of a commercial yellow emission Ce3+-doped Y3Al5O12 (YAG:Ce)-based phosphor and all-inorganic perovskite quantum dots pumped with blue LED chip. Perovskite quantum dot solution was used as the color conversion layer with liquid-type structure. Red-emitting materials based on cesium lead halide (CsPb(X)3) perovskite quantum dots were introduced to generate WLEDs with high efficacy and high color rendering index through compensating the red emission of the YAG:Ce phosphor-based commercialized WLEDs. The experimental results suggested that the luminous efficiency and color rendering index of the as-prepared WLED device could reach up to 84.7 lm/W and 89, respectively. The characteristics of those devices including correlated color temperature (CCT), color rendering index (CRI), and color coordinates were observed under different forward currents. The as-fabricated warm WLEDs showed excellent color stability against the increasing current, while the color coordinates shifted slightly from (0.3837, 0.3635) at 20 mA to (0.3772, 0.3592) at 120 mA and color temperature tuned from 3803 to 3953 K.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos. 51502109, 21573094, 11274142, and 11474131), the Open Project of State Key Laboratory of Superhard Materials (Jilin University), the National Found for Fostering Talents of Basic Science (No. J1103202), and the Chinese Scholarship Council for providing financial support during visiting University of California at Irvine.

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Authors and Affiliations

  1. Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, 130012, People’s Republic of China

    Ke Bi, Dan Wang, Peng Wang, Bin Duan, Tieqiang Zhang, Yinghui Wang & Hanzhuang Zhang

  2. State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, People’s Republic of China

    Yu Zhang

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  1. Ke Bi
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  2. Dan Wang
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  3. Peng Wang
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  4. Bin Duan
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  5. Tieqiang Zhang
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  6. Yinghui Wang
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  7. Hanzhuang Zhang
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  8. Yu Zhang
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Correspondence to Dan Wang or Yu Zhang.

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Bi, K., Wang, D., Wang, P. et al. Cesium lead halide perovskite quantum dot-based warm white light-emitting diodes with high color rendering index. J Nanopart Res 19, 174 (2017). https://doi.org/10.1007/s11051-017-3862-2

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