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Tuning the color purity of LaAlO3:Eu3+ red phosphor by the cross relaxation

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Abstract

Precisely adjusting the color purity of LaAlO3:Eu3+ red phosphor with 593 and 618 nm emissions is achieved in a strategy of suppressing transitions of high energy levels of Eu3+ ions through varying the doping concentration. As the doping concentration increases, the transitions from high levels 5D3,2,1 will be weakened, while those from 5D0 are enhanced up to a critical value with the aid of the cross relaxation. As a result, an increase of the color purity from 95.2% to 97.4% is obtained. It indicates that the red phosphor could be one of the excellent red-light-emitting phosphors in illuminating and display devices.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China

    Zhi-yong Mao  (毛智勇), Yan-hua Liu  (刘艳花), Qin-ni Fei  (费沁妮), Xi Zheng  (郑玺), Suo-cheng Xu  (徐所成) & Kun Qiu  (仇坤)

  2. Key Laboratory on Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin, 300384, China

    Da-jian Wang  (王达健)

  3. Key Laboratory for Photoelectric Materials and Devices, Tianjin University of Technology, Tianjin, 300384, China

    Zhi-yong Mao  (毛智勇), Da-jian Wang  (王达健), Yan-hua Liu  (刘艳花), Qin-ni Fei  (费沁妮), Xi Zheng  (郑玺), Suo-cheng Xu  (徐所成) & Kun Qiu  (仇坤)

Authors
  1. Zhi-yong Mao  (毛智勇)
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  2. Da-jian Wang  (王达健)
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  3. Yan-hua Liu  (刘艳花)
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  4. Qin-ni Fei  (费沁妮)
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  5. Xi Zheng  (郑玺)
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  6. Suo-cheng Xu  (徐所成)
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  7. Kun Qiu  (仇坤)
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Corresponding author

Correspondence to Da-jian Wang  (王达健).

Additional information

This work has been supported by the National Natural Science Foundation of China (No. 50872091) and the Science and Technology Programs of Tianjin in China (No. 2006ZD30).

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Mao, Zy., Wang, Dj., Liu, Yh. et al. Tuning the color purity of LaAlO3:Eu3+ red phosphor by the cross relaxation. Optoelectron. Lett. 6, 116–119 (2010). https://doi.org/10.1007/s11801-010-9252-y

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  • DOI: https://doi.org/10.1007/s11801-010-9252-y

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