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Full-color quantum dots active matrix display fabricated by ink-jet printing

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Abstract

Making full-color active matrix display based on quantum dot light emitting diodes (AM-QLEDs) via ink-jet printing is attractive in display industry due to QLEDs’ wide color gamut and their potential manufacturing advantages of large screen size and low cost. The challenges for realizing AM-QLED display are how to achieve high quality films through ink-jet printing, multi-color patterning, electroluminescence (EL) color purity, and high efficiency. Herein, a 2-inch diagonal full-color AM-QLEDs display with pixel density of 120 pixels per inch (PPI) fabricated by ink-jet printing technique is presented. Driven by a metal oxide TFT (MOTFT) back-panel, the display exhibits a maximum brightness of 400 cd m−2, and a color gamut of 109% (NTSC 1931). The red, green, and blue (RGB) monochrome QLEDs passive matrix panels fabricated by ink-jet printing technique have a current efficiency (CE) of 2.5, 13.9, and 0.30 cd A−1, respectively. To the best of our knowledge, the efficiencies are the highest among passive matrix QLEDs panels made by ink-jet printing technique. The ink-jet printed QDs films show good thickness uniformity due to high viscosity and low volatility of the printable inks, and no cross-contamination between adjacent pixels resulting from the hydrophobic pixel defining layer.

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Acknowledgments

This work was supported by the National Key Basic Research and Development Program of China (2015CB655004), the National Natural Science Foundation of China (U1601651, 51521002, U1301243, 61574061), and the Educational Commission of Guangdong Province (2015B090914003, 2014KZDXM012)

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Authors and Affiliations

  1. State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China

    Congbiao Jiang, Lan Mu, Jianhua Zou, Zhiwei He, Zhenji Zhong, Lei Wang, Miao Xu, Jian Wang, Junbiao Peng & Yong Cao

  2. Guangzhou New Vision Opto-Electronic Technology Co., Ltd., Guangzhou, 510730, China

    Jianhua Zou, Lei Wang & Miao Xu

Authors
  1. Congbiao Jiang
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  2. Lan Mu
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  3. Jianhua Zou
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  4. Zhiwei He
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  5. Zhenji Zhong
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  6. Lei Wang
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  7. Miao Xu
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  8. Jian Wang
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  9. Junbiao Peng
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  10. Yong Cao
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Corresponding author

Correspondence to Junbiao Peng.

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Jiang, C., Mu, L., Zou, J. et al. Full-color quantum dots active matrix display fabricated by ink-jet printing. Sci. China Chem. 60, 1349–1355 (2017). https://doi.org/10.1007/s11426-017-9087-y

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  • DOI: https://doi.org/10.1007/s11426-017-9087-y

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