• Opto-Electronic Advances
  • Vol. 4, Issue 4, 210022-1 (2021)
Xiaotong Fan1, Tingzhu Wu1、2, Bin Liu3, Rong Zhang1、3, Hao-Chung Kuo4、*, and Zhong Chen1、2
Author Affiliations
  • 1School of Electronic Science and Engineering, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China
  • 2Fujian Science & Technology Innovation Laboratory for Energy Materials of China, Xiamen 361005, China
  • 3Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Nanjing National Laboratory of Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
  • 4Department of Photonics and Graduate Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, Chiao Tung University, Hsinchu 30010, China.
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    DOI: 10.29026/oea.2021.210022 Cite this Article
    Xiaotong Fan, Tingzhu Wu, Bin Liu, Rong Zhang, Hao-Chung Kuo, Zhong Chen. Recent developments of quantum dot based micro-LED based on non-radiative energy transfer mechanism[J]. Opto-Electronic Advances, 2021, 4(4): 210022-1 Copy Citation Text show less

    Abstract

    With regard to micro-light-emitting diodes (micro-LEDs), their excellent brightness, low energy consumption, and ultra-high resolution are significant advantages. However, the large size of traditional inorganic phosphors and the number of side defects have restricted the practical applications of small sized micro-LEDs. Recently, quantum dot (QD) and non-radiative energy transfer (NRET) have been proposed to solve existing problems. QDs possess nanoscale dimensions and high luminous efficiency, and they are suitable for NRET because they are able to nearly contact the micro-LED chip. The NRET between QDs and micro-LED chip further improves the color conversion efficiency (CCE) and effective quantum yield (EQY) of full-color micro-LED devices. In this review, we discuss the NRET mechanism for QD micro-LED devices, and then nano-pillar LED, nano-hole LED, and nano-ring LED are introduced in detail. These structures are beneficial to the NRET between QD and micro-LED, especially nano-ring LED. Finally, the challenges and future envisions have also been described.
    $ \mathrm{\eta }={{\mathrm{\tau }}_{\rm{r}}\left({\mathrm{\tau }}_{\rm{ET}}+\frac{1}{{\mathrm{\tau }}_{\rm{r}}}\right)}^{-1} \;,$(1)

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    $ {\mathrm{\tau }}_{\rm{r}}={\left(\frac{1}{{\mathrm{\tau }}_{{\rm{rr}}}}+\frac{1}{{\mathrm{\tau }}_{{\rm{nr}}}}\right)}^{-1}\;, $(2)

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    $ CCE\approx {\mathrm{P}\mathrm{L}\mathrm{Q}\mathrm{Y}}_{{\rm{QD}}}\frac{{k}_{{\rm{ET}}}}{{k}_{{\rm{QW}}}^{{\rm{rad}}}}\;, $(3)

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    $ {PLQY}_{{\rm{QD}}}=\frac{{E}_{{\rm{em}}}}{{E}_{{\rm{abs}}}}\;, $(4)

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    $ \mathrm{E}\mathrm{Q}\mathrm{Y}=\frac{Area2}{Area1}\;, $(5)

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    Xiaotong Fan, Tingzhu Wu, Bin Liu, Rong Zhang, Hao-Chung Kuo, Zhong Chen. Recent developments of quantum dot based micro-LED based on non-radiative energy transfer mechanism[J]. Opto-Electronic Advances, 2021, 4(4): 210022-1
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