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Nano Research 2022, 15(7): 6477-6482 https://doi.org/10.1007/s12274-022-4204-y
Research Article | Issue | Published: 28 March 2022

Quantum-dot and organic hybrid light-emitting diodes employing a blue common layer for simple fabrication of full-color displays

Show Author's Information Suhyeon Lee1,2,  Donghyo Hahm3,  Suk-Young Yoon4,  Heesun Yang4,  Wan Ki Bae3,  Jeonghun Kwak1,2( )
Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
Inter-university Semiconductor Research Center (ISRC), Seoul National University, Seoul 08826, Republic of Korea
SKKU Advanced Institute of Nanotechnology (SAINT), School of Nano Science & Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
Department of Materials Science and Engineering, Hongik University, Seoul 04066, Republic of Korea
Keywords:
quantum-dot light-emitting diode (QLEDs), organic light-emitting diode, blue common layer, full-color display, reduced process step
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Nano device
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Lee S, Hahm D, Yoon S-Y, et al. Quantum-dot and organic hybrid light-emitting diodes employing a blue common layer for simple fabrication of full-color displays. Nano Research, 2022, 15(7): 6477-6482. https://doi.org/10.1007/s12274-022-4204-y
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Abstract Full text Electronic supplementary material About this article

Colloidal quantum-dot (QD) light-emitting diodes (QLEDs) have been in the forefront of future display devices due to their outstanding optoelectronic properties. However, a complicated solution-process for patterning the red, green, and blue QDs deteriorates the QLED performance and limits the resolution of full-color displays. Herein, we report a novel concept of QD–organic hybrid light-emitting diodes by introducing an organic blue common layer (BCL) which is deposited through a common mask over the entire sub-pixels. Benefitted from the optimized device structure, red and green QLEDs retained their color coordinates despite the presence of the BCL. Furthermore, adopting the BCL improved the external quantum efficiency of green and red QLEDs by 38.4% and 11.7%, respectively, due to the Förster resonance energy transfer from the BCL to the adjacent QD layers. With the BCL structure, we could simply demonstrate a full-color QD–organic hybrid device in a single substrate. We believe that this device architecture is practically applicable for easier fabrication of solution-processed, high-resolution, and full-color displays with reduced process steps.


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About this article

Quantum-dot and organic hybrid light-emitting diodes employing a blue common layer for simple fabrication of full-color displays

Show Author's information Suhyeon Lee1,2, Donghyo Hahm3, Suk-Young Yoon4, Heesun Yang4, Wan Ki Bae3, Jeonghun Kwak1,2( )
Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea
Inter-university Semiconductor Research Center (ISRC), Seoul National University, Seoul 08826, Republic of Korea
SKKU Advanced Institute of Nanotechnology (SAINT), School of Nano Science & Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
Department of Materials Science and Engineering, Hongik University, Seoul 04066, Republic of Korea

Abstract

Colloidal quantum-dot (QD) light-emitting diodes (QLEDs) have been in the forefront of future display devices due to their outstanding optoelectronic properties. However, a complicated solution-process for patterning the red, green, and blue QDs deteriorates the QLED performance and limits the resolution of full-color displays. Herein, we report a novel concept of QD–organic hybrid light-emitting diodes by introducing an organic blue common layer (BCL) which is deposited through a common mask over the entire sub-pixels. Benefitted from the optimized device structure, red and green QLEDs retained their color coordinates despite the presence of the BCL. Furthermore, adopting the BCL improved the external quantum efficiency of green and red QLEDs by 38.4% and 11.7%, respectively, due to the Förster resonance energy transfer from the BCL to the adjacent QD layers. With the BCL structure, we could simply demonstrate a full-color QD–organic hybrid device in a single substrate. We believe that this device architecture is practically applicable for easier fabrication of solution-processed, high-resolution, and full-color displays with reduced process steps.

Keywords: quantum-dot light-emitting diode (QLEDs), organic light-emitting diode, blue common layer, full-color display, reduced process step

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Acknowledgements

Publication history

Received: 30 November 2021
Revised: 25 January 2022
Accepted: 26 January 2022
Published: 28 March 2022
Issue date: July 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the Technology Innovation Program (Nos. 20010371 and 20010737) and the Industrial Core Technology Development Program (No. 10077471) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).

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