Highly Efficient Full-Color Inorganic LEDs on a Single Wafer by Using Multiple Adhesive Bonding

Embargo End Date
2022-06-27

Type
Article

Authors
Mun, Seung-Hyun
Kang, Chang-Mo
Min, Jung-Hong
Choi, Soo-Young
Jeong, Woo-Lim
Kim, Gi-Gwan
Lee, Je-Sung
Kim, Kyung-Pil
Ko, Heung Cho
Lee, Dong-Seon

KAUST Department
Photonics Laboratory King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia

Online Publication Date
2021-06-27

Print Publication Date
2021-07

Date
2021-06-27

Submitted Date
2021-01-07

Abstract
Monolithic integration is a promising way to realize full-color high-resolution displays. However, it is still a challenge to realize a highly efficient full-color light-emitting diode (LED) adopting color conversion layer. In this work, red, green, and blue inorganic LED thin films grown on respective substrates for high-quality epitaxial layers are integrated on a single substrate using a multiple adhesive bonding technique. It is verified that the stacked thin films are structurally stable. After the multiple bonding, respective subpixels are formed by using standard photolithography only without a mass transfer process, showing the possibility of applying them to a high-resolution micro-LED display. Even after the bonding, the device still maintains high efficiency without deteriorating performance. The integrated subpixels are not only independently operated by controlling input power, but the light emission can also cover a wide range of the color space, about 83% compared to Rec.2020 color space.

Citation
Mun, S., Kang, C., Min, J., Choi, S., Jeong, W., Kim, G., … Lee, D. (2021). Highly Efficient Full-Color Inorganic LEDs on a Single Wafer by Using Multiple Adhesive Bonding. Advanced Materials Interfaces, 2100300. doi:10.1002/admi.202100300

Acknowledgements
This work was supported by the Technology Innovation program (20004946) funded by Ministry of Trade, Industry and Energy (MOTIE, Korea) and Samsung Electronics.

Publisher
Wiley

Journal
Advanced Materials Interfaces

DOI
10.1002/admi.202100300

Additional Links
https://onlinelibrary.wiley.com/doi/10.1002/admi.202100300

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