npj Flexible Electronics (Dec 2022)

Flexible micro-LED display and its application in Gbps multi-channel visible light communication

  • Luhing Hu,
  • Jaeyong Choi,
  • Sumin Hwangbo,
  • Do-Hoon Kwon,
  • Bongkyun Jang,
  • Seunghyeon Ji,
  • Jae-Hyun Kim,
  • Sang-Kook Han,
  • Jong-Hyun Ahn

DOI
https://doi.org/10.1038/s41528-022-00234-z
Journal volume & issue
Vol. 6, no. 1
pp. 1 – 7

Abstract

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Abstract A flexible full-color micro-LED display with high mechanical robustness was fabricated by printing quantum dots (QDs) on a blue micro-LED array using standard photolithography. The red and green colors yielded from QDs exhibit a better color gamut than conventional color filters. The light conversion efficiency was enhanced by adding TiO2 nanoparticles to the QD-photoresist composite. This full-color micro-LED display was successfully mounted on various unusual substrates such as curved glass, fabrics, and human skin, enabling diverse optoelectronic applications. In addition, wireless multi-channel visible light communication (VLC) based on the wavelength-division-multiplexing orthogonal-frequency-division-multiplexing (WDM-OFDM) technique was demonstrated using a QD-based color micro-LED panel. A high data transmission rate of 1.9 Gbps was successfully obtained owing to the high electrical–optical modulation bandwidth of the QD-based micro-LED panel.