Scientific Reports (Mar 2023)

Full-color micro-LED display with photo-patternable and highly ambient-stable perovskite quantum dot/siloxane composite as color conversion layers

  • Hyung Cheoul Shim,
  • Juho Kim,
  • So Yeon Park,
  • Bong Sung Kim,
  • Bongkyun Jang,
  • Hak-Joo Lee,
  • Areum Kim,
  • Seungmin Hyun,
  • Jae-Hyun Kim

DOI
https://doi.org/10.1038/s41598-023-31945-6
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 10

Abstract

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Abstract In this paper, we successfully fabricated color conversion layers (CCLs) for full-color-mico-LED display using a perovskite quantum dot (PQD)/siloxane composite by ligand exchanged PQD with silane composite followed by surface activation by an addition of halide-anion containing salt. Due to this surface activation, it was possible to construct the PQD surface with a silane ligand using a non-polar organic solvent that does not damage the PQD. As a result, the ligand-exchanged PQD with a silane compound exhibited high dispersibility in the siloxane matrix and excellent atmospheric stability due to sol–gel condensation. Based on highly ambient stable PQD/siloxane composite based CCLs, full-color micro-LED display has a 1 mm pixel pitch, about 25.4 pixels per inch (PPI) resolution was achieved. In addition, due to the thin thickness of the black matrix to prevent blue light interference, the possibility of a flexible display that can be operated without damage even with a bending radius of 5 mm was demonstrated.