Luminescent concentrator design for displays with high ambient contrast and efficiency

ÇİFÇİ O. S., Yoder M. A., Xu L., Chen H., Beck C. J., He J., ...More

Nature Photonics, vol.17, no.10, pp.872-877, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 10
  • Publication Date: 2023
  • Doi Number: 10.1038/s41566-023-01281-2
  • Journal Name: Nature Photonics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Biotechnology Research Abstracts, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC
  • Page Numbers: pp.872-877
  • Yozgat Bozok University Affiliated: Yes

Abstract

A key display characteristic is its efficiency (emitted light power divided by input power). Although display efficiencies are being improved through emissive (for example, quantum dot and organic light-emitting) display designs, which remove the highly inefficient colour filters found in traditional liquid crystal displays, polarization filters, which block about 50% light, remain necessary to inhibit ambient light reflection. We introduce a luminescent concentrator design to replace both colour and polarization filters. Narrow-band, large-Stokes-shift, CdSe/CdS quantum dot emitters are embedded in a luminescent concentrator pixel element with a small top aperture. The remainder of the top surface is coated black, reducing ambient light reflection. A single pixel demonstrates an extraction efficiency of 40.9% from a pixel with an aperture opening of 11.0%. A simple proof-of-concept multipixel array is demonstrated.