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.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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This work was supported by the US Department of Energy ‘Photonics at Thermodynamic Limits’ Energy Frontier Research Center under grant DE-SC0019140.
The authors declare no competing interests.
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Cifci, O.S., Yoder, M.A., Xu, L. et al. Luminescent concentrator design for displays with high ambient contrast and efficiency. Nat. Photon. 17, 872–877 (2023). https://doi.org/10.1038/s41566-023-01281-2