Designing Sub-10 nm Non-Coherent Nanocrystal-Based LED Using Dielectric Cavity

2026-06-05

PRE

Jiho Roh

Jisoo Oh

Clément Gureghian

Diogo Almeida

Albin Colle

Dario Mastrippolito

Marco Paye

Mariarosa Cavallo

Xiang Zhen Xu

Claire Abadie

Bruno Gallas

Xavier Lafosse

Debora Pierucci

Sandrine Ithurria

Emmanuel Lhuillier *

DOI：10.1021/acsphotonics.6c00106

Original

Original request for help

Save

Abstract

En 中文

Achieving ultranarrow emission linewidths below 10 nm is a critical challenge for next-generation displays. While colloidal nanocrystals (NCs) offer exceptional color purity, their intrinsic emission linewidths typically exceed 20 nm, limiting their potential for next-generation displays. Here, we demonstrate a noncoherent nanocrystal-based light-emitting diode (LED) with sub-10 nm emission by integrating quasi-2D nanoplatelets (NPLs) into a dielectric cavity. The cavity relies on a very high-reflectivity Bragg mirror that spectrally shapes the electroluminescence (EL) of the NPLs, reducing the full width at half-maximum (FWHM) down to 2.8 nm. This approach overcomes the intrinsic broadening of NCs and enables tunable emission across the visible spectrum by adjusting the cavity’s thickness. Operando characterization reveals that the EL linewidth is primarily limited by inhomogeneities in cavity thickness, which can be mitigated by reducing pixel size, a trend aligned with the development of micro-LEDs. This work paves the way for ultranarrow emission devices, with potential extensions to green and blue wavelengths.

Keywords:

Cavities

Diodes

Layers

Quantum dots

Thickness

Nanocrystals

LED

dielectric cavity

electroluminescence

Designing Sub-10 nm Non-Coherent Nanocrystal-Based LED Using Dielectric Cavity

Abstract

Journal

Organization

Cited Papers

Citing Papers