DOE OSTI · 3377135
Strategy for Ultranarrow Light Down-Conversion for Displays Based on Bicolor-Emitting 2D Colloidal Heterostructures
Abstract
The demand for ultranarrow spectral emission below 10 nm is critical for next-generation displays. Although current colloidal nanocrystals are successful in light down-conversion applications, they fall short in matching the stringent color purity requirements set by standards like Rec. 2020. Achieving such narrow linewidths through material engineering alone remains elusive, necessitating innovative light management strategies that avoid optical losses and maintain device efficiency. Here, in this work, we present a novel 2D colloidal heterostructure design, combining a CdSe core nanoplatelet, a CdS crown, and a CdZnS shell, to achieve bright bicolor emission in the solid state (green/red) emission with tunable intensity ratios controlled by excitation power (either optical or electrical). Integration of these nanoplatelets into a dielectric cavity further narrows the emission linewidth to sub-2 nm while enhancing the photoluminescence intensity by up to 200 times, meeting the Rec. 2020 color purity targets. This approach paves the way for a strategy avoiding complex laser-based solutions.
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Oh, Jisoo [Sorbonne Univ., Paris (France); Ecole Superieure de Physique et de Chimie Industrielles (ESPCI), ParisTech (France); Centre National de la Recherche Scientifique (CNRS) (France)], Roh, Jiho [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)] (ORCID:0009000397382008), Gureghian, Clément [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)], Mastrippolito, Dario [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)] (ORCID:0000000163607254), Cavallo, Mariarosa [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)], Paye, Marco [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)], Xu, Xiang Zhen [Sorbonne Univ., Paris (France); Ecole Superieure de Physique et de Chimie Industrielles (ESPCI), ParisTech (France); Centre National de la Recherche Scientifique (CNRS) (France)], Gage, Thomas E. [Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)], Menguy, Nicolas [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)], Lafosse, Xavier [Univ. Paris-Saclay, Palaiseau (France); Centre National de la Recherche Scientifique (CNRS) (France)], Silly, Mathieu G. [Synchrotron SOLEIL, Gif-sur-Yvette (France)] (ORCID:0000000203028442), Pierucci, Debora [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)] (ORCID:0000000187511994), Lhuillier, Emmanuel [Sorbonne Univ., Paris (France); Centre National de la Recherche Scientifique (CNRS) (France)] (ORCID:0000000325821422), Climente, Juan I. [Universitat Jaume I, Castelló (Spain)], Diroll, Benjamin T. [Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)], Ithurria, Sandrine [Sorbonne Univ., Paris (France); Ecole Superieure de Physique et de Chimie Industrielles (ESPCI), ParisTech (France); Centre National de la Recherche Scientifique (CNRS) (France)] (ORCID:0000000247339883). 2026-06-16. Strategy for Ultranarrow Light Down-Conversion for Displays Based on Bicolor-Emitting 2D Colloidal Heterostructures. https://doi.org/10.1021/acs.nanolett.6c01589
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