Double-crowned 2D semiconductor nanoplatelets with bicolor power-tunable emission

• DOI: 10.1038/s41467-022-32713-2
• Publication Date: 2022-08-30T11:04:52Z
• Authors: Corentin Dabard; Victor Guilloux; Charlie Gréboval; Hong Po; Lina Makke; Ningyuan Fu; Xiang Zhen Xu; Mathieu G. Silly; Gilles Patriarche; Emmanuel Lhuillier; Thierry Barisien; Juan I. Climente; Benjamin T. Diroll; Sandrine Ithurria
• Keywords: Auger effect; Saturation (graph theory)

Abstract Nanocrystals (NCs) are now established building blocks for optoelectronics and their use as down converters large gamut displays has been first mass market. NC integration relies on a combination of green red NCs into blend, which rises post-growth formulation issues. A careful engineering the may enable dual emissions from single population violates Kasha’s rule, stipulates that emission should occur at band edge. Thus, in addition to an attentive control alignment obtain signals, non-radiative decay paths also have be carefully slowed away ground state. Here, we demonstrate core/crown/crown 2D nanoplatelets (NPLs), made CdSe/CdTe/CdSe, can combine volume type-II enabling simultaneously narrow emissions. Moreover, ratio two tuned by incident power, results saturation due Auger recombination affects this much stronger than one. Finally, show dual-color, power tunable, obtained through electrical excitation.