Yu, JunhongSharma, ManojLi, MingjieLiu, BaiquanHernandez-Martinez, Pedro LudwigDelikanli, SavasDang, Cuong2025-09-252025-09-2520222666-3864https://doi.org/10.1016/j.xcrp.2022.101049https://hdl.handle.net/20.500.12573/3722Yu, Junhong/0000-0001-6136-552X; Liu, Baiquan/0000-0001-9375-7683;Colloidal quantum wells (CQWs) provide an appealing platform to achieve emissive many-body correlations for novel optoelectronic devices, given that they act as hosts for strong carrier Coulomb interactions and present suppressed Auger recombination. However, the demonstrated high-order excitonic emission in CQWs requires ultrafast pumping with high excitation levels and can only be spec-trally resolved at the single-particle level under cryogenic condi-tions. Here, through systematic investigation using static power -dependent emission spectroscopy and transient carrier dynamics, we show that Cu-doped CdSe CQWs exhibit continuous-wave -pumped high-order excitonic emission at room temperature with a large binding energy of X64 meV. We attribute this unique behavior to dopant excitons in which the ultralong lifetime and the highly localized wavefunction facilitate the formation of many-body corre-lations. The spectrally resolved high-order excitonic emission gener-ated at power levels compatible with solar irradiation and electrical injection might pave the way for novel solution-processed solid-state devices.eninfo:eu-repo/semantics/openAccessArticle10.1016/j.xcrp.2022.1010492-s2.0-85138207712