Nanoscale heterophase regulation enables sunlight-like full-spectrum white electroluminescence.
basic_science · Level V
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- Record sourced from PubMed, PMID 40240333.
- Also identified by DOI 10.1038/s41467-025-58743-0 and PMC identifier 12003789.
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Abstract
Traditional white light-emitting diodes operate by exciting phosphors using blue light-emitting diodes, leading to the absence of specific colour bands compared with the visible light region of the sunlight spectrum (400-780 nm), and excess blue light increases the risk of harmful effects on ecosystems and organisms. Here, we precisely design and regulate heterophase γ/δ-CsPb(I/Cl)<sub>3</sub> at the nanoscale for uniform heterophase distribution, balanced flow of charges and tunable spectrum. Then, γ/δ-CsPb(I/Cl)<sub>3</sub> directly excited by electricity shows full-spectrum white electroluminescence covering 400-780 nm with standard Commission Internationale de l'Eclairage coordinates of (0.33, 0.33), a Colour Rendering Index of 95, a Correlated Colour Temperature of 5829 K and a Delta u,v of -3 × 10<sup>-4</sup>, accompanied with balanced white light composition (Melanopic ratio = 1.004). The match indices of such five core indicators to standard sunlight reach 100%, 95% (97% for R<sub>9</sub>), 99.5%, 99.97% and 99.6%, respectively, far ahead of as-fabricated commercial white light-emitting diodes.