ArticleScience advances2026
Intramolecular hydrogen bond enables ultranarrowband multiple resonance luminescence with refined emission profiles.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors.
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Abstract
Ultrahigh-definition displays urgently demand narrowband emitters with ideal Gaussian emission profiles. Multiple resonance (MR) systems are highly competitive yet face a formidable bottleneck: The minimum achievable emission linewidth has become an elusive threshold that cannot be further broken for existing systems. Here, the study proposes a pioneering strategy via intramolecular hydrogen bond construction to break the spectral limit of indolocarbazole (ICz) emitters and develops rotary chiral ICz-fused enantiomeric isomers. This chirality-modified ICz emitter concurrently achieves an emissive peak of 466 nanometers, a full width at half maximum (FWHM) of 56 milli-electron volts, and a suppressed shoulder peak in dilute toluene, impressively achieving the narrowest emission among all reported circularly polarized MR emitters to date. The corresponding electroluminescence device exhibits ultrapure deep-blue emission with a peak wavelength of 469 nanometers and an FWHM of 15 nanometers, as well as high maximum external quantum efficiency of 32.5% with minimal roll-off (20.6% at 10,000 candelas per square meter).
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