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However, a strategy capable of simultaneously controlling multiple parameters including color purity, directionality, polarization, and optoelectronic efficiency has remained an unmet challenge in OLED development. Herein, we demonstrate a blue\u2010emitting OLED that combines high color purity with highly directional transverse\u2010electric (TE)\u2010polarized emission, realized through a strongly photon\u2010photon mode\u2010coupled microcavity architecture. By hybridizing the second\u2010order Fabry\u2010Perot mode with the first\u2010order grating microcavity mode, the system achieves strong coupling with a mode splitting energy of 321 me. Consequently, the resulting polarized OLED exhibits outstanding performance including a transverse\u2010electric\/transverse\u2010magnetic polarization extinction ratio of 17.3\u00a0dB, an external quantum efficiency of 3.4%, and a narrow full width at half maximum of 17.0\u00a0nm with an angular distribution of 10\u00b0. These findings validate the practical viability of microcavity coupling for advancing optoelectronic devices, particularly in display technologies and photonic integration.<\/jats:p>","DOI":"10.1002\/adma.202521853","type":"journal-article","created":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T12:00:56Z","timestamp":1785240056000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Strong Coupling Hybrid Modes for Narrow\u2010band, Directional and Polarized OLEDs"],"prefix":"10.1002","volume":"38","author":[{"given":"Ruixiang","family":"Chen","sequence":"first","affiliation":[{"name":"School of Physics and Optoelectronic Engineering Beijing University of Technology  Beijing P. R. China"},{"name":"School of Electronics and Information Engineering Hebei University of Technology  Tianjin P. R. 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