{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T15:57:37Z","timestamp":1790611057082,"version":"4.1.0"},"reference-count":46,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Top\u2010emitting microcavity organic light\u2010emitting diodes (TE\u2010OLEDs) use a Fabry\u2013Perot cavity to concentrate emission in the forward direction and narrow the electroluminescence spectrum, improving frontal efficiency and color purity. However, internal light extraction remains difficult because steep outcoupling textures can release confined optical modes while increasing local optical\u2010thickness variation, degrading step coverage, and perturbing the cavity\u2010defined angular and spectral response. Here, we introduce a gentle internal corrugation layer (GICL) as a cavity\u2010compatible light\u2010extraction structure for TE\u2010OLEDs and combine it with a tCzphB\u2010Fl\u2010based phosphor\u2010assisted thermally activated delayed fluorescence (TADF)\u2010sensitized fluorescence (pTSF) emissive system. GICL enhances the extraction of confined optical modes while reducing the risk of severe cavity perturbation associated with steep internal textures. The narrowband pTSF emissive system further reinforces the device\u2010level gain because a larger spectral fraction remains aligned with the microcavity resonance band. Under the same optical clear resin (OCR) condition, GICL increases the current efficiency from 302.7 to 378.4\u00a0cd\/A, the power efficiency from 199.3 to 396.7\u00a0lm\/W, and the external quantum efficiency from 34.8% to 69.2%, while reducing the angular color shift at 60\u00b0 from \u0394u\u2032v\u2032\u00a0=\u00a00.0197 to 0.0086. These results support GICL as a cavity\u2010compatible light\u2010extraction route for microcavity TE\u2010OLEDs.<\/jats:p>","DOI":"10.1002\/advs.78013","type":"journal-article","created":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T15:23:38Z","timestamp":1790609018000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Cavity\u2010Compatible Light Extraction in Top\u2010Emitting Microcavity OLEDs via a Gentle Internal Corrugation Layer and Resonance\u2010Matched Narrowband Emission"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-0901-3097","authenticated-orcid":false,"given":"Young Rok","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Information Display Kyung Hee University  Seoul Dongdaemun\u2010Gu Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-0305-5385","authenticated-orcid":false,"given":"Ajay","family":"Nimbalkar","sequence":"additional","affiliation":[{"name":"Department of Information Display Kyung Hee University  Seoul Dongdaemun\u2010Gu Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1295-1693","authenticated-orcid":false,"given":"Min Chul","family":"Suh","sequence":"additional","affiliation":[{"name":"Department of Information Display Kyung Hee University  Seoul Dongdaemun\u2010Gu Republic of 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