Blueprints for Brightness: A Trilogy of Locking, Substitution, and Extension Strategies in Carbonyl–Nitrogen-Based MR-TADF Emitters
學年 114
學期 1
出版（發表）日期 2025-10-28
作品名稱 Blueprints for Brightness: A Trilogy of Locking, Substitution, and Extension Strategies in Carbonyl–Nitrogen-Based MR-TADF Emitters
作品名稱（其他語言）
著者 K. R. Justin Thomas; Vignesh Rajendran; Chih-Hsin Chen
單位
出版者
著錄名稱、卷期、頁數 ChemPhotoChem 9(12) , p. e202500276
摘要 Multiresonant thermally activated delayed fluorescence (MR-TADF) materials have emerged as next-generation OLED emitters owing to their narrowband emission, high color purity, and potential for 100% exciton utilization. Among the various MR-TADF scaffolds, carbonyl/nitrogen-based, quinolino[3,2,1-de]acridine-5,9-dione (QAO) cores have attracted significant attention due to their modularity and electronic tunability. This review article presents a systematic analysis of recent advancements in QAO-based emitters, categorized into three molecular design strategies: core locking, core substitution, and core extension. Core locking enhances rigidity, minimizes vibrational loss, and narrows emission profiles critically mandated by blue-emitting MR-TADF systems. Substitution at key positions enables fine control over emission wavelength, ΔEST, and photoluminescence quantum yield (ΦPL). Core extension via π-conjugation elongation or fused aromatic units leads to improved device efficiencies and diverse emission colors, including green and deep-blue electroluminescence. Collectively, these strategies have produced emitters with ΦPL exceeding 90%, EQEs above 30%, and full-width half maximums as low as 20 nm. We conclude by highlighting current limitations, including RISC bottlenecks, doping concentration effects, and synthetic challenges, while proposing design pathways toward next-generation multifunctional, solution-processable, and chiral MR-TADF materials. This review article provides a roadmap for advancing carbonyl-nitrogen based MR-TADF emitters toward high-performance OLED technologies.
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語言 en
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期刊性質 國外
收錄於 SCI Scopus
產學合作
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審稿制度 是
國別 DEU
公開徵稿
出版型式 ,電子版,紙本
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