title: A Significantly Twisted Spirocyclic Phosphine Oxide as a Universal Host for High-Efficiency Full-Color Thermally Activated Delayed Fluorescence Diodes.
abstract: A universal thermally activated delayed fluorescence (TADF) host, 4'-diphenylphosphinoylspiro[fluorene-9,9'-xanthene] (SFXSPO), is constructed with a highly distorted and asymmetric configuration and disordered molecular packing in its solid state. SFXSPO successfully endows its full-color TADF diodes with state-of-the-art performance, e.g., the record external quantum efficiency of 22.5% and 19.1% and internal quantum efficiency of ≈100% for its yellow TADF diodes and single-host full-TADF nearly-white-emitting devices, respectively.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education and School of Chemistry and Material Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education and School of Chemistry and Material Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, China.
authors.forename: Dongxue
authors.initials: D
authors.lastname: Ding
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Youtian
authors.initials: Y
authors.lastname: Tao
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education and School of Chemistry and Material Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, China.|Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wei
authors.affiliation: Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
authors.forename: Runfeng
authors.initials: R
authors.lastname: Chen
authors.affiliation: Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
authors.forename: Linghai
authors.initials: L
authors.lastname: Xie
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China.|Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education and School of Chemistry and Material Science, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, China.|Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
keywords: full color; spiro compounds; thermally activated delayed fluorescence diodes; twisted configuration; universal host