https://scholars.lib.ntu.edu.tw/handle/123456789/580997
標題: | meta-Substituted benzophenones as multifunctional electroactive materials for OLEDs | 作者: | Keruckiene R Keruckas J Cekaviciute M Volyniuk D Lee P.-H Chiu T.-L Lee J.-H Grazulevicius J.V. JIUN-HAW LEE |
關鍵字: | Fluorescence; Iridium compounds; Organic light emitting diodes (OLED); Phosphorescence; Polypropylenes; Acridan; Aggregation-induced emissions; Benzophenone; External quantum efficiency; Red phosphorescent devices; Singlet-triplet energy gap; TADF; Thermally activated delayed fluorescences; Quantum efficiency; Agglomeration; Benzophenone; Efficiency; Employment; Fluorescence; Lead; Materials; Phosphorescence | 公開日期: | 2020 | 卷: | 174 | 來源出版物: | Dyes and Pigments | 摘要: | meta-Substituted benzophenones bearing tetrahydrocarbazole, phenoxazine and 2,7-ditert-butyl-9,9-dimethylacridine moieties were synthesized as materials exhibiting both thermally activated delayed fluorescence and aggregation induced emission enhancement. The derivatives showed improved HOMO and LUMO separation compared to that of the corresponding derivatives with para-linkage which lead to the minimized singlet-triplet energy gap of ca. 0.04 eV. By employing the acridan-substituted benzophenone derivative as non-doped emissive layer in OLED, a green device with external quantum efficiency of 1.93% was obtained with the CIE coordinates of (0.37, 0.57). More efficient triplet population employment was achieved after doping the acridan-substituted benzophenone derivative with red phosphorescent emitter bis(1-phenyl-isoquinoline)(acetylacetonate)Iridium(III). Red phosphorescent device exhibited small efficiency roll-off and a relatively high external quantum efficiency of 8.6%. External quantum efficiency of 7.60% was achieved for green device based on host:guest system using emitter 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-10H-phenoxazine which exhibited thermally activated delayed fluorescence. ? 2019 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076783956&doi=10.1016%2fj.dyepig.2019.108058&partnerID=40&md5=991e6bd22bb6f17c1a9b6e912f1e536a https://scholars.lib.ntu.edu.tw/handle/123456789/580997 |
ISSN: | 01437208 | DOI: | 10.1016/j.dyepig.2019.108058 |
顯示於: | 電機工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。