https://scholars.lib.ntu.edu.tw/handle/123456789/543329
標題: | Control of π-π Stacking in carbazole-benzimidazo〈1,2-: F 〉phenanthridines: The design of electron-transporting bipolar hosts for phosphorescent organic light-emitting diodes | 作者: | Chen, Y.-H. Chen, C.-H. Chang, C.-M. Fan, B.-A. Chen, D.-G. JIUN-HAW LEE Chiu, T.-L. PI-TAI CHOU MAN-KIT LEUNG |
公開日期: | 2020 | 卷: | 8 | 期: | 10 | 起(迄)頁: | 3571 - 3579 | 來源出版物: | Journal of Materials Chemistry C | 摘要: | Two bipolar hosts, 8-cbzBIFP and 10-cbzBIFP, both with basic skeletons of orthogonally-connected carbazole and benzimidazo〈1,2-f〉phenanthridine (BIFP) have been prepared. The planar structure of the BIFP moiety governs the molecular stacking in the crystal lattice. Electron transport properties, in comparison to the benzimidazole derivatives, are facilitated. Both hosts display fabulous performances in phosphorescent organic light-emitting diodes with bis(2-phenylpyridine)(acetylacetonate)iridium(iii) as an emitter. The optimized green PhOLED of 10-cbzBIFP achieves the maximum brightness (Lmax) of 58 810 cd m-2, the maximum current efficiency (ηc) of 87.0 cd A-1 and external quantum efficiency (EQE) of 21.1%. Likewise, 8-cbzBIFP shows an Lmax of 58 870 cd m-2, ηc of 77.3 cd A-1 and EQE of 19.1%. This journal is © The Royal Society of Chemistry. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85081718944&partnerID=40&md5=97937c3d4e35fe9019c3e1f7aa35bce1 https://scholars.lib.ntu.edu.tw/handle/123456789/543329 |
ISSN: | 20507534 | DOI: | 10.1039/c9tc06550d |
顯示於: | 化學系 |
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