Orthogonal Molecular Structure for Better Host Material in Blue Phosphorescence and Larger OLED White Lighting Panel
2014; Wiley; Volume: 25; Issue: 4 Linguagem: Inglês
10.1002/adfm.201403402
ISSN1616-3028
AutoresLei Ding, Shou‐Cheng Dong, Zuo‐Quan Jiang, Hua Chen, Liang‐Sheng Liao,
Tópico(s)Luminescence and Fluorescent Materials
ResumoHigh‐efficiency blue phosphorescence devices with external quantum efficiencies above 25% are developed using a new bipolar host material, diphenyl(10‐phenyl‐10 H ‐spiro[acridine‐9,9′‐fluoren]‐2′‐yl)phosphine oxide (POSTF), which is constructed in orthogonal molecular structure with a spiro‐coree. The separation of bipolarity from effective spiro‐fluorene‐triphenylamine (STF) structure is elucidated and its versatility in device is evaluated by two kinds of sky‐blue phosphors. Noticeably, large‐size white light‐emitting panel (150 mm × 150 mm) is fabricated with max power efficiency of 75.9 l m W −1 using this new host.
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