A Silole‐Based Efficient Electroluminescent Material with Good Electron‐Transporting Potential. Issue 8 (12th June 2015)

• Record Type: Journal Article
• Authors: Quan, Changyun; Nie, Han; Hu, Rongrong; Qin, Anjun; Zhao, Zujin; Tang, Ben Zhong
• Is Part Of: Chinese journal of chemistry. Volume 33:Issue 8(2015:Aug.)
• Page Start: 842
• Page End: 846
• Publication Date: 2015-06-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201500268
• Languages: English
• ISSNs: 1001-604X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new silole derivative, 2, 5‐bis(7‐(dimesitylboranyl)‐9, 9‐dimethylfluoren‐2‐yl)‐1‐methyl‐1, 3, 4‐triphenylsilole ((MesBF)₂MTPS), is synthesized and characterized. (MesBF)₂MTPS shows a good fluorescence efficiency of 15% in THF solution and a higher efficiency of 86% in solid film, presenting an aggregation‐enhanced emission characteristic. It is thermally and morphologically stable, with high decomposition and glass‐transition temperatures of 257 and 171°C, respectively. The LUMO energy level (−2.96 eV) of (MesBF)₂MTPS is lower than that of TPBi, revealing its electron‐transporting potential. Efficient organic light‐emitting diodes (OLEDs) are fabricated using (MesBF)₂MTPS as emitter, which radiates yellow light at 554 nm, and affords high maximum luminance, current efficiency, and external quantum efficiency of 48348 cd·m⁻², 12.3 cd·A⁻¹, and 4.1%, respectively.</p> </abstract>