A Versatile Triphenylamine/Fluoranthene‐Based Derivative as a Nondoped Green‐Emitting, Hole‐Transporting Interlayer for Electroluminescent Devices. Issue 6 (21st March 2013)

• Record Type: Journal Article
• Authors: Yuan, Yi; Zhang, Guo‐Qiang; Lu, Feng; Tong, Qing‐Xiao; Yang, Qing‐Dan; Mo, Hin‐Wai; Ng, Tsz‐Wai; Lo, Ming‐Fai; Guo, Zheng‐Qing; Wu, Chuan; Lee, Chun‐Sing
• Is Part Of: Chemistry, an Asian journal. Volume 8:Issue 6(2013:Jun.)
• Page Start: 1253
• Page End: 1258
• Publication Date: 2013-03-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201300002
• Languages: English
• ISSNs: 1861-4728

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new triphenylamine‐bridged fluoranthene derivative, 4‐(7, 10‐diphenylfluoranthen‐8‐yl)‐<italic>N</italic>‐[4‐(7, 10‐diphenylfluoranthen‐8‐yl)phenyl]‐<italic>N</italic>‐phenylaniline (BDPFPA), with a high glass transition temperature of 220 °C has been synthesized and characterized. BDPFPA is a highly fluorescent and versatile material that can be used as a nondoped green emitter and as a hole transporter. BDPFPA was used in a standard trilayer device as the emitting layer, which showed a low turn‐on voltage (&lt;3 V) and a high efficiency of 11.6 cd A⁻¹. The device also shows little efficiency roll‐off at high brightness. For example, the efficiency can still be maintained at 11.4 cd A⁻¹ (5.4 lm W⁻¹) at a brightness of 10 000 cd m⁻². These results are among the best reported for nondoped fluorescent green organic light‐emitting diodes. A simple bilayer device, in which BDPFPA serves as a hole‐transporting layer, has a maximum power efficiency of 3.3 lm W⁻¹ and the performance is nearly 40 % higher than that of an <italic>N</italic>, <italic>N</italic>′‐bis(1‐naphthyl)‐<italic>N</italic>, <italic>N</italic>′‐ diphenyl‐1, 1′‐biphenyl‐4, 4′‐diamine (NPB)‐based standard device.</p> </abstract>