A New Approach to Prepare Efficient Blue AIE Emitters for Undoped OLEDs1. Issue 18 (24th March 2014)

• Record Type: Journal Article
• Authors: Huang, Jing; Tang, Runli; Zhang, Tian; Li, Qianqian; Yu, Gui; Xie, Shuyi; Liu, Yunqi; Ye, Shanghui; Qin, Jingui; Li, Zhen
• Is Part Of: Chemistry. Volume 20:Issue 18(2014)
• Page Start: 5317
• Page End: 5326
• Publication Date: 2014-03-24
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201303522
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Two aggregation‐induced emission active luminogens (TPE–<italic>p</italic>TPA and TPE–<italic>m</italic>TPA) were successfully synthesized. For comparison, another six similar compounds were prepared. Because of the introduced hole‐dominated triphenylamine (TPA), fluorene groups with high luminous efficiency, and unconjugated linkages, the π conjugation length of the obtained luminogens is effectively restricted to ensure their blue emission. The undoped organic light‐emitting diodes based on TPE–<italic>p</italic>TPA and TPE–<italic>m</italic>TPA exhibited blue or deep‐blue emissions, low turn‐on voltages (3 V), and high electroluminescence efficiencies with <italic>L</italic>_max, <italic>η</italic>_{C, max}, and <italic>η</italic>_{P, max} values of up to 26 697 cd m⁻², 3.37 cd A⁻¹, and 2.40 Lm W⁻¹.</p> </abstract>