Luminescent properties of a novel fluorene organic material

✍ Scribed by Shuangling Lou; Junsheng Yu; Jincheng Qian; Yadong Jiang; Qing Zhang; Hongjie Xu; Limei Sun

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 229 KB
• Volume: 23
• Category: Article
• ISSN: 1522-7235
• DOI: 10.1002/bio.1073

✦ Synopsis

Abstract

The photo‐physical properties of 6,6′‐(9__H__‐fluoren‐9,9‐diyl)bis(2,3‐bis(9,9‐dihexyl‐9H‐fluoren‐2‐yl)quinoxaline) (BFLBBFLYQ) and its blend doped with N′‐biphenyl‐N,N′‐bis‐(3‐methylphenyl)‐1,1′‐biphenyl‐4,4′‐diamine (TPD) were investigated. The absorption, photoluminescence (PL) and electroluminescence (EL) properties of pristine BFLBBFLYQ and blend in solution and spin‐coated film are outlined, including a discussion of charge‐transfer (CT) exciplex emission of BFLBBFLYQ:TPD blend in the solid state. The luminescent properties of BFLBBFLYQ films using different deposition processes were studied. It was found that the low‐energy emission bands at 530–570 nm appeared in the PL spectra of BFLBBFLYQ evaporated films in ultra‐high vacuum. Also, the low‐energy band was the exclusive emission in the EL spectra of BFLBBFLYQ films. Copyright © 2008 John Wiley & Sons, Ltd.