PL and EL properties of a new kind of copolymer DBPPV–co–MEHPPV

✍ Scribed by Deng-Hui Xu; Zhen-Bo Deng; Ying Xu; Jing Xiao; Chun-jun Liang; Hong-Yu Zhao; Zheng-ping Liu

• Book ID: 103843321
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 351 KB
• Volume: 122
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2005.03.015

✦ Synopsis

The copolymers, DBPPV-co-MEHPPV (4:1, 1:1, 1:4), have been synthesized by the modified Gilch polymerization. For comparison, the homopolymers poly[2-methoxy-5-(2 -ethyl-hexyloxy)-1,4-phenylene] (MEHPPV) and poly(2,5-dibutoxy-p-phenylene vinylene) (DBPPV) were synthesized either. The 1 H NMR measurements showed a lower concentration of structural defects for DBPPV-co-MEHPPV copolymers. The synthesized polymers showed UV-vis absorbance in the range 460-500 nm. Photoluminescence (PL) and electroluminescence (EL) properties of the copolymers have been studied. The organic light emitting devices with the structure of ITO/polymer/AlQ/LiF/Al have been fabricated based on these polymers, and they showed better EL properties. The highest EL brightness of the DBPPV-co-MEHPPV (1:4) and DBPPV-co-MEHPPV (1:1) devices reached 1130 and 486 cd/m 2 , respectively.