Germafluorene conjugated copolymer——synthesis and applications in blue-light-emitting diodes and host materials

• 来源期刊: 中国科学B辑（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 212-218
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s11426-008-0143-z

摘要

A germafluorene-fluorene copolymer was successfully obtained via Suzuki polymerization. The ger-manium containing copolymer has an efficient blue light emission under the ultraviolet irradiation and its single layer EL device showed the highest brightness of 2630 cd/m2 at 7.8 V and the highest effi-ciency of 0.301 Im/W at 6.2 V. The copolymer can also serve as the host material for phosphorescent metal complexes with the maximum brightness of 15600 cd/m2 and the quantum efficiency of 8.5%. The results are quite promising and promise that as its analogs of fluorene and silafluorene, germafluorene is an excellent building block for blue light-emitting polymers and host materials.