摘要
在钯催化剂的作用下,通过4,7-二溴[2,1,3]苯并噻二唑与2,5-二乙炔基-3-辛基噻吩的偶联反应,合成了一种新的共轭高分子PTE-BT。采用紫外可见吸收光谱及荧光光谱对其光学性质进行了研究。紫外可见吸收谱结果表明,PTE-BT的固体膜光学带隙为1.86 eV;TiO2/PTE-BT共混固体膜的荧光发射谱结果表明,电子供体PTE-BT分子与电子受体TiO2分子间存在有效的电子转移。
A novel low band-gap conjugated polymer Poly [3-octyhhiophen-2, 5-diylethynylene-(benzo[ 1,2, 5 1 thiadiazole-4, 7-diyl) ethynylene] (PTE-BT) was prepared by palladium-catalyzed coupling reaction from 4,7-dibromo-2, 1,3-benmthiadiazole and 2,5-diethynyl-3-octylthiophene. Uvvis absorption spectrum of PTE-BT shows that the optical band gap of the PTE-BT film is 1.86 eV. The PL emission at 634 nm of PTE-BT film can be easily quenched by TiO2. The low band-gap and electron transition property of the polymer indicates that PTE-BT is a suitable candidate for the active materials in polymer solar cells.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第8期44-47,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(29974002)
关键词
聚苯并噻二唑3-基噻吩二炔
低带隙共轭聚合物
光学性质
合成
poly [3-octylthiophen-2,5-diylethynylene-( benzo [ 1,2,5 ] thiadiazole-4,7-diyl) ethynylene ]
low band-gap conjugated polymer
optical properties
synthesis