含噻二唑聚芴类白光聚合物的合成与发光性能研究

通过Suzuki偶联反应将2，7-二溴-9，9-二辛基芴（Br-DOF）、2，7-二硼酸-9，9-二辛基芴（B-DOF）和4-（8-（2，7-二溴-9-辛基芴）辛氧基）-N-4-（7-（4-（二苯胺基）苯基）苯并噻二唑）苯基-二苯胺（Br-TAF）共聚，合成了白光聚合物PDOF-TAF。以PDOF-TAF为发光层，溶液旋涂制备了非掺杂型单层白光有机电致发光二极管，色坐标为（0.23，0.18）。通过插入电子传输层TPBI和空穴传输层PVK得到的白光器件发射光谱覆盖了410~700 nm区域，色坐标从（0.23，0.18）调整到（0.24，0.32），亮度达到2 020 cd/m²，电流效率达到1.4 cd/A。实验结果表明，PDOF-TAF是一种很好的白光聚合物发光材料，在WOLED中将有很好的应用前景。

Synthesis and Luminescent Properties of Polyfluorene Containing Thiadiazole as White Light-emitting Polymer

Polyfluorene containing thiadiazole (PDOF-TAF) was synthesized by palladium-catalyzed Suzuki cross coupling reaction of 2,7-dibromo-9,9-dioctyl-9H-fluorene (Br-DOF), 9,9-dioctyl-9H-fluorene-2,7-diyldiboronic acid (B-DOF) and 4-(8-(2,7-dibromo-9-octyl-9H-fluoren-9-yl)octyloxy)-N-(4-(7-(4-(diphenylamino) phenyl)benzoc]1, 2, 5] thiadiazol-4-yl)phenyl)-N-phenylaniline (Br-TAF). The synthesized polymer was applied as white light-emitting polymer and was used as the emitting layer to prepare the non-doped white organic light-emitting diodes (WOLED) by spin-coating. The color coordinates locate at (0.23, 0.18). By inserting 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBI) as electron transport layer and Poly(N-vinylcarbazole) (PVK) as hole transport layer, the emission spectra of the diode cover 410~700 nm visible region, and the color coordinates shift to (0.24, 0.32), locating close to the white point. In addition, the luminescence and current efficiency can reach up to 2 020 cd/m² and 1.4 cd/A, respectively, indicating that the synthesized polymer has highly potential application as the material of white light-emitting layer in WOLED.