机构地区: 华南理工大学材料科学与工程学院高分子光电材料与元器件研究所
出 处: 《物理学报》 2010年第6期4240-4244,共5页
摘 要: 制备了一种基于荧光聚合物共混的单发光层聚合物白光发光二极管.器件结构为铟锡氧化物/苯磺酸掺杂聚乙烯基二氧噻吩/发光层/1,3,5-三(N-苯基-2-苯并咪唑-2)苯41/Ba/Al,蓝光材料芴-氟化喹喔啉共聚物(PF-BPFQ5)、绿光材料苯基取代的聚对苯乙炔(P-PPV)和红光材料聚(2-甲氧基-5-(2′-乙基己氧基)-1,4-对苯乙炔)(MEH-PPV)共混为发光层.当PF-BPFQ5,P-PPV,MEH-PPV的质量比例为100∶0.6∶0.6时,获得标准的白光,色坐标为(0.331,0.329),器件最大发光效率为5.64cd/A,器件在不同的电流密度下表现出良好的光谱稳定性. White polymer light-emitting diode with a single layer of fluorescent polymer blend was fabricated. The structure of the device is indium tin oxide/poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) /emission layer/1,3,5-tris(N-phenylbenzimidazol-2-yl)-benzene/Ba/Al,and the emission layer is a blend of poly[2,7-(9,9-dioctyl)fluorene-co-2,3-bis(4-phenyl)-6-fluoroquinoxaline](PF-BPFQ5),phenyl-substituted poly(p-phenylene vinylene) derivative (P-PPV) and poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene]( MEH-PPV),which,respectively,emits blue, green and red light. When the blend weight ratio of PF-BPFQ5∶ P-PPV∶ MEH-PPV is 100∶ 0. 6∶ 0. 6,a pure white light emission is obtained with CIE coordinates of (0. 331,0. 329). The maximal luminance efficiencies is 5. 64 cd/A. Meanwhile,the electroluminescence spectrum of white-light emission is stable under different current densities.
领 域: [电子电信]