研究领域和现状 | 研究兴趣集中在有机电致发光显示(OLED)、高分子电致发光显示(PLED)、高分子化学荧光传感器和高分子太阳能电池。 | 1.有机电致发光材料 | (1)重点发展单核和多核有机金属荧光和磷光配合物。目前已开发出比经典单核8-羟基喹啉铝具有更高电致荧光效率和电子迁移率的双核8-羟基喹啉铝配合物;发现含混合配体的单核 Cu (I)配合物具有高达59%的固态荧光量子效率,且没有明显的浓度淬灭效应,在此基础上,制备了在105 cd/m2亮度下电流效率达 10.5 cd/A 的绿光OLEDs器件。 | (2)为了提高OLEDs器件性能,开展了具有优异热稳定性的空穴注入和传输材料的研究。以咔唑和二苯胺为基本构造单元,设计和合成了系列具有优异形态稳定性的新型空穴传输材料。相应器件效率和经典空穴传输材料NPB相当。这些材料优异的形态稳定性有利于长寿命OLEDs制备。 | | 2.高分子电致发光材料 | (1)开发出可用于制备单层PLEDs器件的双极发光高分子,包括PPV、PAF类共聚物,含三芳胺、苯基取代咔唑和恶二唑/三唑(oxadiazole/triazole)单元的聚喹啉,两次得到美国核心期刊评述。 (2)基于能量转移和电荷转移的物理思想,发展出系列分子分散型高分子发光材料,其电致发光性能具有国际可比性。例如:蓝光高分子的色坐标为(CIE) (0.14, 0.20),电流效率为3.0 cd/A;绿光高分子的色坐标为(CIE)(0.31, 0.58),电流效率为8.0 cd/A;红光高分子的色坐标为(CIE)(0.14, 0.20),电流效率为1.5 cd/A。 提出了单一高分子产生白光的新途径。通过在蓝光高分子中化学键合高效荧光染料,设计和合成了稳定、高效和色纯度好的白光高分子。白色PLEDs的电流效率达4.0 cd/A,色坐标为CIE (0.32, 0.36), 而且色坐标基本不随驱动电压而改变。 | <IMG style='BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px' src='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638402515.gif' _fcksavedurl='/wcm/WCMV6/system/read_image.jsp?FileName=U020101123372408361377.gif' OLDsrc='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638402515.gif' <IMG style='BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px' src='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638400083.gif' _fcksavedurl='/wcm/WCMV6/system/read_image.jsp?FileName=U020101123372553167015.gif' OLDsrc='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638400083.gif' 红绿蓝三基色高分子发光材料(左)和相应 EL光谱(右) |
<IMG style='BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px' src='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638412155.gif' _fcksavedurl='/wcm/WCMV6/system/read_image.jsp?FileName=U020101123372764102758.gif' OLDsrc='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638412155.gif'<IMG style='BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px' src='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638416377.gif' _fcksavedurl='/wcm/WCMV6/system/read_image.jsp?FileName=U020101123372828319211.gif' OLDsrc='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638416377.gif'<IMG style='BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px' src='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638410304.gif' _fcksavedurl='/wcm/WCMV6/system/read_image.jsp?FileName=U020101123372901900232.gif' OLDsrc='/_upload/article/images/14/8c/a9f0f9154666819301cda54ed586/W020101123373638410304.gif' 白色电致荧光产生原理(左),不同驱动电压下的EL光谱(中)和白光聚合物结构(右) 3.有机/高分子化学传感器 |
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(1)高选择性阴离子化学传感器:带苯酚基的恶二唑衍生物可用作高选择性荧光和比色化学传感器,它们对 H2PO4-和 F-有很高的选择性。具有特定结构的这种分子甚至可区分H2PO4-和 F-。 | (2)金属离子化学传感器:发现两种具有荧光放大作用的聚喹啉,在测试的所有金属离子中,它们表现出对Ag+的高选择性。 | (3)生物分子聚合物化学传感器:成功地合成了带羟基的聚喹啉,它不仅是F-的高选择性荧光化学传感器,而且F-的加入具有荧光增强作用。 | | 研究成果 | 近五年来,在Advanced Materials, Chemistry of Materials, Macromolecules,J. of Mater. Chem., Applied Physics Letters等学术期刊上发表学术论文80余篇,其中70余篇发表在国际学术刊物上。申请中国发明专利8项,美国专利2项。 先后主办国际学术会议2次,在国内外学术会议上做邀请报告20余次。 | | 代表性论文 | 1. Novel thermally stable blue-light-emitting polymer containing N,N,N,N-tetraphenyl-phenylenediamine units and its intramolecular energy transfer, Chem. Mater., 2002, 14, 4484. | 2. Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes, Appl. Phys. Lett., 2002, 81, 4. | 3. Highly selective fluorescent chemosensor for silver(I) ion based on amplified fluorescence quenching of conjugated polyquinoline, Macromolecules, 2002,35, 7169. | 4.Turn-On”Conjugated Polymer Fluorescent Chemosensor for Fluoride Iron, Macromolecules, 2003, 36,2584. | 5. Oxadiazole-Functionalized Europium(III) β-Diketonate Complex for Efficient Red Electroluminescence, Chem. Mater.,2003, 15,1935. | 6. A dinuclear aluminum 8-hydroxyquinoline complex with high electron mobility for organic light-emitting diodes,Applied Physics Letters, 2003, 82,1296. | 7. Highly Efficient Green Phosphorescent Organic Light-Emitting Diodes Based on Cu(I) Complex, Adv. Mater., 2004, 16, 432. | 8.Novel Core-shell Structure Hole-Transporting Molecules Based on Carbazole as Building Blocks for Organic Light-Emitting Devices,J. Mater. Chem., 2004, 14, 895. | 9.A Modified WittigPolycondensation to High-trans and High Molecular Weight PPVs, Tetrahedron Letters, 2004, 45, 3823. | 10.White Electroluminescence from Polyfluorene chemically doped with 1,8-Naphthalimide Moieties, Appl. Phys. Lett., 2004, 85, 2172 |
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