【作者】 王志强；

【导师】 张晓宏；

【作者基本信息】 中国科学院研究生院（理化技术研究所） ， 有机化学， 2007， 博士

【摘要】 本文设计并合成了一系列蒽衍生物小分子蓝光材料,其中五种化合物在有机溶剂中具有较大溶解度,可以满足用溶液法制备器件对材料溶解性的要求。我们详细研究了各种化合物的光物理、热物理和电化学性质以及部分化合物的电致发光器件性能。具体内容如下:(1)合成了一种易溶性蒽衍生物小分子蓝光材料TBPPA,该化合物具有高的荧光量子效率和热稳定性(Tg=207℃)。用该化合物作为蓝光发光和蓝光主体材料,通过旋涂法成功制备了有机小分子单层和双层电致发光器件,双层器件最大发光亮度和效率分别达到了1690cd/m2和0.54 cd/A。(2)合成了一系列蒽衍生物小分子蓝光材料TBMFA、TBPFA和TBBFA,其中后两个化合物在有机溶剂中溶解度较大,重点对比研究了这两个化合物的性质。理论计算显示,这两个化合物都存在trans和cis两种稳定构象。分子中烷基链的长短对化合物的光物理性质和电化学性质影响很小,但对化合物的热稳定性影响较大。用TBPFA作为蓝光发光和蓝光主体材料,通过旋涂法成功制备了有机小分子单层电致发光器件。(3)合成了一系列的蒽衍生物小分子蓝光材料TBMFPA、TBPFPA和TBBFPA,其中后两个化合物在有机溶剂中溶解度较大,重点对比研究了这两个化合物的性质。对TBPFPA的单晶结构分析表明,这类材料在固态时分子间作用力较弱。TBPFPA和TBBFPA都具有较高的荧光量子效率,较高的热稳定性和电化学可逆性。TBPFPA可以通过旋涂法制备出高质量无定形薄膜,将其作为蓝光发光和蓝光主体材料用旋涂法和旋涂与蒸镀相结合的方法制备的器件取得了较好的结果,最大发光亮度和效率分别达到了4220 cd/m2和1.05cd/A。(4)合成了一种蒽衍生物蓝光材料TBDNPA,对比TBMFA和TBMFPA研究了它们的性质。它们都具有较高的荧光量子效率,较高的热稳定性和电化学可逆性。三个化合物的HOMO和LUMO轨道能级都很接近,而且带隙较大,有希望作为蓝光发光和蓝光主体材料应用于电致发光器件。更多还原

【Abstract】 We designed and synthesized a series of blue-light emitting anthracene derivatives, in which five compounds have enough high solubility for fabricating OLEDs by solution process. The photophysical properties, thermal properties, electrochemical properties of all compounds and electroluminescence properties of some compounds were investigated detailedly.The main contents of the thesis are summarized as follows:(1) A new soluble small molecular anthracene derivative TBPPA was synthesized, which has high fluorescence quantum efficiency, high thermal stability and reversible oxidation potential. By spin-coating process, we fabricated OLEDs successfully using TBPPA as blue-light emitting or blue host material. The devices maximum brightness and efficiency are 1690cd/m2 and 0.54 cd/A respectively.(2) A series of small molecular anthracene derivatives TBMFA, TBPFA and TBBFA were synthesized, in which TBPFA and TBBFA were investigated in parallel because of their high solubilities in organic solvents. Theoretical calculations on the three-dimensional structures of TBPFA and TBBFA showed that the two compounds both have stable trans and cis two conformations. The alkyl groups have little effect on photophysical properties and oxidation potentials, but have biggish effect to thermal properties. By spin-coating process, we fabricated blue-light emitting OLEDs successfully using TBPFA as emission layer. (3) A series of small molecular anthracene derivatives TBMFPA, TBPFPA and TBBFPA were synthesized, in which TBPFPA and TBBFPA were investigated in parallel for their high solubilities in organic solvents. The single crystal X-ray diffraction of TBPFPA shows the intermolecular interactions are very weak. TBPFPA and TBBFPA both have high fluorescence quantum efficiencies, high thermal stabilities and reversible oxidation potentials. TBPFPA can form high quality amorphous film by spin-coating process. Using TBPFPA as blue-light emitting or blue host materials, the blue-light emitting devices were fabricated by spin-coating process in combination with vacuum deposition process. The devices maximum brightness and efficiency are 4220cd/m2 and 1.05cd/A respectively.(4) A new small molecular anthracene derivative TBDNPA was synthesized and the properties of TBDNPA, TBMFA and TBMFPA were studied in detail. The three compounds all have high fluorescence quantum efficiencies and thermal stabilities. They have approximate HOMO and LUMO energy levels, which can be used as blue-light emitting and blue host materials in OLEDs for their large bandgaps.更多还原