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Morphological and electroluminescent effects of Au nanoparticles on light-emitting polymers

机译:金纳米粒子对发光聚合物的形貌和电致发光效应

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摘要

A series of light-emitting alternating copolymers, poly(9,9-dioctylfluorene-alt-thiophene) (PDOFT), end-capped with in situ reduced gold nanoparticles have been synthesized (PDOFT-Au). The H-1-NMR and C-13-NMR spectra corroborate the well-defined structures, and the XPS spectrum serves as direct evidence for the chemical bonding of gold nanoparticles with PDOFTs. All PDOFT-Au(s) are not only soluble in common organic solvents but also have good thermal stability up to 380-410 degrees C. The micrographs of TEM show that the size of gold nanoparticles grows up to 20 nm and the particles aggregate into blocks with an increasing quantity of HAuCl4. The colour coordinates of PDOFT-Au10 and PDOFT-Au15, (0.237, 0.655) and (0.272, 0.649), respectively, are getting close to the standard green (0.26, 0.65) demanded by the National Television System Committee (NTSC). In conjunction with their good luminescence properties and photometric efficiencies, PDOFT-Au10 and PDOFT-Au15 are good candidates for green light-emitting materials. PDOFT with a higher content of gold nanoparticles, such as PDOFT-Au30, affords a high current density, and thus is a potential candidate for solar cell or organic thin film transistor (OTFT) devices.
机译:合成了一系列的发光交替共聚物,聚(9,9-二辛基芴-alt-噻吩)(PDOFT),它们被原位还原的金纳米颗粒封端(PDOFT-Au)。 H-1-NMR和C-13-NMR光谱证实了定义明确的结构,XPS光谱直接证明了金纳米粒子与PDOFT的化学键合。所有PDOFT-Au不仅可溶于常见的有机溶剂,而且在高达380-410摄氏度的温度下也具有良好的热稳定性。TEM的显微照片显示,金纳米粒子的尺寸长至20 nm,并且粒子聚集成HAuCl4含量增加的生物封闭。 PDOFT-Au10和PDOFT-Au15的色坐标分别为(0.237,0.655)和(0.272,0.649),已接近国家电视系统委员会(NTSC)要求的标准绿色(0.26,0.65)。结合其良好的发光特性和光度效率,PDOFT-Au10和PDOFT-Au15是绿色发光材料的良好候选者。具有较高含量的金纳米颗粒的PDOFT(例如PDOFT-Au30)提供高电流密度,因此是太阳能电池或有机薄膜晶体管(OTFT)器件的潜在候选者。

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