在这项研究中,开发了全芳香族聚醚砜,轴承蓝色,黄色,和橙红色π共轭半导体单元。卡巴唑-,蒽醌-,和苯并噻二唑基荧光团与二苯基砜部分共聚。另外使用了二苯基吡啶共聚单体,充当增溶单元和弱蓝色荧光基团。利用这个原理,高分子量的荧光聚芳醚,高达70kDa,被开发,显示成膜能力和高热稳定性,在普通有机物中保持优异的溶解性,非易失,和非氯化溶剂。通过共聚单体类型和比例的细微变化来实现发射颜色的微调。在可见光谱的蓝色或黄色区域发射的单发色团共聚物,而带有双发色团的三元共聚物在整个可见光谱中发射,导致白光发射。在环境条件下20wt%的极性非质子溶剂溶液允许荧光共聚醚的沉积和从非氯化溶剂印刷。评估所有聚醚的结构和光电性能,和选定的共聚物被成功地用于有机发光二极管(OLED)器件的发光层(EML),使用刚性或柔性基板。对于高达15V的偏置电压,在所有情况下都显示出显著的颜色稳定性。制造设备的国际委员会(CIE)位于蓝色(0.16,0.16),黄色(0.44,0.50),或可见光谱的白色区域(0.33,0.38),根据共聚单体的比例变化最小。本文开发的用于聚合物发光二极管(PLED)的半导体聚醚砜的通用方法导致了高达25g高分子量单批的发光聚合物的大规模生产,证明了这种方法的有效性,作为一种简单的工具,以促进大面积PLED覆盖的灵活和可印刷的EML的合成。
In this study, fully aromatic polyether sulfones were developed, bearing blue, yellow, and orange-red π-conjugated semiconducting units. Carbazole-, anthracene-, and benzothiadiazole-based fluorophores are copolymerized with a diphenylsulfone moiety. A diphenylpyridine comonomer was additionally utilized, acting as both a solubilizing unit and a weak blue fluorescent group. Using this rationale, fluorescent polyarylethers with high molecular weights, up to 70 kDa, were developed, showing film formation ability and high thermal stability, while preserving excellent solubility in common organic, nonvolatile, and nonchlorinated solvents. Fine-tuning of the emission color was achieved through subtle changes of the comonomers\' type and ratio. Single-chromophore-bearing copolymers emitted in the blue or the yellow region of the visible spectrum, while the dual-chromophore-bearing terpolymers emitted throughout the visible spectrum, resulting in white light emission. Solutions of 20 wt% in polar aprotic solvents at ambient conditions allowed the deposition of fluorescent copolyethers and printing from non-chlorinated solvents. All polyethers were evaluated for their structural and optoelectronic properties, and selected copolymers were successfully used in the emitting layer (EML) of organic light-emitting diode (OLED) devices, using either rigid or flexible substrates. Remarkable color stability was displayed in all cases for up to 15 V of bias voltage. The Commission Internationale de L\'Eclairage (CIE) of the fabricated devices is located in the blue (0.16, 0.16), yellow (0.44, 0.50), or white region of the visible spectrum (0.33, 0.38) with minimal changes according to the ratio of the comonomers. The versatile methodology toward semiconducting polyethersulfones for polymer light-emitting diodes (PLEDs) developed herein led to the scaled-up production of luminescent polymers of up to 25 g of high-molecular-weight single batches, demonstrating the effectiveness of this approach as a straightforward tool to facilitate the synthesis of flexible and printable EMLs for large-area PLED coverage.