新型聚集荧光增强芴衍生物的光谱特性及电致发光性能研究

对新型聚集荧光增强芴衍生物的溶液状态下的光致发光和紫外-可见吸收光谱进行了表征，同时对比了其在丙酮/水混合溶液中的光致发光特性。结果表明，当水的体积比不断提高时，芴衍生物的丙酮/水混合溶液的光致发光光谱辐照度增强，这是由于该芴衍生物不溶于水，使得材料形成聚集态，导致聚集荧光增强;同时，PL光谱发生蓝移，这是因为溶液加水后形成芴衍生物的蓝色晶态聚集，这种晶态聚集会导致光致发光光谱的蓝移，并且晶态聚集越有序，发射的波长越短。另外，新型芴衍生物分子是通过在芴基团上链接四苯基苯和三苯胺官能团，具有抑制浓度猝灭及增强电荷传输能力，因此作为发光层，制得了非掺杂的有机电致发光器件。

Spectra Characteristics and Electroluminescence Performance of Novel Fluorene Derivatives with Aggregation Fluorescence Enhancement

The photoluminescence (PL) spectra and UV-Visible absorption spectra of three novel fluorene derivatives solution containing different triphenylamine (TPA) and tetraphenyl-benzene (TPB) groups were systematically investigated. The PL spectra of the acetone/water solution were tested to analyze the capability of suppression concentration quenching (SCQ). The results showed that when water fraction ranged from 50% to 90%, the spectral irradiance of the mixture was obviously increased. Meanwhile, the PL spectra had blue shift due to the blue crystalline aggregation of novel fluorene derivatives, and the blue shift is proportional to the order of crystalline aggregation. Moreover, since the tetraphenyl-benzene and triphenylamine functional groups were tailored to fluorene backbone to suppress the concentration quenching of the fluorene dye and improve the charge carrier transporting ability, the non-doped organic light-emitting devices (OLEDs) were achieved.