We demonstrate several polymer based electroluminescent devices with active poly(N-vinylcarbazole) (PVK) layer doped with diphenylpyrazoloquinoxaline (PQX) dyes, RPQX, with lateral substituent R = Me, MeO, F or Cl. The electronic properties of these fluorescence emitters and relevant electroluminescence devices are characterized by optical spectroscopy techniques. The first absorption bands of the RPQX dyes considerably overlap with the fluorescence emission band of the host PVK matrix resulting in efficient radiative energy transfer between them. Using the measured electroluminescent spectra the emission color is characterized in CIE 1931 XYZ color space. The electroluminescence devices with a dye-doped active layer PVK:RPQX (R = Me, MeO, F or Cl) emit light with different shades of green color. The electroluminescent performance is characterized in terms of current efficiency determined from the luminance-current-voltage measurements. Depending on the fluorescent dopant it ranges from about 0.5 to above 2.2 cd/A. Such efficiency has been achieved on a simple dye-doped device configuration without significant optimization. Accordingly, RPQX dyes may be considered as prospective fluorescence emitters for electroluminescent applications. The measured spectral characteristics of RPQX fluorescent emitters and relevant electroluminescent devices are compared with quantum-chemical DFT/TDDFT calculations based on re-parameterized long-range corrected functional and corrected linear response solvation. Relevant analysis, due to its good performance and predicability, appears to be helpful not only for understanding of the origin of electronic transitions, but may serve as useful tool for chemical engineering dealing with design and synthesis of novel organic dyes for optoelectronic applications.

我们展示了几种具有活性聚N的基于聚合物的电致发光器件（PVK）层掺杂有二苯基吡唑并喹喔啉（PQX）染料RPQX，侧向取代基R = Me，MeO，F或Cl。这些荧光发射器和相关的电致发光器件的电子性质通过光谱技术表征。RPQX染料的第一个吸收带与宿主PVK基质的荧光发射带显着重叠，从而导致它们之间的有效辐射能转移。使用测得的电致发光光谱，可在CIE 1931 XYZ颜色空间中对发射颜色进行表征。具有染料掺杂有源层PVK：RPQX（R = Me，MeO，F或Cl）的电致发光器件发出的光具有不同的绿色阴影。电致发光性能通过根据亮度-电流-电压测量确定的电流效率来表征。取决于荧光掺杂剂，其范围为约0.5至高于2.2cd / A。这种效率是在简单的染料掺杂设备配置中实现的，而没有明显的优化。因此，RPQX染料可以被认为是用于电致发光应用的预期荧光发射体。将RPQX荧光发射器和相关电致发光器件的光谱特性与基于重新参数化的远程校正功能和校正线性响应溶剂化的量子化学DFT / TDDFT计算进行了比较。相关分析，由于其良好的性能和可预测性，