In this work solution‐processed organic white‐light emitting diodes comprising a blend of red and blue phosphorescent dendrimers are presented. In contrast to common small molecule blended‐dye organic light emitting diodes (OLEDs), the bulky dendrons between the light emitting moieties increase the spacing and hamper the transfer of excitons between the dyes. The reduced transfer of the excitons from the blue dye to the red dye enables greater control over OLED color avoiding the issue in which small variations in the concentration of the red dye can dramatically change the emission color. Thus, the approach leads to enhanced manufacturing reproducibility. Transient electroluminescence measurements provide detailed insights into the charge carrier and exciton formation and transfer dynamics within the device.

中文翻译：

---

白色树枝状有机发光二极管：激子形成和转移

在这项工作中，介绍了一种由红色和蓝色磷光树枝状聚合物混合而成的经过溶液处理的有机白色发光二极管。与普通的小分子混合染料有机发光二极管（OLED）相比，发光部分之间的庞大树突增加了间距，并阻碍了激子在染料之间的转移。激子从蓝色染料到红色染料的转移减少使得能够更好地控制OLED颜色，避免了红色染料浓度的微小变化会显着改变发射颜色的问题。因此，该方法导致增强的制造再现性。瞬态电致发光测量可提供有关电荷载流子和激子形成以及器件内传输动力学的详细信息。