Red electroluminescent polyfluorenes containing highly efficient 2,1,3-benzoselenadiazole- and 2,1,3-naphthothiadiazole-based red dopants in the side chain
摘要:
通过将少量高效的D-A-D'型2,1,3-苯并硒二唑和2,1,3-萘并噻二唑衍生物附着在聚芴主体的侧链上,我们开发了两个系列的红色聚合物PFR-xBS和PFR- xNT。通过调节掺杂浓度,可以实现从 PF 主体到红色掺杂剂的完全能量转移。这些红色聚合物的 EL 光谱主要显示红色发射,这归因于掺杂剂。红色聚合物的单层器件(ITO/PEDOT:PSS/聚合物/Ca/Al)实现了纯红光,峰值在620 nm,发光效率为2.91 cd A−1,CIE坐标为(0.62,0.36) PFR-10BS 和峰值为 632 nm 的饱和红光,PFR-10NT 的发光效率分别为 3.04 cd A−1,CIE 坐标为(0.63,0.35)。据我们所知,PFR-10NT 的器件性能是基于荧光聚合物的最佳单层饱和红色 PLED 之一。
Red electroluminescent polyfluorenes containing highly efficient 2,1,3-benzoselenadiazole- and 2,1,3-naphthothiadiazole-based red dopants in the side chain
作者:Lei Chen、Hui Tong、Zhiyuan Xie、Lixiang Wang、Xiabin Jing、Fosong Wang
DOI:10.1039/c1jm12549d
日期:——
By attaching small amounts of highly efficient D-A-D′-type 2,1,3-benzoselenadiazole and 2,1,3-naphthothiadiazole derivatives to the side chain of a polyfluorene host, we developed two series of red polymers, PFR-xBS and PFR-xNT. By tuning the doping concentration, complete energy transfer from the PF host to the red dopant occurs. The EL spectra of these red polymers show predominantly a red emission, attributed to the dopants. Single-layer devices (ITO/PEDOT:PSS/polymer/Ca/Al) of red polymers realized pure red light with a peak at 620 nm, a luminous efficiency of 2.91 cd A−1 and CIE coordinates of (0.62, 0.36) for PFR-10BS, and a saturated red light with a peak at 632 nm, a luminous efficiency of 3.04 cd A−1 and CIE coordinates of (0.63, 0.35) for PFR-10NT, respectively. To the best of our knowledge, the device performance of PFR-10NT is among the best single-layer saturated red PLEDs based on fluorescent polymers.
通过将少量高效的D-A-D'型2,1,3-苯并硒二唑和2,1,3-萘并噻二唑衍生物附着在聚芴主体的侧链上,我们开发了两个系列的红色聚合物PFR-xBS和PFR- xNT。通过调节掺杂浓度,可以实现从 PF 主体到红色掺杂剂的完全能量转移。这些红色聚合物的 EL 光谱主要显示红色发射,这归因于掺杂剂。红色聚合物的单层器件(ITO/PEDOT:PSS/聚合物/Ca/Al)实现了纯红光,峰值在620 nm,发光效率为2.91 cd A−1,CIE坐标为(0.62,0.36) PFR-10BS 和峰值为 632 nm 的饱和红光,PFR-10NT 的发光效率分别为 3.04 cd A−1,CIE 坐标为(0.63,0.35)。据我们所知,PFR-10NT 的器件性能是基于荧光聚合物的最佳单层饱和红色 PLED 之一。