《High Triplet Energy Level Achieved by Tuning the Arrangement of Building Blocks in Phosphorescent Polymer Backbones for Furnishing High Electroluminescent Performances in Both Blue and White Organic Light-Emitting Devices》 was written by Liu, Boao; Dang, Feifan; Tian, Zhuanzhuan; Feng, Zhao; Jin, Deyuan; Dang, Wanping; Yang, Xiaolong; Zhou, Guijiang; Wu, Zhaoxin. Formula: C7H6BrNO2This research focused ontriplet energy phosphorescent polymer blue white organic LED; diode blue white emitting organic phosphorescent polymer triplet energy; electroluminescent device organic blue white phosphorescent polymer triplet energy; OLEDs; charge-carrier injection/transporting; functionalization; high triplet energy level; phosphorescent polymers; polymer backbone. The article conveys some information:
A high triplet energy level (ET) of ∼2.83 eV was achieved in a novel polymer backbone through tuning the arrangement of 2 kinds of building blocks, showing enhanced hole injection/transporting capacity. Based on this new polymer backbone with high ET, both blue and white phosphorescent polymers were developed with a trade-off between high ET and enhanced charge-carrier transporting ability. Their photophys. features, electrochem. behaviors, and electroluminescent (EL) properties were characterized. Benefitting from the advantages associated with the novel polymer backbone, the blue phosphorescent polymers show top-ranking EL performances with a maximum luminance efficiency (ηL) of 15.22 cd A-1, corresponding to a power efficiency (ηP) of 12.64 lm W-1, and external quantum efficiency (ηext) of 6.22% and the stable Commission Internationale de L’Eclairage (CIE) coordinates of (0.19, 0.38). Also, blue-orange (B-O) complementary-colored white phosphorescent polymers based on this novel polymer backbone were also obtained showing encouraging EL efficiencies of 12.34 cd A-1, 9.59 lm W-1, and 4.10% in the optimized WOLED together with exceptionally stable CIE coordinates of (Δx = 0.014, Δy = 0.010) in a wide driving voltage range from 4 to 16 V. All of these attractive EL results achieved by these novel phosphorescent polymers show the great potential of this new polymer backbone in developing highly efficient phosphorescent polymers. The experimental process involved the reaction of Methyl 5-bromopicolinate(cas: 29682-15-3Formula: C7H6BrNO2)
Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Formula: C7H6BrNO2