764710-78-3Relevant academic research and scientific papers
Simultaneously enhancement of quantum efficiency and color purity by molecular design in star-shaped solution-processed blue emitters
He, Xuehan,Chen, Lei,Zhao, Yongbiao,Chen, Hui,Ng, Siu Choon,Wang, Xizu,Sun, Xiaowei,Matthew Hu, Xiao
, p. 14 - 23 (2016)
A series of fluorene-free bipolar star-shaped molecules, Sn-Cz-OXD (n = 1-5), with increasing conjugated length in branches were synthesized as high efficient blue emitters for OLEDs. With the extension of conjugated branches, the solid PL quantum efficiency and external quantum efficiency of Sn-Cz-OXD significantly increased with longer spacer, while the emission spectrum of these materials exhibited a blue-shift with enhanced color purity due to the unique molecular design. All materials maintained exceptionally high thermal stability after prolonged heat treatment at 150 °C in air. The photophysical, electrochemical, thermal properties of these emitters were studied in relation to the molecular structure. Nondoped device based on S4-Cz-OXD with structure ITO/PEDOT:PSS/EML/TPBI/LiF/Al emitted stable pure blue light with CIE coordinates of (0.157, 0.146). It exhibited high current efficiency and external quantum efficiency of 4.96 cd A-1 and 4.20%, respectively. These values are among the best results for solution-processed non-doped blue device based on fluorene-free materials, indicating its potential for commercial applications.
Suzuki polycondensation with a hairpin monomer
Sangvikar, Yogesh,Fischer, Karl,Schmidt, Manfred,Schlueter, A. Dieter,Sakamoto, Junji
supporting information; experimental part, p. 4112 - 4115 (2009/12/09)
Two straight monomers were subjected to an AA/BB-type Suzuki polycondensation with a hairpin-shaped 1,8-anthrylene monomer as the counterpart leading to a novel polyarylene which should have the preferred conformation of a folded chain. The molar masses w
