951208-47-2Relevant academic research and scientific papers
The electrochemical fabrication of electroactive polymer films from diamide- or diimide-cored N-phenylcarbazole dendrons for electrochromic applications
Hsiao, Sheng-Huei,Lin, Shu-Wei
, p. 1271 - 1280 (2016/02/18)
Two series of novel diamide- or diimide-cored N-phenylcarbazole dendrons were synthesized from condensation reactions of 3,6-di(carbazol-9-yl)-N-(4-aminophenyl)carbazole (NH2-3Cz) with aromatic dicarboxylic acids and tetracarboxylic dianhydrides, respectively. These dendrons can be electropolymerized into crosslinked poly(amide-carbazole) and poly(imide-carbazole) films on the electrode surface in an electrolyte solution via the coupling reactions between carbazole radical cations. Cyclic voltammograms of the electro-generated polymer films showed two reversible oxidation redox couples accompanied by a color change from the colorless neutral state to the yellow-green and blue oxidized forms in the range of 1.11-1.34 V. The electrochromic behavior of the film is clearly interpreted on the basis of spectroelectrochemical studies. Single layer electrochromic cells were also fabricated as preliminary evaluation for their application as electrochromic devices.
ORGANIC LIGHT EMITTING MATERIALS
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Page/Page column 57, (2011/02/24)
The present invention provides a blue light emitting compound having (1) a backbone portion, which backbone portion includes a hole transporting portion comprising a triarylamine group; (2) a side chain portion attached to the backbone portion, which side chain portion includes an electron transporting portion comprising an electron deficient aryl group; and (3) a spacer portion located between the hole transporting portion and the electron transporting portion.
Conjugated copolymers comprised cyanophenyl-substituted spirobifluorene and tricarbazole-triphenylamine repeat units for blue-light-emitting diodes
Lin, Ying,Zhi-Kuan, Chen,Ye, Teng-Ling,Dai, Yan-Feng,Ma, Dong-Ge,Ma, Zhun,Liu, Qin-De,Chen, Yu
experimental part, p. 292 - 301 (2010/11/02)
A series of conjugated blue-light-emitting copolymers, PTC-1, PTC-2, and PTC-3, comprised different ratios of electron-withdrawing segments (spirobifluorene substituted with cyanophenyl groups) and electron-donating segments (tricarbazole-triphenylamines), has been synthesized. The structures of these polymers were characterized and their thermal, photophysical, electrochemical, and electroluminescence properties were measured. Incorporation of rigid spirobifluorene units into the copolymers led to blue-shifted absorption peaks in dilute toluene solution. Cyclic voltammetric measurement indicated the bandgaps of the polymers were in the range of 2.77-2.94 eV. It was found that increasing cyanophenyl-spirobifluorene content in the polymer backbone lowered both the HOMO and LUMO energy levels of the copolymers, which was beneficial for electron injection/ transporting in the polymer layer of the device. OLED device evaluation indicated that all the polymers emitted sky blue to deep blue light when the pure polymers were used as the emissive layers in the devices with a configuration of ITO/ PEDOT:PSS/polymers/CsF/Ca/Al. The devices have been optimized by doping 30 wt % PBD into the polymer layers. Among the doped devices, PTC-2 showed the best performance with the turn-on voltage of 3.0 V, maximum brightness of 7257 cd/m2, maximum current efficiency of 1.76 cd/A, and CIE coordinates of (0.15, 0.14).
