601454-33-5Relevant articles and documents
Solution processable red iridium dendrimers containing oligocarbazole dendrons for efficient nondoped and doped phosphorescent OLEDs
Zhao, Lei,Wang, Shumeng,Lü, Jianhong,Ding, Junqiao,Wang, Lixiang
, p. 9753 - 9760 (2017)
Solution processable red Ir dendrimers named R-D1, R-D2 and R-D3, which contain a quinoline-based homoleptic complex as the core and oligocarbazole as the dendron, have been facilely and successfully designed and synthesized via a post-dendronization procedure. With the increasing dendron generation from R-D1 to R-D3, the intermolecular interactions and luminescence quenching in solid states are found to be effectively prevented because of encapsulation from the outer dendrons. As a result, the third-generation dendrimer R-D3 achieves the best nondoped device performance, revealing a promising EQE of 10.5% (9.2 cd A-1, 7.0 lm W-1) with CIE coordinates of (0.67, 0.33). Furthermore, the doped devices of R-D3 show a wide doping concentration window in the range of 5-30 wt%, and a maximum EQE as high as 18.3% (25.7 cd A-1, 33.0 lm W-1) is realized at about a 10 wt% doping content. The results can compete well with vacuum-deposited small molecular red phosphors, representing important progress on solution processable phosphorescent dendrimers with red emission.
Alkylated indolo[3,2,1-jk]carbazoles as new building blocks for solution processable organic electronics
Chen, Jiangshan,Fr?hlich, Johannes,Jin, Guangrong,Kader, Thomas,Kautny, Paul,Ma, Dongge,Pletzer, Matthias
, (2021/06/16)
A facile strategy for the introduction of tert-butyl and hexyl chains to the indolo[3,2,1-jk]carbazole scaffold is presented. With these building blocks six materials based on three different 4,4′-bis(N-carbazolyl)-1,1-biphenyl derivatives with varying degree of planarization were prepared. Characterization of the materials showed that the alkyl chains have only minor effects on the photophysical properties of the compounds. In contrast, thermal robustness towards decomposition and electrochemical stability are increased by the introduced alkyl chains. Detailed investigation of the solubility in five different solvents revealed that the incorporation of the alkyl chains increases the solubility significantly. The increased solubility of the materials allowed the application as host materials in red, green and sky-blue solution processed phosphorescent organic light emitting diodes. Hence, this work presents the first solution processed light emitting devices based on the indolo[3,2,1-jk]carbazole scaffold.
Organic light-emitting material containing benzo[c][1,2,5]thiadiazole derivative receptor structural unit and application
-
Paragraph 0060-0062, (2020/08/09)
The invention provides an organic light-emitting material based on a donor-receptor structure of a benzo[c][1,2,5]thiadiazole-4-aldehyde group receptor and a 2-(benzo[c][1,2,5]thiadiazole-4-methylene)malononitrile receptor and application thereof. The organic light-emitting material is a receptor-donor separation system, wherein the receptor is benzo[c][1,2,5]thiadiazole-4-aldehyde or 2-(benzo[c][1,2,5]thiadiazole-4-methylene) malononitrile, and a donor is carbazole and a derivative or benzoxazine and the like. The lowest unoccupied molecular orbital (LUMO) in the material is located in the receptor, and the highest occupied molecular orbital (HOMO) in the material is located in the donor, so that the molecular orbital energy level of the luminescent material can be effectively regulated and controlled through electrical regulation of the receptor structure and the donor. By regulating and controlling the structure of the light-emitting material or the electron donating capability of the donor, the light-emitting color of material molecules can be conveniently regulated. The organic light-emitting material has the characteristic that the light-emitting color is easy to adjust, andcan be used as a light-emitting material for preparing an OLED device.