419536-33-7Relevant articles and documents
Novel thiophene-containing push-pull chromophores that include carbazole and triphenylamine moieties: study of optical and electrochemical properties
Bakiev, Artur N.,Selivanova, Darya G.,Lunegov, Igor V.,Vasyanin, Aleksandr N.,Maiorova, Olga A.,Gorbunov, Aleksei A.,Shklyaeva, Elena V.,Abashev, Georgii G.
, p. 379 - 387 (2016)
[Figure not available: see fulltext.] Novel carbazole- and triphenylamine-containing alkylidene malononitriles that include thiophene and bithienyl fragments as π-spacers were synthesized. Quantum-chemical calculations of the frontier molecular orbital energies were performed using the B3LYP/6-31G(d) method with regard to solvent. Electronic absorption spectra and fluorescence spectra were recorded for all the obtained compounds; their electrochemical properties were also studied. The experimental energy values of HOMO and LUMO levels were derived from resulting data. Thin films were obtained by the spin coating technique, and their surface morphology was studied using a NTEGRA Prima scanning tunneling microscope.
A bipolar emitting material for high efficient non-doped fluorescent organic light-emitting diode approaching standard deep blue
Fan, Shigen,You, Jing,Miao, Yanqin,Wang, Hua,Bai, Qingyun,Liu, Xicheng,Li, Xianggao,Wang, Shirong
, p. 34 - 42 (2016)
A deep blue emitting compound 9-(4′-(1,4,5-triphenyl-1H-imidazol-2-yl)-[1,1′-biphenyl] -4-yl)-9H-carbazole was designed and synthesized. The emitting compound characters as donor-π-acceptor structure with carbazole as the electron-donor and imidazole as the electron-acceptor. The emitting compound shows high quantum yield (0.87) in solution and good thermal stability. The emitting compound exhibits bipolar transporting characteristics identified by single-carrier devices. The non-doped fluorescent organic light-emitting diode with the emitting compound as emitting layer exhibits emission peak at 420 nm and full width at half maximum of 54 nm, maximum current efficiency of 2.30 cd/A, and maximum power efficiency of 1.52 lm/W, which are higher than most reported deep blue emitters with a y coordinate ≤0.064. The chromaticity coordinate is stable at (0.166, 0.064) with increasing operation voltage.
Red emissive organic light-emitting diodes based on codeposited inexpensive CuI complexes
Ni, Tianchi,Liu, Xiaochen,Zhang, Tao,Bao, Hongliang,Zhan, Ge,Jiang, Nan,Wang, Jianqiang,Liu, Zhiwei,Bian, Zuqiang,Lu, Zhenghong,Huang, Chunhui
, p. 5835 - 5843 (2015)
Inexpensive materials made of abundant natural resources such as CuI complexes are essential to sustain the development of organic light emitting diode (OLED) technology for mass market applications such as solid-state illumination. CuI complexes, however, mostly are neither soluble nor stable toward sublimation, which is a road block for the development of efficient CuI complex based OLEDs using traditional methods of synthesis, sublimation and vacuum evaporation. In this work, two isoquinolyl carbazole (CIQ) compounds 9-(8-(carbazol-9-yl)isoquinolin-5-yl)-carbazole (DCIQ) and 9-(4-(5-(4-(carbazol-9-yl)phenyl)isoquinolin-8-yl)phenyl)-carbazole (DCDPIQ) were synthesized to codeposition with copper iodide (CuI) to form red emissive dimeric CuI complex doped film in situ, which could be utilized directly as the emissive layer (EML) in OLEDs. After a systematic study of the two compounds and their codeposited CuI:CIQ films, as well as optimizing the CuI doping concentration, it is found that red OLEDs can be achieved, showing a maximum emission band, an external quantum efficiency (EQE), a luminance of 643 nm, 3.5%, 3290 cd m-2 for DCIQ, and 635 nm, 3.6%, 853 cd m-2 for DCDPIQ, respectively.
COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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Paragraph 0143; 0146-0148, (2020/07/29)
The present invention provides a compound of chemical formula 1 and an organic light emitting device comprising the same. The compound according to an embodiment of the present invention has excellent lifespan characteristics and can have high luminous efficiency even at a low driving voltage.COPYRIGHT KIPO 2020
ORGANIC COMPOUNDS, ORGANIC LIGHT EMITTING DIODE AND ORGANIC LIGHT EMITTID DEVICE HAVING THE COMPOUNDS
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, (2019/09/04)
The present invention relates to an organic compound in which a bipyrimidine moiety serving as an electron acceptor is connected via an aromatic linker to a hetero-aromatic moiety serving as an electron donor and containing one to two nitrogen atoms. The organic compound, since it contains both electron donor and electron acceptor moieties in a single molecule, allows electric charges to move easily, thereby increasing luminance efficiency. Also, since the electron donor is made of solid condensed aromatic rings, such as carbazole, acridine, or indole rings, the 3D structure of the molecule is hindered. Thus, the organic compound of the present invention may be used as a delayed fluorescence dopant emitting a blue light of high chromatic purity. The organic compound of the present invention may be applied to organic light-emitting devices, such as an organic light-emitting diode, a display device, and a lighting device, to lower the driving voltage thereof while increasing luminance efficiency and chromatic purity thereof.COPYRIGHT KIPO 2019
