728039-63-2Relevant articles and documents
Effect of arylamino-carbazole containing hole transport materials on the device performance and lifetime of OLED
Joung, Kuk Soung,Kim, Kyu Sung,Kim, Seung Uk,Tak, So Hyun,Yu, Jae-Woong
, (2021/11/16)
We synthesized four hyper-conjugated aromatic hole transporting materials with different molecular geometry and energy levels by attaching arylamino moiety attached to the carbazole core. A brominated carbazole moiety reacted with an arylamino moiety using a Buchwald-Hartwig reaction. The characteristics of these hole transporting materials were investigated using TGA, DSC, UV–Vis and luminescence spectroscopy. The energy levels of all materials used in this study were estimated from cyclic voltammograms and absorption spectra. The hole transporting properties of the synthesized molecules were measured using single-carrier devices. All four hole transporting materials showed similar hole mobility. The effectiveness of hole transporting materials was compared by fabricating green-emitting organic light emitting diode (OLED) devices. It turned out that the device performances were critically dependent on the relative energy levels of the hole transporting layer and emission layer. However, the molecular geometry greatly influenced the device lifetime, determining thermally induced crystallization by the heat produced during device operation.
Triarylamine derivative, preparation method, application and device thereof
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Paragraph 0164-0167, (2019/10/02)
Belonging to the technical field of photoelectric material applied science and technology, the invention in particular relates to a triarylamine derivative, a preparation method and application thereof. The triarylamine derivative provided by the invention adopts triarylamine and fluorenocarbazole as the basic structural unit, and after modification, an asymmetric structure can be obtained so as to compose compounds rich in holes and with high glass transition temperature. When the compounds are used as a hole transport material, compared with the commonly used hole transport material like N,N'-diphenyl-N, N'-bis(3-methylphenyl)-1, 1'-biphenyl-4, 4'-diamine (TPD) in the prior art, the hole transport ability is significantly improved, in OLEDs, the series of compounds have significantly improved starting voltage and glass transition temperature compared with the traditional hole transport materials, and are ideal hole transport materials. In addition, when the series of compounds are used as a light-emitting layer, the efficiency of OLEDs is greatly improved, and the series of compounds are ideal light-emitting layer materials.
Arylamine-based compound and organic light emitting diode comprising the same
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, (2018/05/16)
An arylamine-based compound is represented by Formula 1 below. The arylamine-based compound is included in an organic light emitting diode.