Triphenylbenzene is a kind of aromatic compound with special structure and C3 symmetry. Non-linear small molecules with triphenylbenzene as the core have highly delocalized π electrons and good optical, electrical, magnetic properties, and are a class of potential electroluminescent organic molecular materials and important organic synthesis intermediates. Triphenylbenzene derivatives containing functional groups have unique properties due to their dendritic-like spatial structure characteristics. In the field of semiconductors, triphenylbenzene derivatives can be used in electronic devices as important components such as hole transport layers, light-emitting materials, and p-type semiconductors.
Figure 1. Chemical structures of triphenylbenzene
- Organic semiconductor film: An organic semiconductor film is a film formed by coating a low molecular weight organic substance with photoelectric conversion function together with a binder resin on a suitable substrate and drying. Using functional groups to modify the structure of triphenylbenzene compounds can obtain semiconductor small organic molecules with good properties. Such organic compounds have the advantages of higher glass transition temperature, better heat resistance, and reversible redox process. These advantages enable the triphenylbenzene derivative to easily prepare a practical organic semiconductor thin film by a coating method or a vacuum evaporation method. In addition, the triphenylbenzene derivative can form a stable and durable high-performance semiconductor thin film at a relatively high temperature without using a binder resin. In electronic devices, organic semiconductors composed of amorphous films of organic substances are widely used. The triphenylbenzene derivatives semiconductor thin film can be applied to electrophotographic devices as a hole transport layer, and can also be applied to solar cells as an organic p-type semiconductor film.
- Light-emitting materials: For triphenylbenzene derivatives, light-emitting materials with excellent comprehensive properties can be obtained by optimizing the molecular structure of the core, linking unit and end group respectively. These light-emitting materials have good solubility, film-forming properties, thermal stability and high carrier transport properties, so that the light-emitting device has stable light-emitting efficiency.
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