Illustrative embodiments of the invention generally relate to photovoltaics and solar energy harvesting devices and, particularly, to those that are transparent or semi-transparent, allowing sufficient visible light through them to allow visualization of objects through them, and more particularly, to those that supplement their primary near ultraviolet light absorption with secondary and/or tertiary absorptions of narrow bands of visible light while maintaining their transparency. Various embodiments of the invention relate to single solar materials with both primary ultraviolet absorption and secondary, narrow-band visible absorption, while some embodiments of the invention utilize mixtures of one or more materials to realize a primary ultraviolet absorption of light with secondary, or even tertiary, narrow bands of visible light absorption. Means of manufacturing such photovoltaics and solar energy harvesting devices will also be disclosed as well as the applications and uses thereof.

The present application relates to technical field of organic semiconductors and provides an arylamine compound and use thereof in photoelectric devices. The compound is composed of a N,N-dialkyl-dicarbazole amine functional group modified unit with larger conjugated system. The semiconductor material provided by the present application has high glass transition temperature, high solubility, good film forming property and high thermal stability of film morphology, and can be used as a hole transport material in photoelectric devices to realize excellent thermal stability. The compound has simple preparation process, easily available raw materials and low price, and is suitable for industrial production. High glass transition temperature and good thermal stability are beneficial to prolong the working life of optoelectronic devices. High solubility, can form amorphous film with excellent quality, and is beneficial to application in photoelectric devices; The device has high photoelectric conversion efficiency and is a hole transport material with excellent performance.

A compound represented by the following formula (1), wherein in the formula, L.sub.1 and L.sub.2 are predetermined linking groups, and Ar.sub.1 is a monovalent group having a structure represented by the following formula (2). ##STR00001##

The present invention describes dibenzofuran derivatives substituted by electron-deficient heteroaryl groups, and electronic devices, especially organic electroluminescent devices, comprising these compounds as triplet matrix materials.

Provided are new compositions of matter for host materials in OLEDs by incorporating deuterated moieties in the organic molecules. Also provided are formulations comprising these deuterated compounds. Further provided are OLEDs and related consumer products that utilize these deuterated compounds.

A compound represented by the following formula (1), wherein in the formula, L.sub.1 and L.sub.2 are predetermined linking groups, and Ar.sub.1 is a monovalent group having a structure represented by the following formula (2).

##STR00001##

The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure as a single host material, or the specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to provide an organic electroluminescent device having improved luminous efficiency.