An organic photovoltaic device comprises a first electrode, a first carrier transporting layer, an active layer, a second carrier transporting layer, and a second electrode. The first electrode is a transparent electrode. The active layer includes a conjugated polymer material, which includes a structure of formula I:

##STR00001##

wherein R0, R0′, R0″, R0′″, Y1 and Y2 can be the same or different from each other, and independently selected from one of the following groups and their derivatives: C1˜C30 alkyl, C3˜C30 branched alkyl, C1˜C30 silyl, C2˜C30 ester, C1˜C30 alkoxy, C1˜C30 alkylthio, C1˜C30 haloalkyl, C2˜C30 olefin, C2˜C30 alkyne, C2˜C30 carbon chain containing cyano, C1˜C30 carbon chain containing nitro, C1˜C30 carbon chain containing hydroxyl, C3˜C30 carbon chain containing keto, halogen, cyano, and hydrogen. The organic photovoltaic device of the present invention has good power conversion efficiency.

The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1 and a second host material comprising a compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising an organic electroluminescent compound according to the present disclosure as an organic electroluminescent material or the specific combination of the compound as host materials, an organic electroluminescent device having high luminous efficiency and/or long lifespan can be provided compared with a conventional organic electroluminescent device.

The present disclosure relates to an organic compound and an organic light emitting display device using the same wherein the organic compound is represented by Chemical Formula 1 and a display device using the organic compound. The organic compound represented by Chemical Formula 1 has excellent electron transport properties and durability and is used for an electron transport layer of an organic light emitting element, thereby lowering a driving voltage and improving the luminous efficiency and lifetime.

##STR00001##

(In the above Chemical Formula 1, at least two of X.sub.1, X.sub.2 and X.sub.3 are N, Y.sub.1 and Y.sub.2 are each independently a substituted or unsubstituted phenylene group or a single bond, at least one of Ar.sub.1 and Ar.sub.2 is selected from a substituted or unsubstituted triazine group, a functional group represented by Chemical Formula 2 and a functional group represented by Chemical Formula 3.)

Provided are a condensed cyclic compound represented by Formula 1 and an organic light-emitting device including the same:

##STR00001##

wherein, in Formula 1, X.sub.1, A.sub.1, L.sub.11, a11, Ar.sub.11, Ar.sub.12, b11, R.sub.11, R.sub.12, c11, and c12 are the same as defined in the specification.

An OLED device structure, an OLED display panel and a display device are provided. The OLED device structure includes: a first electrode; a self-assembled layer, disposed on the first electrode; a first transportation layer, disposed on the self-assembled layer; a light-emitting layer, disposed on the first transportation layer; a second transportation layer, disposed on the light-emitting layer; and a second electrode, disposed on the second transportation layer. The OLED display panel and the display device each include the OLED device structure. By setting a self-oriented self-assembled layer in the OLED device structure and selecting specific materials, advantages can be achieved as follows: an injection efficiency of hole is improved, a driving voltage is reduced, mobilities of electron and hole are increased, a luminous efficiency is increased, an external light coupling efficiency is increased, a light extraction rate is increased, and an external quantum efficiency is improved.

Provided are novel C.sub.3-symmetry high T.sub.1 energy host compounds. Also provided are formulations comprising these novel C.sub.3-symmetry high T.sub.1 energy host compounds. Further provided are OLEDs and related consumer products that utilize these novel C.sub.3-symmetry high T.sub.1 energy host compounds. The novel host compounds are represented by Formula I

##STR00001##

where the variables are defined herein.

Organic electronics applications, especially an organic light-emitting diode (OLED), an organic solar cell (organic photovoltaics) or a switching element such as an organic transistor, for example an organic FET (Field Effect Transistor) and an organic TFT (Thin Film Transistor), comprising at least one substituted phenoxasiline derivative, a organic semiconductor layer, a host material, electron/hole/exciton blocking material or electron/hole injection material comprising at least one substituted phenoxasiline derivative, the use of a substituted phenoxasiline derivative in organic electronics applications, an organic light-emitting diode, wherein at least one substituted phenoxasiline derivative is present in the electron/hole/exciton blocking layer, the electron/hole injection layer and/or the light-emitting layer, a light-emitting layer, an electron/hole/exciton blocking layer and an electron/hole injection layer comprising at least one substituted phenoxasiline derivative and a device selected from the group consisting of stationary visual display units, mobile visual display units; illumination units; keyboards; garments; furniture and wallpaper comprising at least one organic light-emitting diode, at least one light-emitting layer, at least one electron/hole/exciton blocking layer and/or at least one electron/hole injection layer according to the present invention.

Provided are an organic compound, an electroluminescent material and an application thereof. The organic compound has a structure represented by Formula I. With the design of the spiro parent structure and the introduction of specific substituents, the organic compound can prevent materials from stacking and reduce the crystallinity of the molecule. The design of the spiro structure and substituents make the organic material have a high triplet state energy level Ti, and the nitrogen heterocycle and its linking groups make the organic compound have characteristics of good electron and hole transport performances. The organic compound has suitable HOMO and LUMO energy levels, facilitating the coordination of adjacent layers in terms of energy level. The organic compound also has advantages of high glass-transition temperature and good molecular thermal stability. Therefore, the organic compound can effectively improve the light emitting efficiency and lifetime of the device.

A photoelectric conversion element including: a first electrode; a perovskite layer; a hole-transporting layer; and a second electrode, wherein the hole-transporting layer includes a compound represented by General Formula (1) or (1a) below;

##STR00001## where M represents an alkali metal; X.sub.1 and X.sub.2, which may be identical to or different from each other, each represent at least one selected from the group consisting of a carbonyl group, a sulphonyl group, and a sulfinyl group; and X.sub.3 represents at least one selected from the group consisting of a bivalent alkyl group, an alkenyl group, and an aryl group, and a hydrogen atom of the bivalent alkyl group, the alkenyl group, and the aryl group may be substituted with a halogen atom;

##STR00002## where M.sup.+ represents an organic cation; and X.sub.1, X.sub.2, and X.sub.3 have the same meanings as X.sub.1, X.sub.2, and X.sub.3 in the General Formula (1).

An amine compound and a light-emitting device including the same are provided. The amine compound is represented by Formula 1:

##STR00001##

In Formula 1, Ar.sub.1 is a group represented by Formula 1A, Ar.sub.2 is a group represented by Formula 1B, and the other substituents are understood by referring to the description of the disclosure.