The invention provides an all-day solar cell system that is capable of simultaneously generating and storing electricity, which allows efficient photocharge during the day and discharge at night.

Provided are new organometallic compounds which are tetradentate and which comprise either a platinum or a palladium atom as the central metal atom. Also provided are formulations which comprise these new organometallic compounds. Further provided are organic light emitting diodes (OLEDs) and related consumer products that utilize these new organometallic compounds.

A transition metal complex and an application thereof, a mixture and an organic electronic device, the structure of the transition metal complex being represented by general formula (I), wherein the definition of the symbols in general formula (I) is the same as that provided in the description.

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A light emitting display device includes: a first electrode positioned on a substrate; a second electrode overlapping the first electrode; a red emission layer, a green emission layer, a blue emission layer, and an infrared ray emission layer emitting light of different wavelengths and positioned between the first electrode and the second electrode; a green resonance auxiliary layer positioned between the green emission layer and the first electrode; and a blocking layer positioned between the green resonance auxiliary layer and the green emission layer, wherein the infrared ray emission layer and the green resonance auxiliary layer include the same material, and LUMO energy of the blocking layer is larger than LUMO energy of a green light emitting dopant included in the green emission layer.

A photoelectric conversion element including an electrically conductive support, a photoconductor layer including an electrolyte, a charge transfer layer including an electrolyte, and a counter electrode, in which the photoconductor layer has semiconductor fine particles carrying a metal complex dye represented by Formula (I). Also disclosed are a dye-sensitized solar cell; a metal complex dye, a dye solution, and a terpyridine compound or an esterified product thereof:

M(LA)(LD)(LX).sub.mX.(CI).sub.mYFormula (I)

wherein M represents a metal ion, LA represents a tridentate ligand represented by Formula (AL-1) as defined herein, LD represents a bidentate or tridentate ligand, at least one of coordinating atoms in LD bonded to the metal ion M is a nitrogen atom, at least one of the coordinating atoms is an anion, LX represents a monodentate ligand, mX represents 0 or 1, CI represents a counterion, and mY represents an integer of 0 to 3:

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A photoelectric conversion element includes a conductive support, a photoconductor layer including an electrolyte, a charge transfer layer including an electrolyte, and a counter electrode, in which the photoconductor layer has semiconductor fine particles carrying a metal complex dye represented by a specific formula.

A light emitting device and a manufacturing method therefor are provided, and the light emitting device includes an active layer including a light emitting material, an ionic material, and a polymer matrix, and the active layer is capable of being compressed and elongated and formed to be changed in luminous intensity depending on at least one of a pressure for the active layer and an elongation percentage of the active layer.

A light-emitting element having low driving voltage and high emission efficiency is provided. In the light-emitting element, a combination of a guest material and a host material forms an exciplex. The guest material is capable of converting triplet excitation energy into light emission. Light emission from the light-emitting layer includes light emission from the guest material and light emission from the exciplex. The percentage of the light emission from the exciplex to the light emission from the light-emitting layer is greater than 0 percent and less than or equal to 60 percent. The energy after subtracting the energy of light emission from the exciplex from the energy of light emission from the guest material is greater than 0 eV and less than or equal to 0.23 eV.

An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2Formula 1 wherein groups M, L.sub.1, L.sub.2, n1, and n2 are the same as they are defined in the specification.

An organometallic compound and an organic light-emitting device including the same. The organometallic compound is represented by Formula 1. In Formula 1, the substituents are the same as described in the detailed description of the current disclosure. ##STR00001##