Light-emitting material and organic light-emitting device
The invention relates to a light-emitting material having high emitting efficiency, high luminance and durability for use in an organic light-emitting device and to an organic electroluminescent (EL) device, in which the light-emitting material is used. The light-emitting material contains a light-emitting substance which is spatially constricted and confined in an order of two dimensions or more, thus providing a high efficient organic light-emitting device based on emission of phosphorescence from an excited triplet state.
1. An organic light-emitting device comprising:
a light-emitting layer containing
a light emitting substance which is spatially constricted and confined in an order of two or more dimensions on the level of molecule, wherein the light-emitting substance emits light by electric excitation, and a nucleic acid having a helix structure or a derivative thereof, wherein the nucleic acid or derivative thereof defines a space for constricting and confining the light-emitting substance therein,
and at least one of a hole-transport layer, an electron-transport layer and an electrode layer.
2. The organic light-emitting device as claimed in claim 1 , wherein light emission from the light-emitting substance is light emission from an excited triplet state or light emission through an excited triplet state.
3. The light-emitting material device according to claim 1 , wherein the nucleic acid is synthetic and is RNA.
4. The light-emitting device as claimed in claim 1 wherein the nucleic acid is DNA.
5. The light-emitting device as claimed in claim 1 wherein the nucleic acid is RNA.
6. The light-emitting device as claimed in claim 1 wherein the nucleic acid is synthetic.
7. A light-emitting material comprising
a light-emitting substance spatially constricted and confined in an order of two or more dimensions on the level of molecule, wherein the light-emitting substance emits light by electric excitation, and
a nucleic acid having a helix structure or a derivative thereof, wherein the nucleic acid or derivative thereof defines a space for constricting and confining the light-emitting substance therein, and the nucleic acid is a combination of a polydeoxyadenylic acid homopolymer chain and a polydeoxythimidylic acid homopolymer chain.
8. A light-emitting material comprising
a light-emitting substance spatially constricted and confined in an order of two or more dimensions on the level of molecule, wherein the light-emitting substance emits light by electric excitation, and
a nucleic acid having a helix structure or a derivative thereof, wherein the nucleic acid or derivative thereof defines a space for constricting and confining the light-emitting substance therein, and the nucleic acid is a combination of a polydeoxyadenylic acid homopolymer chain and a polydeoxycytydylic acid homopolymer chain.