Abstract: An electroluminescence device having an emission layer comprising a single organic compound layer between a cathode and an anode. The single layer may comprise an emitter component on a single polymer chain of covalently linked (co)-polymer sections Y1, optionally in combination with Y2, and/or Y3, or different polymer chains Y1, optionally in combination with Y2, and/or Y3 blended together. Each of the (co)-polymer contains a spacer unit and a carrier transporting component and optionally an emitter moiety.

Abstract: An organic electroluminescent device comprising: a pair of electrodes comprising an anode and a cathode, and one or more layers of organic compound arranged between the pair of electrodes, wherein the organic compound layer, or one or more of the organic compound layers, comprises a compound represented by a substituted imidazole. The substituents on the imidazole ring may be selected from a range of suitable substituents, including: substituted or unsubstituted aryl groups, substituted or unsubstituted heterocyclic groups, substituted or unsubstituted alkyl groups or cyano groups. In various aspects of the invention, at least one of the substituent groups may be a substituted or unsubstituted imidazole or thiophene group.

Abstract: A method for making a chalcopyrite-type compound includes reacting a reaction mixture in a solvent under a reaction temperature and a reaction pressure to form the chalcopyrite-type compound. The reaction mixture includes at least one first compound and at least one second compound. The first compound contains M1 and A. The reaction temperature ranges from 130-280° C. and the reaction pressure is greater than 3 Kg/cm2. The second compound contains M2 and A. M1 is selected from Cu, Au, Ag, Na, Li and K, M2 is selected from In, Ga, Al, Ti, Zn, Cd, Sn, Mg, and combinations thereof, and A is selected from S, Se, Te, and combinations thereof.

Abstract: An organic electroluminescent device comprising: a pair of electrodes comprising an anode and a cathode, and one or more layers of organic compound arranged between the pair of electrodes, wherein the organic compound layer, or one or more of the organic compound layers, comprises a compound represented by a substituted imidazole. The substituents on the imidazole ring may be selected from a range of suitable substituents, including: substituted or unsubstituted aryl groups, substituted or unsubstituted heterocyclic groups, substituted or unsubstituted alkyl groups or cyano groups. In various aspects of the invention, at least one of the substituent groups may be a substituted or unsubstituted imidazole or thiophene group.

Abstract: An electroluminescence device having an emission layer comprising a single organic compound layer between a cathode and an anode. The single layer may comprise an emitter component on a single polymer chain of covalently linked (co)-polymer sections Y1, optionally in combination with Y2, and/or Y3, or different polymer chains Y1, optionally in combination with Y2, and/or Y3 blended together. Each of the (co)-polymer contains a spacer unit and a carrier transporting component and optionally an emitter moiety.

Abstract: A photovoltaic device includes: a back electrode; a transparent front electrode; a p-type semiconductor layer disposed between the transparent front electrode and the back electrode and made from a first semiconductor compound including M1, M2, and A1, the p-type semiconductor layer having a M1/M2 atomic ratio; and an n-type layered structure disposed between the p-type semiconductor layer and the transparent front electrode and cooperating with the p-type semiconductor layer to form a p-n junction therebetween. The n-type layered structure includes an n-type semiconductor layer made from a second semiconductor compound including M3, M4, and A2 and having a M3/M4 atomic ratio less than the M1/M2 atomic ratio and greater than 0.1 and less than 0.9.