Redox doping method for high-performance Sn perovskite solar cells
AssigneesThe Hong Kong University of Science and Technology, Jilin University
InventorsYuanyuan Zhou, Ning Wang
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Abstract
Europium doped tin perovskites useful in the fabrication of optoelectronic devices exhibiting improved stability and high-power conversion efficiencies and perovskite precursor solutions used to prepare the europium doped tin perovskite, wherein the europium doped tin perovskite can be represented by Formula 1: (A+)(Sn2+)(X−)3·m[(Eu2+)(Y−)2] 1 wherein m is 0.001-0.05; X− for each instance is independently F−, Cl−, Br−, or I−; Y− for each instance is independently F−, Cl−, Br−, or I−; and A+ is Cs+, Rb+, CH3NH3+, CH3CH2NH3+, H(C═NH2)NH2+, Me(C═NH2)NH2+, or a mixture thereof.
Claims15
A perovskite comprising Sn2+ and Eu2+, wherein the perovskite has Formula 1:
- (A+)(Sn2+)(X−)3·m[(Eu2+)(Y−)2] 1
- wherein m is 0.005-0.05;
- X− for each instance is independently F−, Cl−, Br−, or I−;
- Y− for each instance is independently F−, Cl−, Br−, or I−;
- and
- A+ is Cs+, Rb+, CH3NH3+, CH3CH2NH3+, H(C═NH2)NH2+, Me(C═NH2)NH2+, or a mixture thereof.
A perovskite precursor solution for preparing a perovskite of Formula 1:
- (A+)(Sn2+)(X−)3·m[(Eu2+)(Y−)2] 1
- comprising one or more tin salts, EuY2, AZ, optionally tin powder, and a solvent,
- wherein the one or more tin salts is represented by the formula SnX2, A is Cs+, Rb+, CH3NH3+, CH3CH2NH3+, H(C═NH2)NH2+, Me (C=NH2) NH2″, or a mixture thereof, X for each instance is independently F−, Cl-−, Br−, I−, or a mixture thereof, Y for each instance is independently F−, Cl−, Br−, I−, or a mixture thereof, Z is F−, Cl−, Br−, or I−, and the solvent comprises dimethyl formamide (DMF), dimethyl sulfoxide (DMSO), or a mixture thereof,
- wherein m is 0.005-0.05.
Dependencies are inferred from the claim text.