Kim, Donghoe | Search NASA

DOE OSTI2022

Oriented perovskite crystals and methods of making the same

An aspect of the present disclosure is a method that includes combining a first organic salt (A1X1), a first metal salt (M1(X2)2), a second organic salt (A2X3), a second metal salt (M2Cl2), and a solvent to form a primary solution, where A1X1 and M1(X2)2 are present in the primary solution at a first ratio between about 0.5 to 1.0 and about 1.5 to 1.0, and A2X3 to M2Cl2 are present in the primary solution at a second ratio between about 2.0 to 1.0 and about 4.0 to 1.0. In some embodiments of the present disclosure, at least one of A1 or A2 may include at least one of an alkyl ammonium, an alkyl diamine, cesium, and/or rubidium.

Zhu, Kai↗

DOE OSTI2021

Organic-inorganic perovskite materials and methods of making the same

The present disclosure relates to a method that includes treating a liquid that includes a first precursor at a concentration C1, a second precursor at a concentration C2, a third precursor at a concentration C3, and an additive at a concentration C4, where the treating results in a perovskite, each of C1, C2, and C3 are between 0.001 M and 100 M, inclusively, and at least one of C4/C1 or C4/C2 equals a ratio greater than or equal to zero

Zhu, Kai↗

DOE OSTI2021

Mixed three-dimensional and two-dimensional perovskites and methods of making the same

An aspect of the present disclosure is a perovskite that includes A(n−1−nw+w)A′(wn−w)A″2BnX(3n−3zn+3z−4e+1)X′(3zn−3z)X″4e, where each of A, A′, A″ are monovalent cations, B is a divalent cation, each of X, X′, and X″ are monovalent anions, 0<w≤1, 0<z≤1, 0<e≤1, and 1≤n≤100000.

Zhu, Kai↗

DOE OSTI2020

Oriented perovskite crystals and methods of making the same

An aspect of the present disclosure is a method that includes combining a first organic salt (A1X1), a first metal salt (M1(X2)2), a second organic salt (A2X3), a second metal salt (M2Cl2), and a solvent to form a primary solution, where A1X1 and M1(X2)2 are present in the primary solution at a first ratio between about 0.5 to 1.0 and about 1.5 to 1.0, and A2X3 to M2Cl2 are present in the primary solution at a second ratio between about 2.0 to 1.0 and about 4.0 to 1.0. In some embodiments of the present disclosure, at least one of A1 or A2 may include at least one of an alkyl ammonium, an alkyl diamine, cesium, and/or rubidium.

14 SOLAR ENERGY↗