US 12,265,189 B2
Perovskite thick film, preparation method thereof, and radiation detector comprising the same
Kuo-Wei Huang, Hsinchu (TW); Jen-An Chen, Hsinchu (TW); and Yung-Liang Tung, Hsinchu (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by Industrial Technology Research Institute, Hsinchu (TW)
Filed on Dec. 29, 2022, as Appl. No. 18/148,092.
Claims priority of application No. 111147240 (TW), filed on Dec. 8, 2022.
Prior Publication US 2024/0192387 A1, Jun. 13, 2024
Int. Cl. G01T 1/20 (2006.01); C23C 18/12 (2006.01)
CPC G01T 1/2018 (2013.01) [C23C 18/1204 (2013.01); C23C 18/1283 (2013.01); C23C 18/1295 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A radiation detector, comprising:
a substrate;
a pixel array formed on the substrate;
a perovskite thick film with a cubic phase formed on the pixel array;
a first electrode formed on the perovskite thick film and is opposite to the pixel array; and
a readout circuit,
wherein the perovskite thick film is formed by a perovskite having a chemical formula ABX3;
A is a monovalent cation selected from the group consisting of substituted or unsubstituted ammonium ions, substituted or unsubstituted amidine ions, Cs+, Rb+, Li+ and Na+;
B is a divalent cation selected from the group consisting of Ca2+, Sr2+, Cd2+, Cu2+, Ni2+, Mn2+, Fe2+, Co2+, Pd2+, Ge2+, Sn2+, Pb2+, Yb2+, and Eu2+; and
X is a monovalent anion each independently selected from the group consisting of F−, Cl−, Br−, I−, SCN− and OCN−,
wherein the perovskite thick film comprises a crown ether compound, and the crown ether compound is at least one selected from the group consisting of 12-crown-4, 15-crown-5, 18-crown-6, 21-crown-7, 24-crown-8, and 30-crown-10.