US 11,744,090 B2
Self-powered perovskite X-ray detector
Sang Hyuk Im, Hwaseong-si (KR); and Jin Hyuck Heo, Seoul (KR)
Assigned to Korea University Research and Business Foundation, Seoul (KR)
Appl. No. 17/629,508
Filed by Korea University Research and Business Foundation, Seoul (KR)
PCT Filed Jul. 23, 2020, PCT No. PCT/KR2020/009739
§ 371(c)(1), (2) Date Jan. 24, 2022,
PCT Pub. No. WO2021/015578, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 10-2019-0088845 (KR), filed on Jul. 23, 2019.
Prior Publication US 2022/0246873 A1, Aug. 4, 2022
Int. Cl. G01T 1/20 (2006.01); H10K 30/80 (2023.01); G01T 1/202 (2006.01)
CPC H10K 30/80 (2023.02) [G01T 1/202 (2013.01); G01T 1/2006 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A self-powered perovskite X-ray detector, comprising a perovskite photodetector placed under a scintillator configured to convert incident X-rays into visible light,
the perovskite photodetector comprising:
a substrate placed under the scintillator;
a first electrode formed under the substrate;
a hole transport layer formed under the first electrode;
a perovskite light absorption layer formed under the hole transport layer;
an electron transport layer formed under the perovskite light absorption layer; and
a second electrode formed under the electron transport layer,
wherein the scintillator and the perovskite light absorption layer comprise a perovskite compound represented by Formula 1 below:
AaMbXc  [Formula 1]
where A is a monovalent cation, M is a divalent metal cation or a trivalent metal cation, X is a monovalent anion, a+2b=c when M is a divalent metal cation, a+3b=4c when M is a trivalent metal cation, and a, b, and c are natural numbers, and
wherein the substrate of the perovskite photodetector contacts the scintillator.