Radiation detectors having perovskite films

A radiation detector, comprising:

• a substrate;
• a perovskite film disposed on the substrate and capable of detecting alpha particles;
• and
• a first contact disposed on the perovskite film and a second contact disposed on the substrate,
• wherein the perovskite film has a thickness in a range of from 100 nanometers (nm) to 50 micrometers (μm),
• wherein the first contact comprises a plurality of first contacts,
• wherein the second contact comprises a plurality of second contacts, and
• wherein the radiation detector further comprises an anode electrically connected to one of the first contacts and a cathode electrically connected to another of the first contacts.