Ionizing radiation conversion device and ionizing radiation detection method

An ionizing radiation detection method using an ionizing radiation conversion device, the ionizing radiation conversion device comprising:

• a first electrode;
• a second electrode;
• and
• an ionizing radiation conversion layer disposed between the first electrode and the second electrode,
• wherein
• the first electrode contains a first metal,
• the second electrode contains at least one selected from the group consisting of second metals and metal oxides,
• the ionizing radiation conversion layer contains a perovskite compound, and
• the difference of a value of electron affinity of the ionizing radiation conversion layer minus a value of work function of the first electrode is greater than or equal to 0 eV and less than or equal to 0.4 eV,
• and wherein the ionizing radiation detection method detects, with the ionizing radiation conversion device, charges generated by the perovskite compound upon irradiation with an ionizing radiation.