Patent ID: 8779766

Claim:
An electron spin measuring device of organic thin film elements, comprising: at least one sampling tube which a test sample is inserted into and sealed with a specified gas or in vacuum; and a cavity resonator into which the at least one sampling tube is inserted; an electrical characteristics measuring device for evaluating organic thin film elements as the test sample; a wire connecting the electric characteristics measuring device and the sample in the at least one sampling tube; and a light receiving and emitting device which irradiates light to the sample and/or detects emission from the organic thin film elements, wherein a microwave having a vibration frequency corresponding to Zeeman energy splitting produced by unpaired electron spins is irradiated in the cavity resonator, and a transition between energy levels produced upon reversing the direction of electron spin is measured; and a control apparatus which connects the electrical characteristics measuring device and the light receiving and emitting device by a communication line, wherein the electron spin measuring device measures the characteristic of the organic thin film elements and the characteristic of the electron spin at the same time and outputs temporal change data of the both characteristics.