Patent ID: 9664564
Date: 2017-05-30
CPC Classifications: G01J,G01N,H01J

Claim:
1. A method for measuring unoccupied states of an organic sample, comprising: a) a step of generating an electron beam; b) a step of generating an electric potential difference between an electron beam generator and the organic sample by applying a bias voltage to the electron beam generator and/or the organic sample, and irradiating the organic sample with the electron beam whose incident energy with reference to a potential of the organic sample is changed within a range of 0 to 5 eV, the organic sample being degradable above 5 eV; c) a step of measuring intensity of light of a predetermined wavelength within a range of 180 to 700 nm included in electromagnetic waves emitted from the organic sample; and d) a step of determining unoccupied-states energy of the organic sample based on a spectrum created by the intensity of light with respect to the kinetic energy of the electron beam.