BAND GAP MEASURING METHOD AND BAND GAP MEASURING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a band gap measuring method capable of estimating in-plane distribution of a band gap in a short time.SOLUTION: A band gap measuring method includes: a step S201 of causing a measuring object to emit light; a step S202 of receiving the light emitted by the measuring object not via an optical filter and imaging a first image of the measuring object; a step S203 of receiving the light emitted by the measuring object via the optical filter and imaging a second image of the measuring object; a step S204 of calculating a luminance ratio between the first image and the second image; and a step S205 of calculating a band gap of the measuring object on the basis of the luminance ratio. In a relationship between a wavelength and a transmittance of the optical filter, the transmittance does not have a maximum value and a minimum value.SELECTED DRAWING: Figure 4