Calculation of optical band gap of the semiconductor material method and calculation device

摘要

PROBLEM TO BE SOLVED: To provide a calculation method and a calculation device of optical band gap in a semiconductor material capable of properly calculating a band gap using a curve on a Tauc plot created based on a measurement data such as absorption spectrum.;SOLUTION: The calculation method and the calculation device of an optical band gap in a semiconductor material includes: a primary derivation value calculation step using an energy value X0 at which the value of the Tauc plot is the maximum; an approximation line calculation step in which an approximation line is calculated using Tauc plot points existing between two points as the object with respect to every sets of two points which are separated away from each other larger than a predetermined plot number in a predetermined energy range including X0, and inclination thereof is calculated; and a band gap determination step in which an energy value at an intersection point between the approximation line having maximum inclination in the approximation line calculated in the approximation line calculation step and the baseline of the Tauc plot as an optical band gap.;COPYRIGHT: (C)2014,JPO&INPIT