Method and Apparatus for Measuring Internal Quantum Efficiency of LED

摘要

optical device efficiency measurement methods are disclosed. Applying an excitation current to the optical element measures the intensity of light emitted from the optical element, where the relative luminous efficiency calculated from the ratio of the emission intensity for the current, and the maximum corresponding to the maximum relative light emission efficiency and maximum light emission efficiency relative here obtaining the current and the amount of change in the recombination coefficient in the active layer optical element with respect to the carrier concentration in the active optical element from the data of the maximum relative luminous efficiency of the excitation of the exciting current of the data of the current or less, and the maximum relative luminous efficiency is below a minimum extracting a reference excitation current, and calculates the optical element based on the internal quantum efficiency and the reference excitation current, and calculates the internal quantum efficiency of the optical element in a variety of excitation current from the reference internal quantum efficiency. ;