Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back AlGaInN and AlGaInP LED quantum efficiency investigation in pulse regime АRHIPOV A.L. RABINOVICH O.I. Used in the measurement technique eliminates the direct current heating of the crystal, and also allow to identify and explain the significant difference in the assessment of the real and driven by the manufacturers of the luminous efficiency of LEDs. Investigated in a pulsed mode LEDs whole spectral range, including red, yellow, green and blue colors and are set according to the changes in the quantum yield of the current density. This method of assessing the quality of LED chips can be further used in the construction of highpower LEDs operating at high current densities. Key words: lightemitting diodes, simulation, AlGaInN, AlGaInP, the luminous efficiency, spectral range, the quantum yield, high current densities. Contacts: E-mail: rabinwork@mail.ru Pp. 36-39.