Measurement Techniques

, Volume 62, Issue 8, pp 708–713 | Cite as

Hardware-Software Complex for the Investigation of the Dynamic Characteristics of Separate Spectral Components of the Emission Spectrum of Leds

  • О. А. RadaevEmail author
  • V. А. SergeevEmail author
  • I. V. Frolov

We present the description of an automated hardware-software complex intended for measuring the 3 dB frequency of modulation and evaluation of the quantum efficiency of separate spectral components of the full spectrum of electroluminescence of light-emitting diodes, including the range of low levels of excitation. The principle of operation of this complex is based on measuring the spectrum of radiation of a light-emitting diode with the help of an OceanOptics USB2000+ spectrometer in the signal-accumulation mode in the course of transmission of current pulses with given amplitude and repetition frequency through the light-emitting diode with subsequent selection of separate spectral components from the full spectrum of radiation. We present the results of testing the hardware-software complex performed by measuring, as an example, the frequency characteristics of separate spectral components of the full electroluminescence spectrum of commercial InGaN green light-emitting diodes. The analyzed hardware-software complex can be used for the diagnostics of the quality of light-emitting heterostructures with quantum wells.


light-emitting diode (LED) electroluminescence spectral component spectral quantum efficiency 3 dB frequency radiative recombination nonradiative recombination lifetime of charge carriers 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Ulyanovsk Branch, Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of SciencesUlyanovskRussia
  2. 2.Ulyanovsk State Technical UniversityUlyanovskRussia

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