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An open circuit voltage decay system for performing injection dependent lifetime spectroscopy.

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Carrier lifetime, a crucial semiconductor parameter, is complex and must be measured. A new system and algorithms accurately extract carrier lifetime and recombination parameters from PIN diodes.

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Area of Science:

  • Semiconductor physics and device engineering.
  • Materials science and characterization.

Background:

  • Carrier lifetime is a critical, dynamic parameter in semiconductor devices, influencing performance metrics like conductivity modulation, on-state voltage, and reverse recovery.
  • It serves as a key indicator for device fabrication process control and material quality.
  • Unlike static parameters, carrier lifetime's variability necessitates direct measurement.

Purpose of the Study:

  • To introduce a novel, stand-alone system for measuring carrier lifetime across a wide injection range.
  • To develop and implement unique algorithms for accurate carrier lifetime extraction.
  • To validate the system and algorithms by extracting fundamental recombination parameters from a commercial high-voltage PIN diode.

Main Methods:

  • Development of a wide-injection range open-circuit voltage decay (OCVD) system.
  • Implementation of advanced lifetime extraction algorithms.
  • Application of lifetime spectroscopy techniques for parameter extraction.

Main Results:

  • Successful operation of the stand-alone OCVD system.
  • Accurate extraction of carrier lifetime values.
  • Determination of fundamental recombination parameters in a high-voltage PIN diode.

Conclusions:

  • The developed OCVD system and extraction algorithms provide a robust method for measuring dynamic carrier lifetime.
  • This technique is valuable for material quality assessment and device process control.
  • The study demonstrates the system's efficacy in characterizing semiconductor device parameters.