More about our Founder, Halden Field


  • Master of Engineering (1987) and Bachelor of Science (1986) in electrical engineering from Cornell University
  • Professional courses on uncertainty analysis, optical system design, and photovoltaic system design and installation


  • Designed, developed, built, and installed solar cell characterization equipment for customers throughout the world, PV Measurements, Inc., 1999 to present
  • Developed photovoltaic cell and module measurement systems and procedures, and provided measurements to the PV community, PV Cell and Module Performance Characterization Group, National Renewable Energy Laboratory, 1992-1999
  • Developed laser scribing processes and built factory machinery for laser scribing of amorphous silicon solar panels, Chronar Corporation, 1987-1989
  • Explored the applicability of solar cell LBIC scanning technique for semiconductor parameter determination, Cornell University, 1986-1987

Selected Publications

  • Cell Binning Method Analysis to Minimize Mismatch Losses and Performance Variation in Si-Based Modules, 29th IEEE Photovoltaic Specialists Conference, May 2002
  • UV-VIS-IR Spectral Responsivity Measurement System for Solar Cells (PDF 60 KB), National Center for Photovoltaics Program Review Meeting, September 1998 (note: the optical configuration described in this paper is not used in PV Measurements' QE systems)
  • Solar Cell Spectral Response Measurement Errors Related to Spectral Bandwidth and Chopped Light Waveform (PDF 50 KB), 26th IEEE Photovoltaic Specialists Conference, September 1997
  • Radiometry for Characterizing Photovoltaic Devices in the Laboratory, Photovoltaics Radiometric Measurements Workshop, July 1995
  • Performance Measurements of CdTe and CIS Solar Cells and Modules, PV Performance and Reliability Workshop, September 1994
  • An Uncertainty Analysis of the Spectral Correction Factor, 23rd IEEE Photovoltaic Conference, May 1993
  • Sensitivity of Diffusion Length Determination on Background Current Collection Efficiency in Light Beam Induced Current Analysis Using the Zook Equation, Journal of Applied Physics, July 1988

Professional Memberships

  • American Society for Testing and Materials Subcommittee E44.09 on Solar Energy Conversion
Call +1 303.386.3950 or email to discuss your photovoltaic characterization needs.