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Howard W. Yoon

Advancing spectroradiometry for improvements in fundamental and disseminated standards for spectral power responsivity, spectral radiance, spectral irradiance, radiance temperature, and solar energy.


U.S. expert on non-contact thermometry to the Consultative Committee for Thermometry

Member of IEC TC65/SC65B/WG5

Research projects:

Radiation thermometry
Spectroradiometry of sources
Photovoltaic calibrations


  • DOC Silver Award, 2008
  • Allen V. Astin Award, 2005
  • Allen V. Astin Award, 2004


Nonlinear Response of Silicon Solar Cells

Behrang H. Hamadani, Andrew M. Shore, Howard W. Yoon, Mark Campanelli
We used an LED-array-based combinatorial flux addition method to explore the wavelength and the intensity-dependence of the spectral responsivity in silicon

Broadband Radiometric LED Measurements

George P. Eppeldauer, Catherine C. Cooksey, Howard W. Yoon, Leonard M. Hanssen, Vyacheslav B. Podobedov, Robert E. Vest, Uwe Arp, Carl C. Miller
At present, broadband radiometric measurements of LEDs with uniform and low-uncertainty results are not available. Currently, either spectral radiometric
Created October 9, 2019