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|Author(s):||Behrang H. Hamadani; John F. Roller; Brian P. Dougherty; Howard W. Yoon;|
|Title:||Fast and Reliable Spectral Response Measurements of PV Cells Using Light Emitting Diodes|
|Published:||January 01, 2014|
|Abstract:||We present a measurement system for absolute differential spectral responsivity of solar cells based on high-powered LED arrays coupled to an optical light guide capable of large area illumination. Two different measurement techniques were developed and tested with the same measurement apparatus on a variety of solar cells. The first method is an individual LED lock-in technique that can be performed over a broad frequency range. The second method is based on synchronous multi-frequency optical excitation, called the Fourier transform (FT) technique, using the LEDs and detection with a spectrum analyzer. A scheme for providing light bias using the LEDs during either measurement scheme is discussed.|
|Conference:||39th IEEE PV Specialist Conference|
|Proceedings:||Proceedings of the 39th IEEE Photovoltaics Specialists Conference, June 16-21, 2013, Tampa, FL.|
|Pages:||pp. 0073 - 0075|
|Dates:||June 16-21, 2013|
|Keywords:||solar cells, spectral responsivity, light emitting diodes, Fourier transform|
|Research Areas:||Energy, Physics, Energy Conversion, Storage, and Transport, Solar, Alternative Energy, Measurements|
|DOI:||http://dx.doi.org/10.1109/PVSC.2013.6744102 (Note: May link to a non-U.S. Government webpage)|
|PDF version:||Click here to retrieve PDF version of paper (304KB)|