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Using modular components and instruments available on the market enables building well customized QE configurations that offer great flexibility needed by solar cell researchers for testing existing and new solar cells.
Quantum efficiency (QE) measurement is one of the most significant characterization tools for solar cells, allowing for quantifying the efficiency of the conversion of light to electrons as a function of wavelength of the impinging light. The measurement is used to test new cell structures and materials as well as to verify the reproducible production of solar cells and modules. There are only a few turn-key QE measurement systems available and by definition these systems have defined limits. Building a measurement system based on modular components offers great flexibility and customization possibilities to meet the specific and changing demands of researchers, but several aspects have to be considered for choosing the proper components for a high accuracy measurement system. This article is a discussion of needed hardware for QE measurement from light beam generation to its absorption by the cell under test.
This week's RE Insider is Tom Gibson, the Editor of Progressive Engineer who writes about wind power in Pennsylvania and the Mid-Atlantic region. He writes, "In 1999, Pennsylvania and the Mid-Atlantic had no wind energy at all, and we now have more than 100 megawatts coming online. That's enough to power 38,000 homes."