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<p>overall <a href="page.php?w=solar_cell_efficiency">energy conversion efficiency</a> value. Note that in the event of <a href="page.php?w=multiple_exciton_generation">multiple exciton generation</a> (MEG), quantum efficiencies of greater than 100% may be achieved since the incident photons have more than twice the <a href="page.php?w=band_gap">band gap</a> energy and can create two or more electron-hole pairs per incident photon.</p>

<p><big>Types</big></p>
<p>Two types of quantum efficiency of a solar cell are often considered:</p>

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