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<p>making them useful in <a href="page.php?w=thermoelectric_cooler">thermoelectric cooler</a>s.</p>

<p><big> Materials </big></p>
<p>A large number of elements and compounds have semiconducting properties, including:<br/>
* Certain pure elements are found in <a href="page.php?w=Group_14_elements">group&nbsp;14</a> of the <a href="page.php?w=periodic_table">periodic table</a>; the most commercially important of these elements are <a href="page.php?w=silicon">silicon</a> and <a href="page.php?w=germanium">germanium</a>. Silicon and germanium are used here</p><p>
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