2.3 Band Gap II
<p>May 22, 2015 08:12 PM</p>
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he continues (Delft U)</p>
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pub Nov 2013....</p>
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takes 2 electrons to make a bond</p>
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109 degrees...</p>
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4 electrons in outer shells</p>
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SP(3)...</p>
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SP3 hybrid.</p>
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how is a obnd made btwn 2 atoms...</p>
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two atoms mush approach; orbital has its own shape.</p>
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nature splits into indivs vs bonding level...
one electron up; the other is down;</p>
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lower energy level in the bond; and lower than the anti-bonding level.</p>
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go to minute 4.30 !</p>
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anti-bonding is the conduction band...</p>
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band gap is btwn valence and conduction...</p>
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carbon is not a semiconductor... look at bond length...</p>
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bondlength * 4/sqrt 2 = lattice constant.</p>
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diamond has largest band gap.</p>
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iii-v semiconductors.</p>
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one has 3 valence electrons; the other has 5 val electrons...</p>
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