No Slide TitleLi atomlarnn s ve p orbitalleri arasnda etkileim mevcut
T > 0 da, Fermi düzeyindeki e lar uyarlarak iletkenlik bantna geçer.
Bu e lar elektrik alannda hareket eder.
Bo
Dolu
389.psd
Have 1000 Si atoms
Band is completely filled
Yaltkanlar— iletkenlikleri çok düüktür
Elektrik letkenlii
391.psd
C 6.0
Si 1.1
Ge 0.7
Karbon 0
Safszlk Yariletkenleri
Safszlklar Ga, Al veya As atomlardr.
Alanan atom (dopant) Si atomlar ile yer deitirir.
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Acceptor level is slightly higher in energy than Fermi level.
Electrons readily promoted into acceptor level.
letkenlik band
Negative electrons are charge carriers and so called n-type.
Deerlik Band
Converts electrical input to light output: electron in photon out
Light source with long life, low power, compact design.
Applications: traffic and car lights, large displays.
Solar Cell
Converts light input to electrical output: photon in electron out
Renewable energy source!
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Composition of p/n regions tuned to produce red & blue lasers.
Green lasers (532 nm) use special optical means to double the frequency
of infrared light emitted from p/n junction.
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2000 MOs
2000 MOs