Abstract
A novel method involving internal photoemission has been developed to determine the conduction band discontinuity Δ Ec of heterojunctions. The method is straightforward, accurate, and assumes minimum unknowns; and has been applied to GaAs/AlxGa1-xAs heterojunctions. We have found for x<0.4 that Δ Ec≅0.62 Δ Eg, where Δ Eg is the band-gap difference. For x>0.4, the apparent Δ Ec is considerably smaller.
Original language | English |
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Pages (from-to) | 503-505 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 47 |
Issue number | 5 |
DOIs | |
State | Published - 1985 |
Externally published | Yes |