Band gap alingment

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Valentin Bogatu

You can do this, depending on what semiconductors you have in the heterojunction. Read this please

https://www.tf.uni-kiel.de/matwis/amat/semi_en/kap_5/backbone/r5_3_1.html

You have to know the work function the semiconductors and the Fermi level position to align the bands.

Ben F. Spencer

SKPFM (Kelvin probe atomic force microscopy) can also be used to measure this, if you have a cross section, e.g. Article Quantitative Operando Visualization of the Energy Band Depth...

Saad Zahraw Sekhi

I agree with Valentin Bogatu.