Abstract
Using first-principles method, we studied systematically the structural and electronic properties of ZB/WZ superlattices of ZnSe. The band offsets are calculated by Heyd-Scuseria-Ernzerhof (HSE) hybrid functional which can give a good prediction on the relative band positions. The band alignment at ZB/WZ interface is found to be type-II with holes localized in wurtzite region and electrons in zinc-blende region, which is suitable for optoelectronic and solar energy conversion. The origin of type-II character and the carrier localization are investigated in detail.
Original language | English |
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Article number | 1950269 |
Journal | Modern Physics Letters B |
Volume | 33 |
Issue number | 23 |
DOIs | |
Publication status | Published - 20 Aug 2019 |
Keywords
- HSE hybrid functional
- ZnSe films
- carrier localization
- polytypic superlattice