Can someone give an example of excitons in a semiconductor whose absorption peaks are above the edge of fundamental absorption?

Viktor Vladimir Chistyakov @Viktor-Chistyakov

09 December 2024 1 1K Report

In other words, the excitons formed by a hole with an energy below the bottom of the valence band and an electron with an energy above the ceiling of the conduction band. No matter direct or not trabsition. If so then what about lifetmes of these exitons?

Thanx in advance for Your replies and refs.

Lakshmi Narayan Ramesan

Cu2O

Ref: Article Giant Rydberg excitons in the copper oxide Cu2O

Article Measuring the Exciton Binding Energy: Learning from a Decade...

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