The discussion centers on the impact of electrical contacts on energy states in a one-dimensional particle in a box quantum well. When an external electric field is applied via the contact, the energy levels of electrons and holes experience a slight shift. The exciton absorption remains resolvable but shifts to lower energies, with the specifics varying based on the material system. For further reading, the standard reference is D.A.B. Miller et al.'s paper on the quantum confined Stark effect published in Phys. Rev. Lett. 53, 2173–2176 (1984).
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Cthugha said:If you use the contact to apply an external electric field (which I suppose is your intention) the energy levels of electrons and holes will shift slightly. If you are interested in optical properties, you will typically find that the exciton absorption is still resolvable and shifts to lower energies. Details will of course depend strongly on your material system.
If you are interested in some particular material look for any article containing "quantum confined Stark effect" and your choice of system in the title. Otherwise the standard reference on the quantum confined Stark effect is D.A.B. Miller et al., "Band-Edge Electroabsorption in Quantum Well Structures: The Quantum-Confined Stark Effect", Phys. Rev. Lett. 53, 2173–2176 (1984).