High quantum yields generated by a multi-band quantum dot photocell

We perform the quantum yields in a multi-band quantum dot (QD) photocell via doping an intermediate band (IB) between the conduction band (CB) and valence band (VB). Under two different sub-band gap layouts, the output power has a prominent enhancement than the single-band gap photocell and the achi...

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Bibliographic Details
Published in:Superlattices and microstructures 2020-01, Vol.137, p.106329, Article 106329
Main Authors: Zhao, Shun-Cai, Wu, Qi-Xuan
Format: Article
Language:English
Subjects:
a multi-band quantum dot photocell
Photo-to-charge efficiency
Quantum yields
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Summary:We perform the quantum yields in a multi-band quantum dot (QD) photocell via doping an intermediate band (IB) between the conduction band (CB) and valence band (VB). Under two different sub-band gap layouts, the output power has a prominent enhancement than the single-band gap photocell and the achieved peak photo-to-charge efficiency reaches to 74.9% as compared to the limit efficiency of 63.2% via the IB approach in the theoretical solar cell prototype. The achieved quantum yields reveal the potential to improve efficiency by some effective theoretical approaches in the QD-IB photocell. •Achieved a higher peak efficiency74.9% than 63.2% achieved in theoretical IB prototype.•Proposed a QD-IB photocell scheme with two different gap parameter configurations.•Revealed the crucial role of quantum regime in different ambient temperatures.
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2019.106329