Skip to Main content Skip to Navigation
Theses

Fabrication and investigation of III-V quantum structured solar cells with Fabry-Pérot cavity and nanophotonics in order to explore high-efficiency photovoltaic concepts : towards an intermediate band assisted hot carrier solar cell

Abstract : In the past decade, photovoltaics (PV) has become a key player for the future of worldwide energy generation. Innovation in PV is likely to rely on high efficiency PV with flexible and lightweight thin films to enable PV deployement for mobile applications. In the framework of the Japanese-French laboratory “NextPV”, this thesis investigates the development of III-V quantum structured solar cells to explore high-efficiency photovoltaic concepts especially intermediate band solar cells (IBSC). Quantum structured IBSC have proven to be limited by thermal escape at room temperature and by low subbandgap light absorption. Following a consistent approach, we evaluate the topology, thermal escape mechanism, quantum structure and optical absorption of In(Ga)As quantum dots in a wide gap Al0.2GaAs host material. We also characterize quantitatively the device operation and improve the optical design. For a high irradiation, we evidence a hot carrier population in the quantum dots. At the same time, sequential two-photon absorption (S-TPA) is demonstrated both optically and electrically. We also show that S-TPA for both subbandgap transitions can be enhanced by a factor x5-10 with light management techniques, for example by implementation of Fabry-Perot cavities with the different epitaxial transfer methods that we developed. More advanced periodical nanostructures were also fabricated in the case of multi-quantum well solar cells using nanoimprint lithography techniques. Overall we discuss the possibility of realizing intermediate-band-assisted hotcarrier solar cells with light management to open the path for high-efficiency quantum structured IBSC.
Complete list of metadatas

Cited literature [272 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02406272
Contributor : Abes Star :  Contact
Submitted on : Thursday, December 12, 2019 - 9:25:07 AM
Last modification on : Sunday, October 25, 2020 - 4:44:04 PM
Long-term archiving on: : Friday, March 13, 2020 - 3:13:58 PM

File

BEHAGHEL_Benoit_these.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02406272, version 1

Citation

Benoît Behaghel. Fabrication and investigation of III-V quantum structured solar cells with Fabry-Pérot cavity and nanophotonics in order to explore high-efficiency photovoltaic concepts : towards an intermediate band assisted hot carrier solar cell. Materials Science [cond-mat.mtrl-sci]. Université Pierre et Marie Curie - Paris VI, 2017. English. ⟨NNT : 2017PA066729⟩. ⟨tel-02406272⟩

Share

Metrics

Record views

167

Files downloads

185