2 November 2016 Effect of AlSb quantum dots on efficiency of GaAs solar cell (Conference Presentation)
Author Affiliations +
Abstract
Quantum Dots (QDs) have a broad applications in science and specifically in solar cell. Many research groups show that by adding QDs with lower bandgap respect to host material, the overall absorption of sun spectrum coverage will increase. Here, we propose using QDs with higher band gap respect to host material to improve efficiency of solar cell by improving quantum efficiency. GaAs solar cells have the highest efficiency in single junction solar cells. However, the absorption of GaAs is not good enough in wavelength lower than 550nm. AlSb can absorb shorter wavelength with higher absorption coefficient and also recombination rate should be lower because of higher bandgap of AlSb respect to GaAs. We embed AlSb QDs in GaAs solar cells and results show slight improvement in quantum efficiency and also in overall efficiency. Coverage of AlSb QDs has a direct impact on quality of AlSb QDs and efficiency of cell. In the higher coverage, intermixing between GaAs and AlSb causes to shift bandgap to lower value (having AlGaSb QDs instead of pure AlSb QDs). This intermixing decrease the Voc and overall efficiency of cell. In lower coverage, AlSb can survive from intermixing and overall performance of cell improves. Optimizing growth condition of AlSb QDs is a key point for this work. By using AlSb QDs, we can decrease the thickness of active layer of GaAs solar cells and have a thinner solar cell.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ahmad Mansoori, Sadhvikas J. Addamane, Emma J. Renteria, Darryl M. Shima, Christopher P. Hains, Ganesh Balakrishnan, "Effect of AlSb quantum dots on efficiency of GaAs solar cell (Conference Presentation)", Proc. SPIE 9937, Next Generation Technologies for Solar Energy Conversion VII, 99370A (2 November 2016); doi: 10.1117/12.2238291; https://doi.org/10.1117/12.2238291
PROCEEDINGS
PRESENTATION ONLY


SHARE
RELATED CONTENT

III-V quantum dot enhanced photovoltaic devices
Proceedings of SPIE (August 24 2010)
Quantum dot solar cells
Proceedings of SPIE (November 13 2001)
Study of InGaAs GaAs quantum dot saturation level for the...
Proceedings of SPIE (September 22 2010)

Back to Top