Change search
ReferencesLink to record
Permanent link

Direct link
Optical absorptions in AlxGa1-xAs/GaAs quantum well for solar energy application
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics.ORCID iD: 0000-0002-2442-1809
2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 112, no 5, 054314- p.Article in journal (Refereed) Published
Abstract [en]

We study the optical transitions among localized and extended states in quantum solar cells based on AlxGa1-xAs/GaAs quantum well (QW). The absorption coefficients of localized-to-localized, ground localized-to-extended, and extended-to-localized transitions are enhanced obviously as the size of the QW decreases. When the wave functions of incident electrons and holes spread along different sides of the structure, the absorption coefficient of extended-to-extended states becomes non-zero value when the QW is inserted. This process has a main contribution to the photocurrents. In addition, our studies also show these optical transitions have different sensitivities to the Fermi levels. Therefore, optical absorptions in AlxGa1-xAs/GaAs solar cells can be optimized by the sizes of QW and Fermi levels.

Place, publisher, year, edition, pages
2012. Vol. 112, no 5, 054314- p.
Keyword [en]
Efficiency, Cells, Layer
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-104707DOI: 10.1063/1.4749416ISI: 000309072200127ScopusID: 2-s2.0-84866366073OAI: diva2:567724

QC 20121114

Available from: 2012-11-14 Created: 2012-11-09 Last updated: 2015-03-04Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Yang, XifengFu, Ying
By organisation
Applied PhysicsCell Physics
In the same journal
Journal of Applied Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 33 hits
ReferencesLink to record
Permanent link

Direct link