کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
79093 | 49348 | 2012 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Symmetry considerations in the empirical k.p Hamiltonian for the study of intermediate band solar cells Symmetry considerations in the empirical k.p Hamiltonian for the study of intermediate band solar cells](/preview/png/79093.png)
With the purpose of assessing the absorption coefficients of quantum dot solar cells, symmetry considerations are introduced into a Hamiltonian whose eigenvalues are empirical. In this way, the proper transformation from the Hamiltonian’s diagonalized form to the form that relates it with Γ-point exact solutions through k.p envelope functions is built accounting for symmetry. Forbidden transitions are thus determined reducing the calculation burden and permitting a thoughtful discussion of the possible options for this transformation. The agreement of this model with the measured external quantum efficiency of a prototype solar cell is found to be excellent.
Graphical AbstractFigure optionsDownload as PowerPoint slideHighlights
► Refined empirical k.p four band Hamiltonian with symmetry considerations.
► Group representation theory used for recipes for forbidden optical transitions.
► Wide discussion of the approximations involved.
► Detailed calculation of the sub-bandgap photon absorption.
► Excellent agreement between calculated and measured internal quantum efficiency.
Journal: Solar Energy Materials and Solar Cells - Volume 103, August 2012, Pages 171–183