Band-gap engineering in CIGS solar cells using Nelder-Mead simplex optimization algorithm
In: Proceedings of Symposium F on Thin Film and Nanostructured Materials for Photovoltaics, EMRS 2005 Conference, Strasbourg, France, May 31-June 3, 2005Thin solid films 511-12:60-65; Jg. 511-12 (2006) S. 60-65
Konferenz
- print, 19 ref
Zugriff:
Band-gap grading in a CIGS absorber and a conduction band offset at n/p hetero-interface are two important parameters of band-gap engineering aiming at high efficient CIGS solar cells. To obtain optimal CIGS absorber's band-gap grading profile an automatic optimization loop based on Nelder-Mead simplex optimization algorithm has been implemented. The optimization problem is described with an objective function, which-by varying the input parameters-is minimized or maximized. In our study two types of objective functions are used; optical and electrical. As the most optimal profile a parabolic, double graded band-gap profile with a positive or nearly zero conduction band offset at n/p hetero-interface is calculated. Structures with different CIGS absorber thicknesses and bulk and/or hetero-interface recombination lifetimes are examined and their optimized parameters are discussed in the light of experimental achievements.
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Band-gap engineering in CIGS solar cells using Nelder-Mead simplex optimization algorithm
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Autor/in / Beteiligte Person: | CEMIVEC, G ; KRC, J ; SMOLE, F ; TOPIC, M |
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Quelle: | Proceedings of Symposium F on Thin Film and Nanostructured Materials for Photovoltaics, EMRS 2005 Conference, Strasbourg, France, May 31-June 3, 2005Thin solid films 511-12:60-65; Jg. 511-12 (2006) S. 60-65 |
Veröffentlichung: | Lausanne: Elsevier Science, 2006 |
Medientyp: | Konferenz |
Umfang: | print, 19 ref |
ISSN: | 0040-6090 (print) |
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