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Modeling Ga-profiles for Cu(In,Ga)Se2 thin film solar cells with varying defect density
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- Frisk, Christopher, 1985- (author)
- Uppsala universitet,Fasta tillståndets elektronik,Ångström Solar Center
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- Platzer-Björkman, Charlotte (author)
- Uppsala universitet,Fasta tillståndets elektronik,Ångström Solar Center
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- Fjällström, Viktor (author)
- Uppsala universitet,Fasta tillståndets elektronik,Ångström Solar Center
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- (creator_code:org_t)
- 2013
- 2013
- English.
- In: 23rd International Photovoltaic Science and Engineering Conference; Taipei, Taiwan; October 28 - Nov 1, 2013.
- Conference paper (peer-reviewed)
Abstract
Subject headings
Close
- The very best Cu(In,Ga)(S,Se)2 solar cells have a double graded band gap in the absorber, i.e. a notch profile, formed by varying the ratio of Ga to In. If this is a prerequisite or a consequence of high quality deposition methods is something yet of discussion. In this work we have constructed a high efficiency model (HE-T61) based on in-house state-of-the art Cu(In,Ga)Se2 solar cells, with efficiencies above 19 %, and investigated the role of the Ga-profile. Notch-type Ga-profiles have been compared with single graded profiles, and the influence of Ga-dependent defect distribution and metastable defects have been investigated showing that the optimum Ga-profile is dependent on such defect variations. It is also shown that within the HE-T61 model the optimized Ga-profile yields up to 3 % absolute efficiency gain, indicating that there is potential in band gap engineering.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Solar cells
- modeling
- simulation
- Ga-profile
- Engineering Science with specialization in Electronics
- Teknisk fysik med inriktning mot elektronik
Publication and Content Type
- ref (subject category)
- kon (subject category)
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