WFRF:(Louis Marie)
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Reflective Back Contacts for Ultrathin Cu(In,Ga)Se2-Based Solar Cells
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- Gouillart, Louis (author)
- Univ Paris Sud, Ctr Nanosci & Nanotechnol C2N, CNRS, F-91120 Palaiseau, France; CNRS, UMR 9006, IPVF, F-91120 Palaiseau, France
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- Chen, Wei-Chao (author)
- Uppsala universitet,Solcellsteknik
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- Cattoni, Andrea (author)
- Univ Paris Sud, Ctr Nanosci & Nanotechnol C2N, CNRS, F-91120 Palaiseau, France
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- 2020
- 2020
- English.
- In: IEEE Journal of Photovoltaics. - 2156-3381 .- 2156-3403. ; 10:1, s. 250-254
- Journal article (peer-reviewed)
Abstract
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- We report on the development of highly reflective back contacts (RBCs) made of multilayer stacks for ultrathin CIGS solar cells. Two architectures are compared: they are made of a silver mirror coated either with a single layer of In 2 O 3 :Sn (ITO) or with a bilayer of ZnO:Al/ITO. Due to the improvement of CIGS rear reflectance, both back contacts result in a significant external quantum efficiency enhancement, in agreement with optical simulations. However, solar cells fabricated with Ag/ITO back contacts exhibit a strong shunting behavior. The key role of the ZnO:Al layer to control the morphology of the top ITO layer and to avoid silver diffusion through the back contact is highlighted. For a 500-nm-thick CIGS layer, this optimized RBC leads to a best cell with a short-circuit current of 27.8 mA/cm 2 (+2.2 mA/cm 2 as compared to a Mo back contact) and a 12.2%-efficiency (+2.5% absolute).
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- 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
- In2O3:Sn
- photovoltaic cells
- reflective back contacts
- ultrathin Cu(In
- Ga)Se-2
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- ref (subject category)
- art (subject category)
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- Gouillart, Louis
- Chen, Wei-Chao
- Cattoni, Andrea
- Goffard, Julie
- Riekehr, Lars
- Keller, Jan
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- Jubault, Marie
- Naghavi, Negar
- Edoff, Marika, 1 ...
- Collin, Stéphane
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