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Development of the ...
Development of the Morphology during Functional Stack Build-up of P3HT:PCBM Bulk Heterojunction Solar Cells with Inverted Geometry
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Wang, Weijia (author)
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Proeller, Stephan (author)
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Niedermeier, Martin A. (author)
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Koerstgens, Volker (author)
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Philipp, Martine (author)
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Su, Bo (author)
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Gonzalez, Daniel Mosegui (author)
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- Yu, Shun (author)
- KTH,Polymera material,Wallenberg Wood Science Center
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Roth, Stephan V. (author)
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Mueller-Buschbaum, Peter (author)
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(creator_code:org_t)
- 2014-12-22
- 2015
- English.
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In: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 7:1, s. 602-610
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Highly efficient poly(3-hexylthiophene-2,5-diyl) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction solar cells are achieved by using an inverted geometry. The development of the morphology is investigated as a function of the multilayer stack assembling during the inverted solar cell preparation. Atomic force microscopy is used to reveal the surface morphology of each stack, and the inner structure is probed with grazing incidence small-angle X-ray scattering. It is found that the smallest domain size of P3HT is introduced by replicating the fluorine-doped tin oxide structure underneath. The structure sizes of the P3HT:PCBM active layer are further optimized after thermal annealing. Compared to devices with standard geometry, the P3HT:PCBM layer in the inverted solar cells shows smaller domain sizes, which are much closer to the exciton diffusion length in the polymer. The decrease in domain sizes is identified as the main reason for the improvement of the device performance.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Textil-, gummi- och polymermaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Textile, Rubber and Polymeric Materials (hsv//eng)
Keyword
- P3HT PCBM
- BHJ solar cell
- inverted solar cell
- GISAXS
- morphology
Publication and Content Type
- ref (subject category)
- art (subject category)
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