Folded reflective tandem polymer solar cell doubles efficiency

Tvingstedt, Kristofer; Andersson, Viktor; Zhang, Fengling; Inganäs, Olle

doi:10.1063/1.2789393

Cited by 131 publications

(121 citation statements)

References 16 publications

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“…In order to address the problems seen with flat panel devices, it is clear that rethinking how organic Illustration of the v-geometry OSC (adapted from [133]). …”

Section: Progression To New Architecturesmentioning

confidence: 99%

Designs and Architectures for the Next Generation of Organic Solar Cells

et al. 2010

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Organic solar cells show great promise as an economically and environmentally friendly technology to utilize solar energy because of their simple fabrication processes and minimal material usage. However, new innovations and breakthroughs are needed for organic solar cell technology to become competitive in the future. This article reviews research efforts and accomplishments focusing on three issues: power conversion efficiency, device stability and processability for mass production, followed by an outlook for optimizing OSC performance through device engineering and new architecture designs to realize next generation organic solar cells.

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“…In order to address the problems seen with flat panel devices, it is clear that rethinking how organic Illustration of the v-geometry OSC (adapted from [133]). …”

Section: Progression To New Architecturesmentioning

confidence: 99%

Designs and Architectures for the Next Generation of Organic Solar Cells

et al. 2010

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“…If the materials are different, tandem combinations allows the division of the solar spectrum, between two materials. The standard geometry is a planar structure (not shown), with layers stacked on top of each other in tandem devices (Tvingstedt et al 2007a) (Fig. 2b) have been attempted, and while all work, the only relevant contribution for low cost nonconcentrating photovoltaics comes from folding of flexible cells.…”

Section: Designer Polymersmentioning

confidence: 99%

Alternating Copolymers and Alternative Device Geometries for Organic Photovoltaics

Inganäs

Zhang

Andersson

2012

AMBIO

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The efficiency of conversion of light to electrical energy with the help of conjugated polymers and molecules is rapidly improving. The optical absorption properties of these materials can be designed, and implemented via molecular engineering. Full coverage of the solar spectrum is thus feasible. Narrow absorption spectra allow construction of tandem solar cells. The poor transport properties of these materials require thin devices, which limits optical absorption. Alternative device geometries for these flexible materials compensate for the optical absorption by light trapping, and allow tandem cells.

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“…For that, some methods have been investigated. Two very explored approaches are ͑i͒ to obtain higher efficiencies in light absorption by directly "engineering" the active layer, e.g., through doping, 6 molecular blends, 7 among others, and ͑ii͒ to enhance the quantity of light in the system active region by incorporating optical elements in the device's architecture as, for instance, photonic crystals, 8 microlenses, 9 scattering layers, 10 dielectric mirrors, 11 gratings, 12 and folding substrates, 13 to cite just a few.…”

Section: Improving Light Harvesting In Polymer Photodetector Devices mentioning

confidence: 99%

Improving light harvesting in polymer photodetector devices through nanoindented metal mask films

Macedo

Zanetti

Mikowski

et al. 2008

Journal of Applied Physics

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To enhance light harvesting in organic photovoltaic devices, we propose the incorporation of a metal ͑aluminum͒ mask film in the system's usual layout. We fabricate devices in a sandwich geometry, where the mask ͑nanoindented with a periodic array of holes of sizes d and spacing s͒ is added between the transparent electrode and the active layer formed by a blend of the semiconducting polymer P3HT and substituted fullerene. Its function is to promote trapping of the incident light into the device's cavity ͑the region corresponding to the active layer͒. For d, we set a value that allows light diffraction through the holes in the relevant absorption range of the polymer. To optimize the mask structure, we consider a very simple model to determine the s leading to trapped fields that are relatively intense and homogeneous within the device. From measurements of the action spectra, we show that, indeed, such architecture can considerably improve the resulting photocurrent efficiencies-one order of magnitude in the best situation studied.

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Folded reflective tandem polymer solar cell doubles efficiency

Cited by 131 publications

References 16 publications

Designs and Architectures for the Next Generation of Organic Solar Cells

Designs and Architectures for the Next Generation of Organic Solar Cells

Alternating Copolymers and Alternative Device Geometries for Organic Photovoltaics

Improving light harvesting in polymer photodetector devices through nanoindented metal mask films

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