| 1. |
- Inganäs, Olle, et al.
(författare)
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Recent progress in thin film organic photodiodes
- 2001
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Ingår i: Synthetic metals. - 0379-6779 .- 1879-3290. ; 121:1-3, s. 1525-1528
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Tidskriftsartikel (refereegranskat)abstract
- We review current developments in organic photodiodes, with special reference to multilayer thin film optics, and modeling of organic donor-acceptor photodiodes. We indicate possibilities to enhance light absorption in devices by nanopatterning as well as by blending, and also discuss materials science issues of nanostructure in blends and in vertically stratified multilayer devices. Our current best devices have external efficiencies of 30-50% in between 400-600 nm, and show fill factors of 0.54 illuminated under weak monochromatic light.
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| 2. |
- Massetti, Matteo, et al.
(författare)
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Fully direct written organic micro-thermoelectric generators embedded in a plastic foil
- 2020
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Ingår i: Nano Energy. - : ELSEVIER. - 2211-2855 .- 2211-3282. ; 75
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Tidskriftsartikel (refereegranskat)abstract
- Organic materials have attracted great interest for thermoelectric applications due to their tuneable electronic properties, solution processability and earth-abundance, potentially enabling high-throughput realization of low-cost devices for low-power energy harvesting applications. So far, organic thermoelectricity has primarily focused on materials development, with less attention given to integrated generators. Yet, future applications will require the combination of efficient generators architectures and scalable manufacturing techniques to leverage the advantages of such promising materials. Here we report the realization of a monolithic organic micro-thermoelectric generator (mu-OTEG), using only direct writing methods, embedding the thermoelectric legs within a plastic substrate through a combination of direct laser writing and inkjet printing techniques. Employing PEDOT:PSS for the p-type legs and a doped fullerene derivative for the n-type ones, we demonstrate a mu-OTEG with power density of 30.5 nW/cm(2) under small thermal gradients, proving the concrete possibility of achieving power requirements of low-power, distributed sensing applications.
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| 3. |
- Svensson, M., et al.
(författare)
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High-performance polymer solar cells of an alternating polyfluorene copolymer and a fullerene derivative
- 2003
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 15:12, s. 988-991
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Tidskriftsartikel (refereegranskat)abstract
- High-performance polymer solar cells of an alternating polyfluorene copolymer, PFDTBT, and a fullerene derivative were studied. It was shown that PFDTBT is a promising candidate for obtaining high energy conversion efficiency when combined with a suitable electron acceptor. Results showed that high-performance solar cells with extended spectral coverage and increased open-circuit voltage could be prepared from composites prepared from electron acceptor.
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| 4. |
- Yohannes, T., et al.
(författare)
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Polyfluorene copolymer based bulk heterojunction solar cells
- 2004
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Ingår i: Thin Solid Films. - 0040-6090 .- 1879-2731. ; 449:1-2, s. 152-157
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Tidskriftsartikel (refereegranskat)abstract
- Bulk heterojunction solar cells based on blends of photoactive layers of polyfluorene copolymer Poly((2,7-(9-(2'-ethylhexyl)-9-hexyl-fluorene)-alt-5,5-(4', 7'-di-2-thienyl-2',1',3'-benzothiadiazole))-co-(2, 7-(9-(2'-ethylhexyl)-9-hexyl-fluorene)-alt-2,5-thiophene)) (LBPF3) acting as electron donor, and [6,6]-phenyl-C61-butyric acid methylester (PCBM), acting as electron acceptor, were constructed and studied. The power conversion efficiency for a 1:4 (by weight) blend of LBPF3:PCBM under simulated solar light illumination having light intensity of 100 mW/cm2 was 1.7%, and 9.2% under monochromatic (565 nm) light illumination with light intensity of 0.145 mW/cm2. The maximum external quantum efficiency (incident photons to converted electrons) for this device was found to be above 40% from 400 to 560 nm. The effects of blend composition and film thickness on the photovoltaic parameters were also studied. The incident light intensity dependence of the short circuit current showed a linear relationship. © 2003 Elsevier B.V. All rights reserved.
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| 5. |
- Zhang, Fengling, et al.
(författare)
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Polymer solar cells based on MEH-PPV and PCBM
- 2003
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Konferensbidrag (refereegranskat)abstract
- Polymer solar cells based on poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene(MEH-PPV) and fullerene derivative [6,6]phenyl-C61butyric acid methyl ester (PCBM) were fabricated by spin-coating. The improved performance has been achieved by blend polymer MEH-PPV with PCBM in a ratio of 1:4 by weight. The power conversion efficiency reached 1.3% under illumination of AM 1.5 with an incident power density of 78 mW/cm2 in blend single layer polymer solar cells.
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