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description Publicationkeyboard_double_arrow_right Article 2013 United Kingdom, SwitzerlandPublisher:American Chemical Society (ACS) Funded by:EC | SANS, UKRI | Self-organized nanostruct..., NSF | Polymer self-assembly dir... +2 projectsEC| SANS ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materials ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,EC| PHOTO-EMGuldin, Stefan; Kohn, Peter; Stefik, Morgan; Song, Juho; Divitini, Giorgio; Ecarla, Fanny; Ducati, Caterina; Wiesner, Ulrich; Steiner, Ullrich;doi: 10.1021/nl402832u
pmid: 24124901
Low-cost antireflection coatings (ARCs) on large optical surfaces are an ingredient-technology for high-performance solar cells. While nanoporous thin films that meet the zero-reflectance conditions on transparent substrates can be cheaply manufactured, their suitability for outdoor applications is limited by the lack of robustness and cleanability. Here, we present a simple method for the manufacture of robust self-cleaning ARCs. Our strategy relies on the self-assembly of a block-copolymer in combination with silica-based sol-gel chemistry and preformed TiO2 nanocrystals. The spontaneous dense packing of copolymer micelles followed by a condensation reaction results in an inverse opal-type silica morphology that is loaded with TiO2 photocatalytic hot-spots. The very low volume fraction of the inorganic network allows the optimization of the antireflecting properties of the porous ARC despite the high refractive index of the embedded photocatalytic TiO2 nanocrystals. The resulting ARCs combine high optical and self-cleaning performance and can be deposited onto flexible plastic substrates.
Nano Letters arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsNano LettersArticle . 2013 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/nl402832u&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 158 citations 158 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 3visibility views 3 Powered bymore_vert Nano Letters arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsNano LettersArticle . 2013 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/nl402832u&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 United Kingdom, SwitzerlandPublisher:Wiley Funded by:FCT | EMC2, UKRI | Manufacturable nanoscale ..., EC | SANS +4 projectsFCT| EMC2 ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,EC| SANS ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materials ,FCT| EMC2 ,FCT| EMC2Docampo, P; Stefik, M; Guldin, S; Gunning, R; Yufa, NA; Cai, N; Wang, P; Steiner, U; Wiesner, U; Snaith, HJ;AbstractA new self‐assembly platform for the fast and straightforward synthesis of bicontinuous, mesoporous TiO2 films is presented, based on the triblock terpolymer poly(isoprene‐b‐styrene‐b‐ethylene oxide). This new materials route allows the co‐assembly of the metal oxide as a fully interconnected minority phase, which results in a highly porous photoanode with strong advantages over the state‐of‐the‐art nanoparticle‐based photoanodes employed in solid‐state dye‐sensitized solar cells. Devices fabricated through this triblock terpolymer route exhibit a high availability of sub‐bandgap states distributed in a narrow and low enough energy band, which maximizes photoinduced charge generation from a state‐of‐the‐art organic dye, C220. As a consequence, the co‐assembled mesoporous metal oxide system outperformed the conventional nanoparticle‐based electrodes fabricated and tested under the same conditions, exhibiting solar power‐conversion efficiencies of over 5%.
Advanced Energy Mate... arrow_drop_down Advanced Energy Materials; Oxford University Research ArchiveOther literature type . Article . 2012 . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementInfoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aenm.201100699&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Advanced Energy Mate... arrow_drop_down Advanced Energy Materials; Oxford University Research ArchiveOther literature type . Article . 2012 . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementInfoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aenm.201100699&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2011 Switzerland, United KingdomPublisher:Wiley Funded by:FCT | EMC2, FCT | EMC2, EC | SANS +4 projectsFCT| EMC2 ,FCT| EMC2 ,EC| SANS ,FCT| EMC2 ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materialsGuldin, Stefan; Docampo, Pablo; Stefik, Morgan; Kamita, Gen; Wiesner, Ulrich; Snaith, Henry J.; Steiner, Ullrich;pmid: 22174177
AbstractMorphology control on the 10 nm length scale in mesoporous TiO2 films is crucial for the manufacture of high‐performance dye‐sensitized solar cells. While the combination of block‐copolymer self‐assembly with sol–gel chemistry yields good results for very thin films, the shrinkage during the film manufacture typically prevents the build‐up of sufficiently thick layers to enable optimum solar cell operation. Here, a study on the temporal evolution of block‐copolymer‐directed mesoporous TiO2 films during annealing and calcination is presented. The in‐situ investigation of the shrinkage process enables the establishment of a simple and fast protocol for the fabrication of thicker films. When used as photoanodes in solid‐state dye‐sensitized solar cells, the mesoporous networks exhibit significantly enhanced transport and collection rates compared to the state‐of‐the‐art nanoparticle‐based devices. As a consequence of the increased film thickness, power conversion efficiencies above 4% are reached.
Oxford University Re... arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsSmallOther literature type . Article . 2011 . Peer-reviewedLicense: Wiley Online Library User Agreementadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/smll.201102063&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 37 citations 37 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 2visibility views 2 Powered bymore_vert Oxford University Re... arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsSmallOther literature type . Article . 2011 . Peer-reviewedLicense: Wiley Online Library User Agreementadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/smll.201102063&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
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description Publicationkeyboard_double_arrow_right Article 2013 United Kingdom, SwitzerlandPublisher:American Chemical Society (ACS) Funded by:EC | SANS, UKRI | Self-organized nanostruct..., NSF | Polymer self-assembly dir... +2 projectsEC| SANS ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materials ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,EC| PHOTO-EMGuldin, Stefan; Kohn, Peter; Stefik, Morgan; Song, Juho; Divitini, Giorgio; Ecarla, Fanny; Ducati, Caterina; Wiesner, Ulrich; Steiner, Ullrich;doi: 10.1021/nl402832u
pmid: 24124901
Low-cost antireflection coatings (ARCs) on large optical surfaces are an ingredient-technology for high-performance solar cells. While nanoporous thin films that meet the zero-reflectance conditions on transparent substrates can be cheaply manufactured, their suitability for outdoor applications is limited by the lack of robustness and cleanability. Here, we present a simple method for the manufacture of robust self-cleaning ARCs. Our strategy relies on the self-assembly of a block-copolymer in combination with silica-based sol-gel chemistry and preformed TiO2 nanocrystals. The spontaneous dense packing of copolymer micelles followed by a condensation reaction results in an inverse opal-type silica morphology that is loaded with TiO2 photocatalytic hot-spots. The very low volume fraction of the inorganic network allows the optimization of the antireflecting properties of the porous ARC despite the high refractive index of the embedded photocatalytic TiO2 nanocrystals. The resulting ARCs combine high optical and self-cleaning performance and can be deposited onto flexible plastic substrates.
Nano Letters arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsNano LettersArticle . 2013 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/nl402832u&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 158 citations 158 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!visibility 3visibility views 3 Powered bymore_vert Nano Letters arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsNano LettersArticle . 2013 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/nl402832u&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2012 United Kingdom, SwitzerlandPublisher:Wiley Funded by:FCT | EMC2, UKRI | Manufacturable nanoscale ..., EC | SANS +4 projectsFCT| EMC2 ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,EC| SANS ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materials ,FCT| EMC2 ,FCT| EMC2Docampo, P; Stefik, M; Guldin, S; Gunning, R; Yufa, NA; Cai, N; Wang, P; Steiner, U; Wiesner, U; Snaith, HJ;AbstractA new self‐assembly platform for the fast and straightforward synthesis of bicontinuous, mesoporous TiO2 films is presented, based on the triblock terpolymer poly(isoprene‐b‐styrene‐b‐ethylene oxide). This new materials route allows the co‐assembly of the metal oxide as a fully interconnected minority phase, which results in a highly porous photoanode with strong advantages over the state‐of‐the‐art nanoparticle‐based photoanodes employed in solid‐state dye‐sensitized solar cells. Devices fabricated through this triblock terpolymer route exhibit a high availability of sub‐bandgap states distributed in a narrow and low enough energy band, which maximizes photoinduced charge generation from a state‐of‐the‐art organic dye, C220. As a consequence, the co‐assembled mesoporous metal oxide system outperformed the conventional nanoparticle‐based electrodes fabricated and tested under the same conditions, exhibiting solar power‐conversion efficiencies of over 5%.
Advanced Energy Mate... arrow_drop_down Advanced Energy Materials; Oxford University Research ArchiveOther literature type . Article . 2012 . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementInfoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aenm.201100699&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 59 citations 59 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!more_vert Advanced Energy Mate... arrow_drop_down Advanced Energy Materials; Oxford University Research ArchiveOther literature type . Article . 2012 . 2016 . Peer-reviewedLicense: Wiley Online Library User AgreementInfoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/aenm.201100699&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2011 Switzerland, United KingdomPublisher:Wiley Funded by:FCT | EMC2, FCT | EMC2, EC | SANS +4 projectsFCT| EMC2 ,FCT| EMC2 ,EC| SANS ,FCT| EMC2 ,UKRI| Manufacturable nanoscale architectures for heterojunction solar cells ,UKRI| Self-organized nanostructures in hybrid solar cells ,NSF| Polymer self-assembly directed hybrid nanostructures: from amorphous to polycrystalline to single crystal materialsGuldin, Stefan; Docampo, Pablo; Stefik, Morgan; Kamita, Gen; Wiesner, Ulrich; Snaith, Henry J.; Steiner, Ullrich;pmid: 22174177
AbstractMorphology control on the 10 nm length scale in mesoporous TiO2 films is crucial for the manufacture of high‐performance dye‐sensitized solar cells. While the combination of block‐copolymer self‐assembly with sol–gel chemistry yields good results for very thin films, the shrinkage during the film manufacture typically prevents the build‐up of sufficiently thick layers to enable optimum solar cell operation. Here, a study on the temporal evolution of block‐copolymer‐directed mesoporous TiO2 films during annealing and calcination is presented. The in‐situ investigation of the shrinkage process enables the establishment of a simple and fast protocol for the fabrication of thicker films. When used as photoanodes in solid‐state dye‐sensitized solar cells, the mesoporous networks exhibit significantly enhanced transport and collection rates compared to the state‐of‐the‐art nanoparticle‐based devices. As a consequence of the increased film thickness, power conversion efficiencies above 4% are reached.
Oxford University Re... arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsSmallOther literature type . Article . 2011 . Peer-reviewedLicense: Wiley Online Library User Agreementadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/smll.201102063&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 37 citations 37 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 2visibility views 2 Powered bymore_vert Oxford University Re... arrow_drop_down Infoscience - EPFL scientific publicationsArticleData sources: Infoscience - EPFL scientific publicationsSmallOther literature type . Article . 2011 . Peer-reviewedLicense: Wiley Online Library User Agreementadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/smll.201102063&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu