Impact of Crystal Surface on Photoexcited States in Organic-Inorganic Perovskites


Dateien zu dieser Ressource

Prüfsumme: MD5:ccd5516182ee6c420695d18ee8e994fe

BIRKHOLD, Susanne T., Eugen ZIMMERMANN, Tom KOLLEK, Daniel WURMBRAND, Sebastian POLARZ, Lukas SCHMIDT-MENDE, 2017. Impact of Crystal Surface on Photoexcited States in Organic-Inorganic Perovskites. In: Advanced Functional Materials. 27(6), 1604995. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.201604995

@article{Birkhold2017-02Impac-36978, title={Impact of Crystal Surface on Photoexcited States in Organic-Inorganic Perovskites}, year={2017}, doi={10.1002/adfm.201604995}, number={6}, volume={27}, issn={1616-301X}, journal={Advanced Functional Materials}, author={Birkhold, Susanne T. and Zimmermann, Eugen and Kollek, Tom and Wurmbrand, Daniel and Polarz, Sebastian and Schmidt-Mende, Lukas}, note={Article Number: 1604995} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:creator>Birkhold, Susanne T.</dc:creator> <dcterms:rights rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dcterms:isPartOf rdf:resource=""/> <dspace:isPartOfCollection rdf:resource=""/> <dc:date rdf:datatype="">2017-01-30T10:18:35Z</dc:date> <dc:creator>Wurmbrand, Daniel</dc:creator> <dc:rights>terms-of-use</dc:rights> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dspace:isPartOfCollection rdf:resource=""/> <dc:contributor>Birkhold, Susanne T.</dc:contributor> <dcterms:hasPart rdf:resource=""/> <dc:contributor>Polarz, Sebastian</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Kollek, Tom</dc:contributor> <bibo:uri rdf:resource=""/> <dspace:hasBitstream rdf:resource=""/> <dcterms:issued>2017-02</dcterms:issued> <dcterms:abstract xml:lang="eng">Despite their outstanding photovoltaic performance, organic–inorganic perovskite solar cells still face severe stability issues and limitations in their device dimension. Further development of perovskite solar cells therefore requires a deeper understanding of loss mechanisms, in particular, concerning the origin and impact of trap states. Here, different surface properties of submicrometer sized CH3NH3PbI3 particles are studied as a model system by photoluminescence spectroscopy to investigate the impact of the perovskite crystal surface on photoexcited states. Comparison of single crystals with either isolating or electron-rich surface passivation indicates the presence of positively charged surface trap states that can be passivated in case of the latter. These surface trap states cause enhanced nonradiative recombination at room temperature, which is a loss mechanism for solar cell performance. In the orthorhombic phase, the origin of multiple emission peaks is identified as the recombination of free and bound excitons, whose population ratio critically depends on trap state properties. The dynamics of exciton trapping at 50 K are observed on a time-scale of tens of picoseconds by a simultaneous population decrease and increase of free and bound excitons, respectively. These results emphasize the potential of surface passivation to further improve the performance of perovskite solar cells.</dcterms:abstract> <dc:contributor>Schmidt-Mende, Lukas</dc:contributor> <dc:creator>Polarz, Sebastian</dc:creator> <dcterms:title>Impact of Crystal Surface on Photoexcited States in Organic-Inorganic Perovskites</dcterms:title> <dc:creator>Zimmermann, Eugen</dc:creator> <dc:contributor>Zimmermann, Eugen</dc:contributor> <dcterms:available rdf:datatype="">2017-01-30T10:18:35Z</dcterms:available> <dc:creator>Kollek, Tom</dc:creator> <dc:creator>Schmidt-Mende, Lukas</dc:creator> <dc:language>eng</dc:language> <dc:contributor>Wurmbrand, Daniel</dc:contributor> </rdf:Description> </rdf:RDF>

Dateiabrufe seit 30.01.2017 (Informationen über die Zugriffsstatistik)

Birkhold_0-390204.pdf 19

Das Dokument erscheint in:

KOPS Suche


Mein Benutzerkonto