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Article: Efficient Perovskite Solar Cells with a Novel Aggregation‐Induced Emission Molecule as Hole‐Transport Material

TitleEfficient Perovskite Solar Cells with a Novel Aggregation‐Induced Emission Molecule as Hole‐Transport Material
Authors
Keywordsaggregation-induced emission
hole transport materials
inverted structure
perovskite solar cells
Issue Date2019
PublisherWiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2367-198X
Citation
Solar RRL, 2019, p. article no. 1900189, Epub How to Cite?
AbstractOrganic hole‐transport materials (HTMs) are very promising for perovskite solar cells (PSCs) because the molecule structure is engineered via facile chemical routes. Herein, an aggregation‐induced emission (AIE) molecule, 2‐(2,7‐bis(4‐(bis(4‐methoxyphenyl)amino)phenyl)‐9H‐fluoren‐9‐ylidene)malononitrile (TFM), is successfully employed for the first time as a HTM in an inverted planar PSC, obtaining a promising device performance superior to that of the control device with poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) HTM. An optimal power conversion efficiency (PCE) of 16.03% is obtained for the TFM‐based PSCs with a Jsc of 22.68 mA cm−2, Voc of 0.97 V and FF of 72.9%, while that of the control PEDOT:PSS‐based device is 14.95%. Steady‐state and time‐resolved photoluminescence results reveal suppressed nonradiative recombination at the TFM/perovskite interface that is attributed to the effective passivation of the uncoordinated Pb at the perovskite surface by the CN− groups of TFM molecules, as confirmed by X‐ray photoelectronic spectroscopy measurements. In addition to the passivation, the hydrophobic character of TFM films also contributes to the improved device stability. The findings demonstrate the potential of AIE molecules in PSCs and also paves a novel way to improve device performance and stability by molecular structure engineering of AIE molecules in the future.
Persistent Identifierhttp://hdl.handle.net/10722/274004
ISSN

 

DC FieldValueLanguage
dc.contributor.authorCao, Y-
dc.contributor.authorChen, W-
dc.contributor.authorSun, H-
dc.contributor.authorWang, D-
dc.contributor.authorChen, P-
dc.contributor.authorDjurisic, AB-
dc.contributor.authorZhu, Y-
dc.contributor.authorTu, B-
dc.contributor.authorGuo, X-
dc.contributor.authorTang, BZ-
dc.contributor.authorHe, Z-
dc.date.accessioned2019-08-18T14:53:07Z-
dc.date.available2019-08-18T14:53:07Z-
dc.date.issued2019-
dc.identifier.citationSolar RRL, 2019, p. article no. 1900189, Epub-
dc.identifier.issn2367-198X-
dc.identifier.urihttp://hdl.handle.net/10722/274004-
dc.description.abstractOrganic hole‐transport materials (HTMs) are very promising for perovskite solar cells (PSCs) because the molecule structure is engineered via facile chemical routes. Herein, an aggregation‐induced emission (AIE) molecule, 2‐(2,7‐bis(4‐(bis(4‐methoxyphenyl)amino)phenyl)‐9H‐fluoren‐9‐ylidene)malononitrile (TFM), is successfully employed for the first time as a HTM in an inverted planar PSC, obtaining a promising device performance superior to that of the control device with poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) HTM. An optimal power conversion efficiency (PCE) of 16.03% is obtained for the TFM‐based PSCs with a Jsc of 22.68 mA cm−2, Voc of 0.97 V and FF of 72.9%, while that of the control PEDOT:PSS‐based device is 14.95%. Steady‐state and time‐resolved photoluminescence results reveal suppressed nonradiative recombination at the TFM/perovskite interface that is attributed to the effective passivation of the uncoordinated Pb at the perovskite surface by the CN− groups of TFM molecules, as confirmed by X‐ray photoelectronic spectroscopy measurements. In addition to the passivation, the hydrophobic character of TFM films also contributes to the improved device stability. The findings demonstrate the potential of AIE molecules in PSCs and also paves a novel way to improve device performance and stability by molecular structure engineering of AIE molecules in the future.-
dc.languageeng-
dc.publisherWiley - V C H Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2367-198X-
dc.relation.ispartofSolar RRL-
dc.rightsThis is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectaggregation-induced emission-
dc.subjecthole transport materials-
dc.subjectinverted structure-
dc.subjectperovskite solar cells-
dc.titleEfficient Perovskite Solar Cells with a Novel Aggregation‐Induced Emission Molecule as Hole‐Transport Material-
dc.typeArticle-
dc.identifier.emailDjurisic, AB: dalek@hku.hk-
dc.identifier.authorityDjurisic, AB=rp00690-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/solr.201900189-
dc.identifier.hkuros301776-
dc.identifier.volume--
dc.identifier.spagearticle no. 1900189-
dc.identifier.epagearticle no. 1900189-
dc.publisher.placeGermany-

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