The impact of electrostatic interactions on ultrafast charge transfer at Ag 29 nanoclusters–fullerene and CdTe quantum dots–fullerene interfaces

Handle URI:
http://hdl.handle.net/10754/621600
Title:
The impact of electrostatic interactions on ultrafast charge transfer at Ag 29 nanoclusters–fullerene and CdTe quantum dots–fullerene interfaces
Authors:
Ahmed, Ghada H.; Parida, Manas R.; Tosato, Alberto; AbdulHalim, Lina G. ( 0000-0003-0818-234X ) ; Usman, Anwar; Alsulami, Qana ( 0000-0001-5481-5414 ) ; Banavoth, Murali ( 0000-0002-7806-2274 ) ; Alarousu, Erkki; Bakr, Osman M. ( 0000-0002-3428-1002 ) ; Mohammed, Omar F. ( 0000-0001-8500-1130 )
Abstract:
A profound understanding of charge transfer (CT) at semiconductor quantum dots (QDs) and nanoclusters (NCs) interfaces is extremely important to optimize the energy conversion efficiency in QDs and NCs-based solar cell devices. Here, we report on the ground- and excited-state interactions at the interface of two different bimolecular non-covalent donor-acceptor (D-A) systems using steady-state and femtosecond transient absorption (fs-TA) spectroscopy with broadband capabilities. We systematically investigate the electrostatic interactions between the positively charged fullerene derivative C60-(N,N dimethylpyrrolidinium iodide) (CF) employed as an efficient molecular acceptor and two different donor molecules: Ag29 nanoclusters (NCs) and CdTe quantum dots (QDs). For comparison purposes, we also monitor the interaction of each donor molecule with the neutral fullerene derivative C60-(malonic acid)n, which has minimal electrostatic interactions. Our steady-state and time-resolved data demonstrate that both QDs and NCs have strong interfacial electrostatic interactions and dramatic fluorescence quenching when the CF derivative is present. In other words, our results reveal that only CF can be in close molecular proximity with the QDs and NCs, allowing ultrafast photoinduced CT to occur. It turned out that the intermolecular distances, electronic coupling and subsequently CT from the excited QDs or NCs to fullerene derivatives can be controlled by the interfacial electrostatic interactions. Our findings highlight some of the key variable components for optimizing CT at QDs and NCs interfaces, which can also be applied to other D-A systems that rely on interfacial CT. © The Royal Society of Chemistry 2016.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Ahmed GH, Parida MR, Tosato A, AbdulHalim LG, Usman A, et al. (2016) The impact of electrostatic interactions on ultrafast charge transfer at Ag 29 nanoclusters–fullerene and CdTe quantum dots–fullerene interfaces . J Mater Chem C 4: 2894–2900. Available: http://dx.doi.org/10.1039/c5tc02927a.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. C
Issue Date:
9-Nov-2015
DOI:
10.1039/c5tc02927a
Type:
Article
ISSN:
2050-7526; 2050-7534
Sponsors:
This work was supported by King Abdullah University of Science and Technology (KAUST) and the Islamic Development Bank (IDB).
Additional Links:
http://pubs.rsc.org/en/content/articlehtml/2015/tc/c5tc02927a
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAhmed, Ghada H.en
dc.contributor.authorParida, Manas R.en
dc.contributor.authorTosato, Albertoen
dc.contributor.authorAbdulHalim, Lina G.en
dc.contributor.authorUsman, Anwaren
dc.contributor.authorAlsulami, Qanaen
dc.contributor.authorBanavoth, Muralien
dc.contributor.authorAlarousu, Erkkien
dc.contributor.authorBakr, Osman M.en
dc.contributor.authorMohammed, Omar F.en
dc.date.accessioned2016-11-03T08:33:02Z-
dc.date.available2016-11-03T08:33:02Z-
dc.date.issued2015-11-09en
dc.identifier.citationAhmed GH, Parida MR, Tosato A, AbdulHalim LG, Usman A, et al. (2016) The impact of electrostatic interactions on ultrafast charge transfer at Ag 29 nanoclusters–fullerene and CdTe quantum dots–fullerene interfaces . J Mater Chem C 4: 2894–2900. Available: http://dx.doi.org/10.1039/c5tc02927a.en
dc.identifier.issn2050-7526en
dc.identifier.issn2050-7534en
dc.identifier.doi10.1039/c5tc02927aen
dc.identifier.urihttp://hdl.handle.net/10754/621600-
dc.description.abstractA profound understanding of charge transfer (CT) at semiconductor quantum dots (QDs) and nanoclusters (NCs) interfaces is extremely important to optimize the energy conversion efficiency in QDs and NCs-based solar cell devices. Here, we report on the ground- and excited-state interactions at the interface of two different bimolecular non-covalent donor-acceptor (D-A) systems using steady-state and femtosecond transient absorption (fs-TA) spectroscopy with broadband capabilities. We systematically investigate the electrostatic interactions between the positively charged fullerene derivative C60-(N,N dimethylpyrrolidinium iodide) (CF) employed as an efficient molecular acceptor and two different donor molecules: Ag29 nanoclusters (NCs) and CdTe quantum dots (QDs). For comparison purposes, we also monitor the interaction of each donor molecule with the neutral fullerene derivative C60-(malonic acid)n, which has minimal electrostatic interactions. Our steady-state and time-resolved data demonstrate that both QDs and NCs have strong interfacial electrostatic interactions and dramatic fluorescence quenching when the CF derivative is present. In other words, our results reveal that only CF can be in close molecular proximity with the QDs and NCs, allowing ultrafast photoinduced CT to occur. It turned out that the intermolecular distances, electronic coupling and subsequently CT from the excited QDs or NCs to fullerene derivatives can be controlled by the interfacial electrostatic interactions. Our findings highlight some of the key variable components for optimizing CT at QDs and NCs interfaces, which can also be applied to other D-A systems that rely on interfacial CT. © The Royal Society of Chemistry 2016.en
dc.description.sponsorshipThis work was supported by King Abdullah University of Science and Technology (KAUST) and the Islamic Development Bank (IDB).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/content/articlehtml/2015/tc/c5tc02927aen
dc.titleThe impact of electrostatic interactions on ultrafast charge transfer at Ag 29 nanoclusters–fullerene and CdTe quantum dots–fullerene interfacesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalJ. Mater. Chem. Cen
kaust.authorAhmed, Ghada H.en
kaust.authorParida, Manas R.en
kaust.authorTosato, Albertoen
kaust.authorAbdulHalim, Lina G.en
kaust.authorUsman, Anwaren
kaust.authorAlsulami, Qanaen
kaust.authorBanavoth, Muralien
kaust.authorAlarousu, Erkkien
kaust.authorBakr, Osman M.en
kaust.authorMohammed, Omar F.en
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