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Issue 46, 2012
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Charge separation dynamics in a narrow band gap polymer–PbS nanocrystal blend for efficient hybrid solar cells

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Abstract

We have demonstrated efficient hybrid solar cells based on lead sulfide (PbS) nanocrystals and a narrow band gap polymer, poly[{2,5-bis(2-hexyldecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl}-alt-{[2,2′-(1,4-phenylene)bis-thiophene]-5,5′-diyl}], (PDPPTPT). An opportune mixing of the two materials led to the formation of an energetically favorable bulk hetero-junction with a broad spectral response. Using a basic device structure, we reached a power conversion efficiency of ∼3%, which is one of the highest values reported for this class of solar cells. Photo-physical measurements carried out on the device provided insights into the working mechanism: the comparison between the time decay of the pristine polymer and the polymer–PbS blend allows us to conclude that efficient charge transfer is taking place in this hybrid system.

Graphical abstract: Charge separation dynamics in a narrow band gap polymer–PbS nanocrystal blend for efficient hybrid solar cells

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Article information


Submitted
21 Jun 2012
Accepted
10 Aug 2012
First published
13 Aug 2012

J. Mater. Chem., 2012,22, 24411-24416
Article type
Paper

Charge separation dynamics in a narrow band gap polymer–PbS nanocrystal blend for efficient hybrid solar cells

C. Piliego, M. Manca, R. Kroon, M. Yarema, K. Szendrei, M. R. Andersson, W. Heiss and M. A. Loi, J. Mater. Chem., 2012, 22, 24411
DOI: 10.1039/C2JM34034H

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