期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 46, 页码 24411-24416出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm34034h
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资金
- Zernike Institute for Advanced Materials
- FOM Focus Group Groningen
- Austrian Science Fund FWF [IR_ON F2505]
- Austrian Science Fund (FWF) [F 2505] Funding Source: researchfish
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0843934] Funding Source: National Science Foundation
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 similar to 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.
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