Details

Autor(en) / Beteiligte

• Piliego, Claudia
• Manca, Marianna
• Kroon, Renee
• Yarema, Maksym
• Szendrei, Krisztina
• Andersson, Mats R
• Heiss, Wolfgang
• Loi, Maria A

Titel

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

Ist Teil von

• Journal of materials chemistry, 2012-12, Vol.22 (46), p.24411-24416

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. An opportune mixing of PbS nanocrystals and a narrow band gap polymer led to hybrid solar cells with a broad spectral response and an efficiency of ∼3%.