Solution-processed small molecule: fullerene bulk-heterojunction solar cells: Impedance spectroscopy deduced bulk and interfacial limits to fill-factors

Antonio Guerrero, Stephen Loser, Germà Garcia-Belmonte, Carson J. Bruns, Jeremy Smith, Hiroyuki Miyauchi, Samuel I Stupp, Juan Bisquert, Tobin J Marks

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Using impedance spectroscopy, we demonstrate that the low fill factor (FF) typically observed in small molecule solar cells is due to hindered carrier transport through the active layer and hindered charge transfer through the anode interfacial layer (IFL). By carefully tuning the active layer thickness and anode IFL in BDT(TDPP)2 solar cells, the FF is increased from 33 to 55% and the PCE from 1.9 to 3.8%. These results underscore the importance of simultaneously optimizing active layer thickness and IFL in small molecule solar cells.

Original languageEnglish
Pages (from-to)16456-16462
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number39
DOIs
Publication statusPublished - Oct 21 2013

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Fullerenes
fullerenes
Heterojunctions
heterojunctions
Solar cells
solar cells
Spectroscopy
impedance
Molecules
Anodes
spectroscopy
molecules
Carrier transport
Charge transfer
anodes
Tuning
tuning
charge transfer

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Solution-processed small molecule : fullerene bulk-heterojunction solar cells: Impedance spectroscopy deduced bulk and interfacial limits to fill-factors. / Guerrero, Antonio; Loser, Stephen; Garcia-Belmonte, Germà; Bruns, Carson J.; Smith, Jeremy; Miyauchi, Hiroyuki; Stupp, Samuel I; Bisquert, Juan; Marks, Tobin J.

In: Physical Chemistry Chemical Physics, Vol. 15, No. 39, 21.10.2013, p. 16456-16462.

Research output: Contribution to journalArticle

Guerrero, Antonio ; Loser, Stephen ; Garcia-Belmonte, Germà ; Bruns, Carson J. ; Smith, Jeremy ; Miyauchi, Hiroyuki ; Stupp, Samuel I ; Bisquert, Juan ; Marks, Tobin J. / Solution-processed small molecule : fullerene bulk-heterojunction solar cells: Impedance spectroscopy deduced bulk and interfacial limits to fill-factors. In: Physical Chemistry Chemical Physics. 2013 ; Vol. 15, No. 39. pp. 16456-16462.
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