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

doi:10.1039/c3cp52363b

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

Northwestern University

Research output: Contribution to journal › Article › peer-review

73 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 language	English
Pages (from-to)	16456-16462
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	39
DOIs	https://doi.org/10.1039/c3cp52363b
Publication status	Published - Oct 21 2013

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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Guerrero, A., Loser, S., Garcia-Belmonte, G., Bruns, C. J., Smith, J., Miyauchi, H., Stupp, S. I., Bisquert, J., & Marks, T. J. (2013). Solution-processed small molecule:fullerene bulk-heterojunction solar cells: Impedance spectroscopy deduced bulk and interfacial limits to fill-factors. Physical Chemistry Chemical Physics, 15(39), 16456-16462. https://doi.org/10.1039/c3cp52363b

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 journal › Article › peer-review

Guerrero, A, Loser, S, Garcia-Belmonte, G, Bruns, CJ, Smith, J, Miyauchi, H, Stupp, SI, Bisquert, J & Marks, TJ 2013, 'Solution-processed small molecule:fullerene bulk-heterojunction solar cells: Impedance spectroscopy deduced bulk and interfacial limits to fill-factors', Physical Chemistry Chemical Physics, vol. 15, no. 39, pp. 16456-16462. https://doi.org/10.1039/c3cp52363b

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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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.",

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

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