Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells

Muhammad K. Kashif, Iacopo Benesperi, Rebecca A. Milhuisen, Steffen Meyer, Jack Hellerstedt, David Zee, Noel W. Duffy, Barry Halstead, Michael S. Fuhrer, John Cashion, Yi Bing Cheng, Leone Spiccia, Alexandr N. Simonov, Udo Bach

Research output: Contribution to journalArticleResearchpeer-review

Abstract

An efficient hole-transporting material (HTM) is indispensable for high-performing perovskite solar cells (PSCs), which have recently emerged as a breakthrough photovoltaic technology. Here, we demonstrate the capacity of the transition metal complex (6,6′-bis(1,1-di(pyridin-2-yl)ethyl)-2,2′-bipyridine)-iron(II/III) trifluoromethanesulfonate ([Fe(bpyPY4)](OTf)2+x) to act as an additive-free, solution-processable HTM in PSCs based on the formamidinium lead bromide absorber. State-of-the-art physical methods have been employed to characterize [Fe(bpyPY4)](OTf)2+x and, in particular, to demonstrate its significantly higher conductivity compared to that of the conventional HTM spiro-OMeTAD. A maximum power conversion efficiency of 2.2% was obtained for a device employing [Fe(bpyPY4)](OTf)2+x, which is the first evidence of the applicability as a HTM in a PSC of a solid material in which conductivity is provided by a redox transformation of a transition metal.

Original languageEnglish
Pages (from-to)1855-1859
Number of pages5
JournalACS Energy Letters
Volume2
Issue number8
DOIs
Publication statusPublished - 11 Aug 2017

Cite this

Kashif, Muhammad K. ; Benesperi, Iacopo ; Milhuisen, Rebecca A. ; Meyer, Steffen ; Hellerstedt, Jack ; Zee, David ; Duffy, Noel W. ; Halstead, Barry ; Fuhrer, Michael S. ; Cashion, John ; Cheng, Yi Bing ; Spiccia, Leone ; Simonov, Alexandr N. ; Bach, Udo. / Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells. In: ACS Energy Letters. 2017 ; Vol. 2, No. 8. pp. 1855-1859.
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abstract = "An efficient hole-transporting material (HTM) is indispensable for high-performing perovskite solar cells (PSCs), which have recently emerged as a breakthrough photovoltaic technology. Here, we demonstrate the capacity of the transition metal complex (6,6′-bis(1,1-di(pyridin-2-yl)ethyl)-2,2′-bipyridine)-iron(II/III) trifluoromethanesulfonate ([Fe(bpyPY4)](OTf)2+x) to act as an additive-free, solution-processable HTM in PSCs based on the formamidinium lead bromide absorber. State-of-the-art physical methods have been employed to characterize [Fe(bpyPY4)](OTf)2+x and, in particular, to demonstrate its significantly higher conductivity compared to that of the conventional HTM spiro-OMeTAD. A maximum power conversion efficiency of 2.2{\%} was obtained for a device employing [Fe(bpyPY4)](OTf)2+x, which is the first evidence of the applicability as a HTM in a PSC of a solid material in which conductivity is provided by a redox transformation of a transition metal.",
author = "Kashif, {Muhammad K.} and Iacopo Benesperi and Milhuisen, {Rebecca A.} and Steffen Meyer and Jack Hellerstedt and David Zee and Duffy, {Noel W.} and Barry Halstead and Fuhrer, {Michael S.} and John Cashion and Cheng, {Yi Bing} and Leone Spiccia and Simonov, {Alexandr N.} and Udo Bach",
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Kashif, MK, Benesperi, I, Milhuisen, RA, Meyer, S, Hellerstedt, J, Zee, D, Duffy, NW, Halstead, B, Fuhrer, MS, Cashion, J, Cheng, YB, Spiccia, L, Simonov, AN & Bach, U 2017, 'Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells' ACS Energy Letters, vol. 2, no. 8, pp. 1855-1859. https://doi.org/10.1021/acsenergylett.7b00522

Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells. / Kashif, Muhammad K.; Benesperi, Iacopo; Milhuisen, Rebecca A.; Meyer, Steffen; Hellerstedt, Jack; Zee, David; Duffy, Noel W.; Halstead, Barry; Fuhrer, Michael S.; Cashion, John; Cheng, Yi Bing; Spiccia, Leone; Simonov, Alexandr N.; Bach, Udo.

In: ACS Energy Letters, Vol. 2, No. 8, 11.08.2017, p. 1855-1859.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cells

AU - Kashif, Muhammad K.

AU - Benesperi, Iacopo

AU - Milhuisen, Rebecca A.

AU - Meyer, Steffen

AU - Hellerstedt, Jack

AU - Zee, David

AU - Duffy, Noel W.

AU - Halstead, Barry

AU - Fuhrer, Michael S.

AU - Cashion, John

AU - Cheng, Yi Bing

AU - Spiccia, Leone

AU - Simonov, Alexandr N.

AU - Bach, Udo

PY - 2017/8/11

Y1 - 2017/8/11

N2 - An efficient hole-transporting material (HTM) is indispensable for high-performing perovskite solar cells (PSCs), which have recently emerged as a breakthrough photovoltaic technology. Here, we demonstrate the capacity of the transition metal complex (6,6′-bis(1,1-di(pyridin-2-yl)ethyl)-2,2′-bipyridine)-iron(II/III) trifluoromethanesulfonate ([Fe(bpyPY4)](OTf)2+x) to act as an additive-free, solution-processable HTM in PSCs based on the formamidinium lead bromide absorber. State-of-the-art physical methods have been employed to characterize [Fe(bpyPY4)](OTf)2+x and, in particular, to demonstrate its significantly higher conductivity compared to that of the conventional HTM spiro-OMeTAD. A maximum power conversion efficiency of 2.2% was obtained for a device employing [Fe(bpyPY4)](OTf)2+x, which is the first evidence of the applicability as a HTM in a PSC of a solid material in which conductivity is provided by a redox transformation of a transition metal.

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U2 - 10.1021/acsenergylett.7b00522

DO - 10.1021/acsenergylett.7b00522

M3 - Article

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JO - ACS Energy Letters

JF - ACS Energy Letters

SN - 2380-8195

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