Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM)

Bryon W. Larson, James B. Whitaker, Xue Bin Wang, Alexey A. Popov, Gary Rumbles, Nikos Kopidakis, Steven H. Strauss, Olga V. Boltalina

Research output: Contribution to journalArticle

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Abstract

The gas-phase electron affinity (EA) of phenyl-C61-butyric acid methyl ester (PCBM), one of the best-performing electron acceptors in organic photovoltaic devices, was measured by low-temperature photoelectron spectroscopy for the first time. The obtained value of 2.63(1) eV is only ca. 0.05 eV lower than that of C60 (2.683(8) eV), compared to a 0.09 V difference in their E1/2 values measured in this work by cyclic voltammetry. Literature E(LUMO) values for PCBM that are typically estimated from cyclic voltammetry and commonly used as a quantitative measure of acceptor properties are dispersed over a wide range between -4.38 and -3.62 eV; the reasons for such a huge discrepancy are analyzed here, and a protocol for reliable and consistent estimations of relative fullerene-based acceptor strength in solution is proposed.

Original languageEnglish
Pages (from-to)14958-14964
Number of pages7
JournalJournal of Physical Chemistry C
Volume117
Issue number29
DOIs
Publication statusPublished - Jul 25 2013

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Electron affinity
Butyric acid
Butyric Acid
butyric acid
electron affinity
Cyclic voltammetry
esters
Esters
Fullerenes
Photoelectron spectroscopy
fullerenes
Gases
photoelectron spectroscopy
vapor phases
Electrons
electrons
Temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Larson, B. W., Whitaker, J. B., Wang, X. B., Popov, A. A., Rumbles, G., Kopidakis, N., ... Boltalina, O. V. (2013). Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM). Journal of Physical Chemistry C, 117(29), 14958-14964. https://doi.org/10.1021/jp403312g

Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM). / Larson, Bryon W.; Whitaker, James B.; Wang, Xue Bin; Popov, Alexey A.; Rumbles, Gary; Kopidakis, Nikos; Strauss, Steven H.; Boltalina, Olga V.

In: Journal of Physical Chemistry C, Vol. 117, No. 29, 25.07.2013, p. 14958-14964.

Research output: Contribution to journalArticle

Larson, BW, Whitaker, JB, Wang, XB, Popov, AA, Rumbles, G, Kopidakis, N, Strauss, SH & Boltalina, OV 2013, 'Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM)', Journal of Physical Chemistry C, vol. 117, no. 29, pp. 14958-14964. https://doi.org/10.1021/jp403312g
Larson BW, Whitaker JB, Wang XB, Popov AA, Rumbles G, Kopidakis N et al. Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM). Journal of Physical Chemistry C. 2013 Jul 25;117(29):14958-14964. https://doi.org/10.1021/jp403312g
Larson, Bryon W. ; Whitaker, James B. ; Wang, Xue Bin ; Popov, Alexey A. ; Rumbles, Gary ; Kopidakis, Nikos ; Strauss, Steven H. ; Boltalina, Olga V. / Electron affinity of Phenyl-C61-butyric acid methyl ester (PCBM). In: Journal of Physical Chemistry C. 2013 ; Vol. 117, No. 29. pp. 14958-14964.
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