The effect of thiophene substituents of fulleropyrrolidine acceptors on the performance of inverted organic solar cells

K.M. Kaunisto (Corresponding Author), N.K. Subbaiyan, C. Bikram, V.I. Chukharev, H.M. Hakola, Tommi Vuorinen, V.M. Manninen, N.V. Tkachenko, H.J. Lemmetyinen, F. D'Souza (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

A series of tailored fulleropyrrolidine derivatives with thiophene substituents was synthesized and studied as electron acceptor materials in inverted organic bulk heterojunction (BHJ) solar cells. The study concentrated on seeking correlation between the molecular structure of the acceptor and its capability to form a photovoltaic BHJ film with the used electron donor material poly(3-hexylthiophene), P3HT. Atomic force and scanning electron microscopy imaging showed that the sensitivity of the BHJ morphology is tied to the molecular structure of the acceptor, which was further studied by photovoltaic characterization of the model solar cells. The photovoltaic performance clearly depended on the molecular structure of the fulleropyrrolidine substituents although there was only slight difference in the BHJ surface morphology. Fulleropyrrolidine derivatives with one or two thiophene units performed better as acceptor materials than those with three or four thiophene units. Additionally, hexyl side chains attached to the four thiophene unit increased the compatibility of a fulleropyrrolidine derivative with P3HT compared to a similar derivative without of the hexyl groups. The results provide new knowledge of the effect of the molecular structure of fulleropyrrolidine derivatives on the BHJ morphology in organic photovoltaics.
Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalSynthetic Metals
Volume195
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • organic photovoltaics
  • solar cells
  • bulk heterojunction
  • electron acceptors
  • fullerene
  • film morphology
  • polymers
  • solar energy

Fingerprint Dive into the research topics of 'The effect of thiophene substituents of fulleropyrrolidine acceptors on the performance of inverted organic solar cells'. Together they form a unique fingerprint.

  • Cite this

    Kaunisto, K. M., Subbaiyan, N. K., Bikram, C., Chukharev, V. I., Hakola, H. M., Vuorinen, T., Manninen, V. M., Tkachenko, N. V., Lemmetyinen, H. J., & D'Souza, F. (2014). The effect of thiophene substituents of fulleropyrrolidine acceptors on the performance of inverted organic solar cells. Synthetic Metals, 195, 193-200. https://doi.org/10.1016/j.synthmet.2014.06.007