Polypyridyl complexes as electron transporting materials for inverted bulk heterojunction solar cells

The metal center effect

Renata Balgley, Martin Drees, Tatyana Bendikov, Michal Lahav, Antonio Facchetti, Milko van der Boom

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The fundamental science behind the design of organic photovoltaic (OPV) cells lies in the formation of energy level gradients for efficient charge separation and collection. Tuning the energy levels at the device electrodes by the right choice of the components is a key requirement for achieving enhanced characteristics. Here we demonstrate control and optimization of OPV cell performance by using a set of polypyridyl complexes based on iron, ruthenium, and osmium centers with tunable frontier orbital energies as interlayers for inverted bulk heterojunction solar cells. We found that changing the metal center of isostructural transition-metal complexes results in evident shifts of the HOMO and LUMO energy levels and the work functions of the corresponding interlayers, which has a prominent effect on the device performance. We generalize our approach by combining the interlayers with different sets of photoactive materials to test the electron transporting as well as the hole blocking characteristics of the interlayers.

Original languageEnglish
Pages (from-to)4634-4639
Number of pages6
JournalJournal of Materials Chemistry C
Volume4
Issue number21
DOIs
Publication statusPublished - 2016

Fingerprint

Electron energy levels
Heterojunctions
Solar cells
Photovoltaic cells
Metals
Electrons
Osmium
Ruthenium
Coordination Complexes
Metal complexes
Transition metals
Iron
Tuning
Electrodes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Polypyridyl complexes as electron transporting materials for inverted bulk heterojunction solar cells : The metal center effect. / Balgley, Renata; Drees, Martin; Bendikov, Tatyana; Lahav, Michal; Facchetti, Antonio; van der Boom, Milko.

In: Journal of Materials Chemistry C, Vol. 4, No. 21, 2016, p. 4634-4639.

Research output: Contribution to journalArticle

Balgley, Renata ; Drees, Martin ; Bendikov, Tatyana ; Lahav, Michal ; Facchetti, Antonio ; van der Boom, Milko. / Polypyridyl complexes as electron transporting materials for inverted bulk heterojunction solar cells : The metal center effect. In: Journal of Materials Chemistry C. 2016 ; Vol. 4, No. 21. pp. 4634-4639.
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