Journal
MOLECULES
Volume 26, Issue 24, Pages -Publisher
MDPI
DOI: 10.3390/molecules26247638
Keywords
dye-sensitized solar cells; photosensitizers; thiocyanate-free ruthenium dyes; bipyridine ruthenium complexes
Funding
- National Interuniversity Consortium of Materials Science and Technology [INSTM21MIROBERTO]
- Universita degli Studi di Milano [PSR2019_DIP_005_PI_CDRAG, PSR2020_DIP_005_PI_ACOLO]
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Thiocyanate-free ruthenium(II) complexes have gained increasing interest in DSSCs due to their better stability compared to conventional thiocyanate-based complexes. This mini-review introduces two classes of these ruthenium(II) complexes, focusing on their design strategies and photovoltaic properties.
Three decades ago, dye-sensitized solar cells (DSSCs) emerged as a method for harnessing the energy of the sun and for converting it into electricity. Since then, a lot of work has been devoted to create better global photovoltaic efficiencies and long term stability. Among photosensitizers for DSSCs, thiocyanate-free ruthenium(II) complexes have gained increasing interest due to their better stability compared to conventional thiocyanate-based complexes, such as benchmark dyes N719 and Z907. In this mini-review, two classes of thiocyanate-free Ru(II) complexes are presented: (a) bis-bipyridyl compounds bearing an ancillary cyclometalating bidentate ligand; (b) bipyridyl compounds bearing non-cyclometalating ancillary ligands. The coverage, mainly from 2014 up to now, is not exhaustive, but illustrates the most recent design strategies and photovoltaic properties of these two families of ruthenium(II) dyes.
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