High efficiency co-sensitized solar cell based on luminescent lanthanide complexes with pyridine-2,6-dicarboxylic acid ligands

Xin Wang, Yu Lin Yang, Ping Wang, Liang Li, Rui Qing Fan, Wen Wu Cao, Bin Yang, Hui Wang, Jing Yao Liu

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Two lanthanide complexes, Ln(HPDA) 3·4EtOH (Ln = Tb, Dy) (H 2PDA = pyridine-2,6-dicarboxylic acid, EtOH = ethanol), have been successfully synthesized using hydrothermal or solvothermal methods, and their crystal structures were analyzed by single crystal XRD. Both crystals have orthorhombic symmetry with space group Pbcn, exhibiting three-dimensional (3D) supramolecular architecture through hydrogen bonding interactions. The metal center was coordinated to nine atoms by three pyridine-2,6-dicarboxylic acid ligands. The nine-coordinated lanthanide metal complexes were assembled onto a nanocrystalline TiO 2 film to form co-sensitized photoelectrodes with N719 for dye-sensitized solar cells, and their photoelectrochemical performance was studied. In the tandem structure of composite electrodes, the energy levels of lanthanide metal complexes are reorganized in their single-crystal form, as verified by ab initio calculations. The co-sensitized systems are far superior for electron-injection and hole-recovery compared with single N719-sensitized systems. Luminescence properties were measured and electrochemical analysis was also performed on these complexes.

Original languageEnglish (US)
Pages (from-to)10619-10625
Number of pages7
JournalDalton Transactions
Volume41
Issue number35
DOIs
StatePublished - Sep 21 2012

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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