title: High efficiency co-sensitized solar cell based on luminescent lanthanide complexes with pyridine-2,6-dicarboxylic acid ligands.
abstract: Two lanthanide complexes, Ln(HPDA)(3)·4EtOH (Ln = Tb, Dy) (H(2)PDA = 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.
authors: Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, PR China.
authors: Xin
authors: X
authors: Wang
authors: Yu-Lin
authors: YL
authors: Yang
authors: Ping
authors: P
authors: Wang
authors: Liang
authors: L
authors: Li
authors: Rui-Qing
authors: RQ
authors: Fan
authors: Wen-Wu
authors: WW
authors: Cao
authors: Bin
authors: B
authors: Yang
authors: Hui
authors: H
authors: Wang
authors: Jing-Yao
authors: JY
authors: Liu