Synthesis and Characterization of a Ruthenium(II) Complex for Photovoltaic Cells |
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| Authors: | Young‐Gi Kim Ravi Mosurkal Lian Li John Walker Jinan He |
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| Institution: | 1. Departments of Chemistry , University of Massachusetts Lowell , Lowell , MA;2. Center for Advanced Materials, University of Massachusetts Lowell , Lowell , MA;3. Center for Advanced Materials, University of Massachusetts Lowell , Lowell , MA;4. Natick Soldier Center, US Army Soldier and Biological Chemical Command , Natick , MA |
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| Abstract: | We have designed and synthesized a new ruthenium complex, (5‐amino‐1,10‐phenanthroline)bis(4,4′‐dicarboxylic acid‐2,2′‐bipyridine)]ruthenium(II) by introducing two types of ligands, 5‐amino‐1,10‐phenanthroline and 4,4′‐dicarboxylic acid‐2,2′‐bipyridine. We investigated the electronic, spectroscopic, electrochemical, and photovoltaic properties of the Ru(II) complex. The short‐circuit current density and overall solar‐to‐electric energy conversion efficiency of photovoltaic cells made with this Ru(II) complex were found to be 8.9 mA/cm2 and 2.1%, respectively. A series of analogous Ru(II) complexes have also been synthesized and investigated to compare the effects of functional groups on various ligands. HOMO‐LUMO energies and molecular orbital surfaces have been investigated using semiempirical quantum chemical methods. |
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| Keywords: | ruthenium complex TiO2 solar cells photoluminescence |
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