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Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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Exploring cyclometalated Ir complexes as donor materials for organic solar cells.

Tyler B Fleetham1, Zixing Wang, Jian Li

  • 1Material Science and Engineering, Arizona State University, Tempe, Arizona 85287, USA.

Inorganic Chemistry
|June 18, 2013
PubMed
Summary

Researchers developed a novel iridium complex for organic photovoltaics, achieving 2.8% power conversion efficiency. This advancement addresses key limitations in small molecular organic solar cells, paving the way for improved performance.

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Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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