A Strategy to Produce High Efficiency, High Stability Perovskite Solar Cells Using Functionalized Ionic Liquid-Dopants.
basic_science · Level V
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- Record sourced from PubMed, PMID 28741706.
- Also identified by DOI 10.1002/adma.201702157.
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Abstract
Functionalized imidazolium iodide salts (ionic liquids) modified with CH<sub>2</sub> CHCH<sub>2</sub> , CH<sub>2</sub> CCH, or CH<sub>2</sub> CN groups are applied as dopants in the synthesis of CH<sub>3</sub> NH<sub>3</sub> PbI<sub>3</sub> -type perovskites together with a fumigation step. Notably, a solar cell device prepared from the perovskite film doped with the salt containing the CH<sub>2</sub> CHCH<sub>2</sub> side-chain has a power conversion efficiency of 19.21%, which is the highest efficiency reported for perovskite solar cells involving a fumigation step. However, doping with the imidazolium salts with the CH<sub>2</sub> CCH and CH<sub>2</sub> CN groups result in perovskite layers that lead to solar cell devices with similar or lower power conversion efficiencies than the dopant-free cell.