A Strategy to Produce High Efficiency, High Stability Perovskite Solar Cells Using Functionalized Ionic Liquid‐Dopants

Yi Zhang; Zhaofu Fei; Peng Gao; Yonghui Lee; Farzaneh Fadaei Tirani; Rosario Scopelliti; Yaqing Feng; Paul J. Dyson; Mohammad Khaja Nazeeruddin

doi:10.1002/adma.201702157

journal article·2017-09Open access

A Strategy to Produce High Efficiency, High Stability Perovskite Solar Cells Using Functionalized Ionic Liquid‐Dopants

Yi Zhang, Zhaofu Fei, Peng Gao, Yonghui Lee, Farzaneh Fadaei Tirani, Rosario Scopelliti, Yaqing Feng, Paul J. Dyson, Mohammad Khaja Nazeeruddin

Advanced Materials· Volume 29· Issue 36

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Source abstract

Abstract

Functionalized imidazolium iodide salts (ionic liquids) modified with CH₂CHCH₂, CH₂CCH, or CH₂CN groups are applied as dopants in the synthesis of CH₃NH₃PbI₃‐type perovskites together with a fumigation step. Notably, a solar cell device prepared from the perovskite film doped with the salt containing the CH₂CHCH₂ 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 CH₂CCH and CH₂CN groups result in perovskite layers that lead to solar cell devices with similar or lower power conversion efficiencies than the dopant‐free cell.

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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne CH‐1951 Sion Switzerland

School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) CH‐1015 Lausanne Switzerland

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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