Efficient Planar Perovskite Solar Cells with Improved Fill Factor via Interface Engineering with Graphene.
basic_science · Level V
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- Record sourced from PubMed, PMID 29539264.
- Also identified by DOI 10.1021/acs.nanolett.8b00025.
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Abstract
Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemically modified graphene into nanocrystal SnO<sub>2</sub> as the electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO<sub>2</sub> with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic-inorganic hybrid lead halide perovskite compounds. As a result, highly efficient perovskite solar cells with power conversion efficiency of 20.2% can be achieved with an improved fill factor of 82%, which could be mainly attributed to the augmented charge extraction and transport.