Institutes of Physical Science and Information Technology Anhui University Hefei 230601 Anhui China;
Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 Anhui China;
Institutes of Physical Science and Information Technology Anhui University Hefei 230601 Anhui China;
Institutes of Physical Science and Information Technology Anhui University Hefei 230601 Anhui ChinaKey Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 Anhui China;
Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 Anhui China;
Perovskite solar cells; Poly(vinylidene fluoride); Polymer additive; Hydrophobic barrier; Long-term stability;