期刊
SCIENCE
卷 350, 期 6263, 页码 944-948出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aad1015
关键词
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资金
- Core Research for Evolutional Science and Technology of the Japan Science and Technology Agency
- Swiss Nanotera
- Swiss National Science Foundation [PV2050]
The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction, even with 10- to 20-nanometer-thick layers, avoiding pinholes and eliminating local structural defects over large areas. The robust inorganic nature of the layers allowed for the fabrication of PSCs with an aperture area >1 square centimeter that have a PCE >15%, as certified by an accredited photovoltaic calibration laboratory. Hysteresis in the current-voltage characteristics was eliminated; the PSCs were stable, with >90% of the initial PCE remaining after 1000 hours of light soaking.
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