Journal
NATURE ENERGY
Volume 2, Issue 2, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/nenergy.2016.194
Keywords
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Funding
- European Union 7th Framework Programme [614897]
- Cariplo Foundation [2013-0656]
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Lead halide perovskite semiconductors have recently gained wide interest following their successful embodiment in solidstate photovoltaic devices with impressive power-conversion efficiencies, while offering a relatively simple and low-cost processability. Although the primary optoelectronic properties of these materials have already met the requirement for high-efficiency optoelectronic technologies, industrial scale-up requires more robust processing methods, as well as solvents that are less toxic than the ones that have been commonly used so successfully on the lab-scale. Here we report a fast, room-temperature synthesis of inks based on CsPbBr3 perovskite nanocrystals using short, low-boiling-point ligands and environmentally friendly solvents. Requiring no lengthy post-synthesis treatments, the inks are directly used to fabricate films of high optoelectronic quality, exhibiting photoluminescence quantum yields higher than 30% and an amplified spontaneous emission threshold as low as 1.5 mu J cm(-2). Finally, we demonstrate the fabrication of perovskite nanocrystal-based solar cells, with open-circuit voltages as high as 1.5V.
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