Lead-free organic–inorganic tin halide perovskites for photovoltaic applications

Already exhibiting solar to electrical power conversion efficiencies of over 17%, organic–inorganic lead halide perovskite solar cells are one of the most promising emerging contenders in the drive to provide a cheap and clean source of energy. One concern however, is the potential toxicology issue...

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Bibliographic Details
Published in:Energy & environmental science 2014, Vol.7 (9), p.3061-3068
Main Authors: Noel, Nakita K., Stranks, Samuel D., Abate, Antonio, Wehrenfennig, Christian, Guarnera, Simone, Haghighirad, Amir-Abbas, Sadhanala, Aditya, Eperon, Giles E., Pathak, Sandeep K., Johnston, Michael B., Petrozza, Annamaria, Herz, Laura M., Snaith, Henry J.
Format: Article
Language:English
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Summary:Already exhibiting solar to electrical power conversion efficiencies of over 17%, organic–inorganic lead halide perovskite solar cells are one of the most promising emerging contenders in the drive to provide a cheap and clean source of energy. One concern however, is the potential toxicology issue of lead, a key component in the archetypical material. The most likely substitute is tin, which like lead, is also a group 14 metal. While organic–inorganic tin halide perovskites have shown good semiconducting behaviour, the instability of tin in its 2+ oxidation state has thus far proved to be an overwhelming challenge. Here, we report the first completely lead-free, CH 3 NH 3 SnI 3 perovskite solar cell processed on a mesoporous TiO 2 scaffold, reaching efficiencies of over 6% under 1 sun illumination. Remarkably, we achieve open circuit voltages over 0.88 V from a material which has a 1.23 eV band gap.
ISSN:1754-5692
1754-5706
DOI:10.1039/C4EE01076K