期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 7, 期 9, 页码 3061-3068出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ee01076k
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资金
- EPSRC
- European Research Council (ERC) HYPER PROJECT [27988]
- Government of the Republic of Trinidad and Tobago
- EPSRC [EP/L024667/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1511477, EP/L024667/1] Funding Source: researchfish
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, CH3NH3SnI3 perovskite solar cell processed on a mesoporous TiO2 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.
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