Abstract
Dye-sensitized solar cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1-x Gax Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for solar energy, typical dye-sensitized solar cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI 3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state dye-sensitized solar cells consist of CsSnI 2.95 F 0.05 doped with SnF 2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI 3 enhances visible light absorption on the red side of the spectrum to outperform the typical dye-sensitized solar cells in this spectral region.
| Original language | English |
|---|---|
| Pages (from-to) | 486-489 |
| Number of pages | 4 |
| Journal | Nature |
| Volume | 485 |
| Issue number | 7399 |
| DOIs | |
| Publication status | Published - May 24 2012 |
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Cite this
All-solid-state dye-sensitized solar cells with high efficiency. / Chung, In; Lee, Byunghong; He, Jiaqing; Chang, Robert P. H.; Kanatzidis, Mercouri G.
In: Nature, Vol. 485, No. 7399, 24.05.2012, p. 486-489.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - All-solid-state dye-sensitized solar cells with high efficiency
AU - Chung, In
AU - Lee, Byunghong
AU - He, Jiaqing
AU - Chang, Robert P. H.
AU - Kanatzidis, Mercouri G
PY - 2012/5/24
Y1 - 2012/5/24
N2 - Dye-sensitized solar cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1-x Gax Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for solar energy, typical dye-sensitized solar cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI 3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state dye-sensitized solar cells consist of CsSnI 2.95 F 0.05 doped with SnF 2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI 3 enhances visible light absorption on the red side of the spectrum to outperform the typical dye-sensitized solar cells in this spectral region.
AB - Dye-sensitized solar cells based on titanium dioxide (TiO2) are promising low-cost alternatives to conventional solid-state photovoltaic devices based on materials such as Si, CdTe and CuIn1-x Gax Se2 (refs 1, 2). Despite offering relatively high conversion efficiencies for solar energy, typical dye-sensitized solar cells suffer from durability problems that result from their use of organic liquid electrolytes containing the iodide/tri-iodide redox couple, which causes serious problems such as electrode corrosion and electrolyte leakage. Replacements for iodine-based liquid electrolytes have been extensively studied, but the efficiencies of the resulting devices remain low. Here we show that the solution-processable p-type direct bandgap semiconductor CsSnI 3 can be used for hole conduction in lieu of a liquid electrolyte. The resulting solid-state dye-sensitized solar cells consist of CsSnI 2.95 F 0.05 doped with SnF 2, nanoporous TiO2 and the dye N719, and show conversion efficiencies of up to 10.2 per cent (8.51 per cent with a mask). With a bandgap of 1.3 electronvolts, CsSnI 3 enhances visible light absorption on the red side of the spectrum to outperform the typical dye-sensitized solar cells in this spectral region.
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UR - http://www.scopus.com/inward/citedby.url?scp=84861417492&partnerID=8YFLogxK
U2 - 10.1038/nature11067
DO - 10.1038/nature11067
M3 - Article
VL - 485
SP - 486
EP - 489
JO - Nature
JF - Nature
SN - 0028-0836
IS - 7399
ER -