Air-Stable Molecular Semiconducting Iodosalts for Solar Cell Applications: Cs2SnI6 as a Hole Conductor
| Autor: | Mercouri G. Kanatzidis, Constantinos C. Stoumpos, Nanjia Zhou, Chen Yu Yeh, Feng Hao, Tobin J. Marks, Robert P. H. Chang, Christos D. Malliakas, Byunghong Lee |
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| Rok vydání: | 2014 |
| Předmět: |
business.industry
Photovoltaic system Doping Energy conversion efficiency chemistry.chemical_element Nanotechnology General Chemistry Biochemistry Catalysis law.invention Dye-sensitized solar cell Colloid and Surface Chemistry chemistry law Solar cell Optoelectronics business Tin Inert gas Perovskite (structure) |
| Zdroj: | Journal of the American Chemical Society. 136:15379-15385 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | We introduce a new class of molecular iodosalt compounds for application in next-generation solar cells. Unlike tin-based perovskite compounds CsSnI3 and CH3NH3SnI3, which have Sn in the 2+ oxidation state and must be handled in an inert atmosphere when fabricating solar cells, the Sn in the molecular iodosalt compounds is in the 4+ oxidation state, making them stable in air and moisture. As an example, we demonstrate that, using Cs2SnI6 as a hole transporter, we can successfully fabricate in air a solid-state dye-sensitized solar cell (DSSC) with a mesoporous TiO2 film. Doping Cs2SnI6 with additives helps to reduce the internal device resistance, improving cell efficiency. In this way, a Z907 DSSC delivers 4.7% of energy conversion efficiency. By using a more efficient mixture of porphyrin dyes, an efficiency near 8% with photon confinement has been achieved. This represents a significant step toward the realization of low-cost, stable, lead-free, and environmentally benign next-generation solid-state solar cells. |
| Databáze: | OpenAIRE |
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