Engendering Long-Term Air and Light Stability of a TiO2-Supported Porphyrinic Dye via Atomic Layer Deposition
| Autor: | Joseph T. Hupp, Michael J. Pellin, William L. Hoffeditz, Omar K. Farha, Ho-Jin Son |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
02 engineering and technology Quartz crystal microbalance engineering.material Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Porphyrin 0104 chemical sciences chemistry.chemical_compound Atomic layer deposition Adsorption Coating chemistry engineering Photocatalysis General Materials Science 0210 nano-technology Layer (electronics) |
| Zdroj: | ACS Applied Materials & Interfaces. 8:34863-34869 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b10844 |
| Popis: | Organic and porphyrin-based chromophores are prevalent in liquid-junction photovoltaic and photocatalytic solar-cell chemistry; however, their long-term air and light instability may limit their practicality in real world technologies. Here, we describe the protection of a zinc porphyrin dye, adsorbed on nanoparticulate TiO2, from air and light degradation by a protective coating of alumina grown with a previously developed post-treatment atomic layer deposition (ALD) technique. The protective Al2O3 ALD layer is deposited using dimethylaluminum isopropoxide as an Al source; in contrast to the ubiquitous ALD precursor trimethylaluminum, dimethylaluminum isopropoxide does not degrade the zinc porphyrin dye, as confirmed by UV–vis measurements. The growth of this protective ALD layer around the dye can be monitored by an in-reactor quartz crystal microbalance (QCM). Furthermore, greater than 80% of porphyrin light absorption is retained over ∼1 month of exposure to air and light when the protective coating i... |
| Databáze: | OpenAIRE |
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