Ropy foam-like TiO2 film grown by water-based process for electron-conduction layer of perovskite solar cells
| Autor: | Sarmad Fawzi Hamza Alhasan, Farnood Khalilzadeh-Rezaie, Robert E. Peale, Isaiah O. Oladeji |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Annealing (metallurgy) Brookite Band gap Mechanical Engineering Perovskite solar cell Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Chemical engineering Mechanics of Materials Electrical resistivity and conductivity visual_art visual_art.visual_art_medium Transmittance General Materials Science Orthorhombic crystal system 0210 nano-technology Sheet resistance |
| Zdroj: | MRS Advances. 1:3169-3174 |
| ISSN: | 2059-8521 |
| Popis: | Self-assembled TiO 2 foam-like films, were grown by the water based S treaming P rocess for E lectrodeless E lectrochemical D eposition (SPEED). The morphology of the ∼1 µm thick films consists of a tangled ropy structure with individual strands of ∼200 nm diameter and open pores of 0.1 to 3 micron dimensions. Such films are advantageous for proposed perovskite solar cell comprising CH 3 NH 3 PbI 3 absorber with additional inorganic films as contact and conduction layers, all deposited by SPEED. Lateral film resistivity is in the range 20 – 200 kΩ-cm, increasing with growth temperature, while sheet resistance is in the range 2 – 20 x 10 8 Ω/Sq. X-ray diffraction confirms presence of TiO 2 crystals of orthorhombic class (Brookite). UV-vis spectroscopy shows high transmission below the expected 3.2 eV TiO 2 bandgap. Transmittance increases with growth temperature. |
| Databáze: | OpenAIRE |
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