Synthesis of MAPbBr3-iYi (Y=I, Cl
| Autor: | Vega-Fleitas, Erica, Mollar García, Miguel Alfonso|||0000-0003-4315-0407, Marí, B.|||0000-0003-0001-419X |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] Methylammonium lead halide perovskites with different halides (iodide, bromide and chloride) have been synthetized from methylamine, lead nitrate and the corresponding hydroX acid (X = I, Br, Cl) precursors. Subsequently MAPbBr3-iYi (Y= I, Cl; i=0, 1, 2, 3) perovskites were deposited as thin films onto FTO substrates by spin coating or dipping. Thin film perovskites were then characterized by X-Ray Diffraction, elemental analysis and optical spectrometry. Crystallites sizes are between 100-600 nm depending on the synthesis temperature. All synthetized MAPbX3-iYi perovskites crystallized in the same cubic phase irrespective of the X and Y components and a unique phase is observed. Elemental analy- sis shows that in all cases the atomic components meet the expected stoichiometric formulae. The bandgap of thin film MAPbX3-iYi perovskites were inferred from transmittance and reflectance spectral measurements. It is found that the on-set of the absorption edge for thin film MAPbX3 perovskites is about 1.66, 2.55 and 3.37 eV for X= I, Br, Cl, respectively "and it reaches intermediate values for mixed MAPbX3-iYi perovskites. This work was supported by Ministerio de Economía y Competitividad (ENE2013-46624-C4-4-R) |
| Databáze: | OpenAIRE |
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