Structural and compositional characteristics of vacuum deposited methylammonium lead halide perovskite layers in dependence on background pressure and substrate temperature
| Autor: | Hans-Joachim Kleebe, Carolin Wittich, Eric Mankel, Oliver Clemens, K. Lakus-Wollny, Wolfram Jaegermann, Thomas Mayer |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope Metals and Alloys Halide 02 engineering and technology Surfaces and Interfaces Substrate (electronics) Methylammonium lead halide 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Chemical engineering chemistry Physical vapor deposition Materials Chemistry Deposition (phase transition) 0210 nano-technology Layer (electronics) Perovskite (structure) |
| Zdroj: | Thin Solid Films. 650:51-57 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2018.02.004 |
| Popis: | In a physical vapor deposition process for fabrication of perovskite absorber layers it is an important prerequisite for large scale application to understand the reaction steps and the impact of the deposition parameters on the structural and compositional characteristics of vacuum deposited lead halide perovskite layers. In the sequential deposition method, we found a narrow and low lying temperature window for the transformation of a vapor deposited PbCl2 base layer to CH3NH3PbI3 perovskite by reaction with evaporated CH3NH3I. To modify the deposition parameter window, we systematically varied background pressure and substrate temperature and analyzed the resulting composition using X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. The resulting reaction products and byproducts CH3NH3PbI3, CH3NH3PbCl3, PbICl, PbCl2, and PbI2 were identified and the variation of their concentration in dependence of background pressure and substrate temperature is explained by discussion of a set of reaction equations and reaction mechanisms on a thermodynamic basis. |
| Databáze: | OpenAIRE |
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