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Precursor Concentration Affects Grain Size, Crystal Orientation, and Local Performance in Mixed-Ion Lead Perovskite Solar Cells
- Source :
- ACS Applied Energy Materials. 1:6801-6808
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- A key debate involving mixed-cation lead mixed-halide perovskite thin-films relates to the effects of process conditions on film morphology and local performance of perovskite solar cells. In this contribution, we investigate the influence of precursor concentration on the film thickness, grain size, and orientation of these polycrystalline thin-films. We vary the molar concentration of the perovskite precursor containing Rb, Cs, MA, FA, Pb, I, and Br from 0.4 to 1.2 M. We use optical and electrical probes to measure local properties and correlate the effect of crystallographic orientation on the inter- and intragrain charge-carrier transport. We find that, with increasing precursor concentration, the grain size of the polycrystalline thin-films becomes larger and more faceted. Films with small grains show mostly random grain orientation angles, whereas films with large grains are oriented with {100} planes around an angle of 20° relative to the surface normal. These films with oriented large grains also ...
- Subjects :
- Morphology (linguistics)
Molar concentration
Materials science
Analytical chemistry
Energy Engineering and Power Technology
02 engineering and technology
Pole figure
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Grain size
0104 chemical sciences
Ion
Materials Chemistry
Electrochemistry
Chemical Engineering (miscellaneous)
Crystallite
Electrical and Electronic Engineering
0210 nano-technology
Science, technology and society
Perovskite (structure)
Subjects
Details
- ISSN :
- 25740962
- Volume :
- 1
- Database :
- OpenAIRE
- Journal :
- ACS Applied Energy Materials
- Accession number :
- edsair.doi...........00dc18f00fb8d9b7b052e6cbbf935b73