| Autor: |
Aunping, Namfon, Kumlangwan, Pantiwa, Towannang, Madsakorn, Chanlek, Narong, Kumnorkaew, Pisist, Klangtakai, Pawinee, Srepusharawoot, Pornjuk, Thongnum, Anusit, Chompoosor, Apiwat, Jarernboon, Wirat, Pimanpang, Samuk, Ruttanapun, Chesta, Amornkitbamrung, Vittaya |
| Zdroj: |
Journal of the Korean Physical Society; April 2023, Vol. 82 Issue: 8 p763-775, 13p |
| Abstrakt: |
CH3NH3PbI3(MAPbI3) film was prepared by a convective method, and its X-ray diffraction spectrum displays the tetragonal perovskite structure. GeI2and GeBr2powders dissolve poorly in a mixed dimethylformamide-dimethylsulfoxide (DMF-DMSO) solvent, but the introduction of 5 wt% 5-ammonium valeric acid iodide (5-AVAI) into the mixed DMF-DMSO solvent greatly promotes GeI2and GeBr2solubility. XRD spectra of the (5-AVAI)MAPbI3, MAGexPb1–xI3, and MAGexPb1–xBr2xI3–2x(x= 0.0625 and 0.125) films exhibit a tetragonal perovskite structure, but the film morphologies become rougher than that of the pristine MAPbI3film. Discontinuous islands are formed on MAGexPb1–xI3and MAGexPb1–xBr2xI3–2x(x= 0.125) films. X-ray photoemission spectroscopy (XPS) analysis detected the Ge element on all Ge-doped films. The best performance levels of the carbon-based hole transport layer-free MAGexPb1–xI3–x(x= 0.0625, η= 3.63%) and MAGexPb1–xBr2xI3–2x(x= 0.0625, η= 2.95%) perovskite solar cells are lower than that of the pristine MAPbI3–based perovskite solar cell (η= 5.28%). This is likely due to the increased surface roughness, pin-holes, isolated islands, and the decreased light absorbance of the Ge-doped films in comparison with the pristine MAPbI3film. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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