Research / 2020 / Article / Fig 2

Research Article

Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic

Figure 2

Perovskite precursor solution chemistry. (a) The solution images of the MAPbI3 perovskite precursor dissolved in different IL solvents. (b) The solution images of different perovskite precursors (MA-, FA-, and Cs-based perovskites) dissolved in the MAAc solvent. (c) The Pb -edge XANES spectra of the DMF and MAAc perovskite precursors. The -weighted Fourier transforms of the EXAFS spectra at the Pb -edge for the (d) MAAc and (e) DMF perovskite precursors. (f) 1H NMR spectra of a pure MAAc solvent and different perovskite precursors in the MAAc solvent.