Figure 2
From: Spiro-Phenylpyrazole/Fluorene as Hole-Transporting Material for Perovskite Solar Cells
UV-vis absorption spectra of four HTMs measured in solutions (solid line) and thin films (dash line).
Figure 2 | Scientific Reports
From: Spiro-Phenylpyrazole/Fluorene as Hole-Transporting Material for Perovskite Solar Cells
UV-vis absorption spectra of four HTMs measured in solutions (solid line) and thin films (dash line).
