Modification of FA<sub>0.85</sub>MA<sub>0.15</sub>Pb(I<sub>0.85</sub>Br<sub>0.15</sub>)<sub>3</sub> Films by NH<sub>2</sub>-POSS
oleh: Yangyang Zhang, Na Liu, Haipeng Xie, Jia Liu, Pan Yuan, Junhua Wei, Yuan Zhao, Baopeng Yang, Jianhua Zhang, Shitan Wang, Han Huang, Dongmei Niu, Qi Chen, Yongli Gao
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2021-12-01 |
Deskripsi
The surface composition and morphology of FA<sub>0.85</sub>MA<sub>0.15</sub>Pb(I<sub>0.85</sub>Br<sub>0.15</sub>)<sub>3</sub> films fabricated by the spin-coating method with different concentrations of NH<sub>2</sub>-POSS were investigated with atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), angle-resolved X-ray photoelectron spectroscopy (AR-XPS), and Fourier transform infrared spectroscopy (FTIR). It was found that the surface composition of the FA<sub>0.85</sub>MA<sub>0.15</sub>Pb(I<sub>0.85</sub>Br<sub>0.15</sub>)<sub>3</sub> films was changed regularly through the interaction between NH<sub>2</sub>-POSS and the perovskite film. The corresponding surface morphological changes were also observed. When the concentration of NH<sub>2</sub>-POSS exceeded 10 mg/mL, a lot of cracks on the surface of the perovskite film were observed and the surface morphology was damaged. The surface composition and its distribution can be adjusted by changing the concentration of NH<sub>2</sub>-POSS and the proper concentration of NH<sub>2</sub>-POSS can substantially improve the quality of perovskite film.