Fabrication of UV-Stable Perovskite Solar Cells with Compact Fe<sub>2</sub>O<sub>3</sub> Electron Transport Layer by FeCl<sub>3</sub> Solution and Fe<sub>3</sub>O<sub>4</sub> Nanoparticles
oleh: Bangkai Gu, Yi Du, Song Fang, Xi Chen, Xiabing Li, Qingyu Xu, Hao Lu
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-12-01 |
Deskripsi
Even though Fe<sub>2</sub>O<sub>3</sub> is reported as the electron-transporting layer (ETL) in perovskite solar cells (PSCs), its fabrication and defects limit its performance. Herein, we report a Fe<sub>2</sub>O<sub>3</sub> ETL prepared from FeCl<sub>3</sub> solution with a dopant Fe<sub>3</sub>O<sub>4</sub> nanoparticle modification. It is found that the mixed solution can reduce the defects and enhance the performance of Fe<sub>2</sub>O<sub>3</sub> ETL, contributing to improved electron transfer and suppressed charge recombination. Consequently, the best efficiency is improved by more than 118% for the optimized device. The stability efficiency of the Fe<sub>2</sub>O<sub>3</sub>-ETL-based device is nearly 200% higher than that of the TiO<sub>2</sub>-ETL-based device after 7 days measurement under a 300 W Xe lamp. This work provides a facile method to fabricate environmentally friendly, high-quality Fe<sub>2</sub>O<sub>3</sub> ETL for perovskite photovoltaic devices and provides a guide for defect passivation research.