Title： | Photochemical Shield Enabling Highly Efficient Perovskite Photovoltaics |
Authors： | Run-Jun Jin1, Yan-Hui Lou2, Lei Huang1, Kai-Li Wang1, Chun-Hao Chen1, Jing Chen1, Fan Hu1, and Zhao-Kui Wang1 |
Institutions： | 1Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, China. 2Institute for Energy and Materials Innovations, Soochow University, Suzhou, China. |
Abstract： | Oxygen is difficult to be physically removed. Oxygen will be excited by light to form free radicals which further attack the lattice of perovskite. The stabilization of α-FAPbI3 against δ-FAPbI3 is the key to optimize perovskite solar cells. Herein, the simple molecule, benzaldehyde (BAH) is adopted. The photochemical shield will be established in perovskite layer. Moreover, heterogeneous nucleation induced by BAH enhances the crystallization of α-FAPbI3. Consequently, the stability of device is improved significantly. The target device maintains 95% of original power conversion efficiency after 1500 h under air conditions and light-emitting diode light. The power conversion efficiency increases from 23.21% of pristine device to 24.82% of target device. |
IF： | 32.086 |
Link： | https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202313154 |
Editor: Guo Jia