|
|||||
|
|
Rubidium Fluoride Modified SnO2 for Planar n-i-p Perovskite Solar Cells |
|
| Authors: | Jing Zhuang Peng Mao Yigang Luan Ningli Chen Xiaofei Cao Guosheng Niu Feifei Jia Fuyi Wang Shaokui Cao Jizheng Wang |
| Affiliation: | 1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China
University of Chinese Academy of Sciences, Beijing, 100049 P. R. China;2. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China;3. Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China;4. University of Chinese Academy of Sciences, Beijing, 100049 P. R. China Beijing National Laboratory for Molecular Sciences, National Centre for Mass Spectrometry in Beijing, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China;5. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001 P. R. China |
| Abstract: | Regulating the electron transport layer (ETL) has been an effective way to promote the power conversion efficiency (PCE) of perovskite solar cells (PSCs) as well as suppress their hysteresis. Herein, the SnO2 ETL using a cost-effective modification material rubidium fluoride (RbF) is modified in two methods: 1) adding RbF into SnO2 colloidal dispersion, F and Sn have a strong interaction, confirmed via X-ray photoelectron spectra and density functional theory results, contributing to the improved electron mobility of SnO2; 2) depositing RbF at the SnO2/perovskite interface, Rb+ cations actively escape into the interstitial sites of the perovskite lattice to inhibit ions migration and reduce non-radiative recombination, which dedicates to the improved open-circuit voltage (Voc) for the PSCs with suppressed hysteresis. In addition, double-sided passivated PSCs, RbF on the SnO2 surface, and p-methoxyphenethylammonium iodide on the perovskite surface, produces an outstanding PCE of 23.38% with a Voc of 1.213 V, corresponding to an extremely small Voc deficit of 0.347 V. |
| Keywords: | doping perovskite solar cells rubidium fluoride SnO 2 surface modification |