Efficient Ag-Doped Perovskite Solar Cells Fabricated in Ambient Air

• Published in: Crystals (Basel) Vol. 11; no. 12; p. 1521
• Main Authors: Hao, Jiabin, Wang, Zeming, Hao, Huiying, Wang, Guanlei, Gao, Hongcheng, Wang, Jianyu, Pan, Bing, Qi, Qiang
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.12.2021
• Subjects: 30–40% RH; Ag-doped; Crystal structure; Crystallinity; Efficiency; Energy bands; Energy conversion efficiency; Ethanol; Ethyl acetate; ethyl acetate (EA); Glass substrates; Grain size; Humidity; Moisture; Morphology; Nucleation; perovskite solar cells; Perovskites; Photovoltaic cells; Relative humidity; Silver; Solar cells; Solvents; Spectrum analysis; Spin coating; Thin films; China
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst11121521

So far, it is still a great challenge to prepare high efficiency organic–inorganic perovskite solar cells in ambient air. Specifically, moisture is easily combined with the perovskite material during the spin-coating process, which result in porous perovskite films with poor surface morphology. In this study, we investigated crystalline Ag-doped perovskite films by a one-step spin-coating method in air with 30–40% relative humidity (RH), in which ethyl acetate (EA) was used as antisolvent can absorb moisture in air to reduced nucleation density. More significantly, EA is a feasible and environmentally friendly solvent to replace highly toxic solvent. Moreover, 1.0% Ag-doped device shows a highest power conversion efficiency (PCE) of 14.36%. The improved performance is not only ascribed to the superior CH3NH3PbI3 film with high crystallinity but to the versatile tunability of energy band structure.