Solvent-Assisted Preparation of High-Performance Mesoporous CH₃NH₃Pbl₃ Perovskite Solar Cells

• Published in: Journal of nanoscience and nanotechnology Vol. 16; no. 1; p. 844
• Main Authors: Li, Zhi-Hua, Liu, Jie, Ma, Jing-Yuan, Jiang, Yan, Ge, Qian-Qing, Ding, Jie, Hu, Jin-Song, Wan, Li-Jun
• Format: Journal Article
• Language: English
• Published: United States 01.01.2016
• Subjects: Calcium Compounds - chemical synthesis; Calcium Compounds - chemistry; Oxides - chemical synthesis; Oxides - chemistry; Porosity; Solar Energy; Titanium - chemistry
• ISSN: 1533-4880
• DOI: 10.1166/jnn.2016.11638

Organometal trihalide perovskite based solar cells have attracted great attention worldwide since their power conversion efficiency (PCE) have risen to over 15% within only 3 years of development. Comparing with other types of perovskite solar cells, mesostructured perovskite solar cells based on CH₃NH₃Pbl₃ as light harvesting material have already demonstrated remarkable advance in performance and reproducibility. Here, we reported a mesoscopic TiO₂/CH₃NH₃Pbl₃ heterojunction solar cell with uniform perovskite thin film prepared via solvent-assisted solution processing method. The best performing device delivered photocurrent density of 20.11 mA cm⁻², open-circuit voltage of 1.02 V, and fill factor of 0.70, leading to a PCE of 14.41%. A small anomalous hysteresis in the J-V curves was observed, where the PCE at forward scan was measured to be 84% of the PCE at reverse scan. Based on a statistical analysis, the perovskite solar cells prepared by the reported method exhibited reproducible and high PCE, indicating its promising application in the fabrication of low-cost and high-efficiency perovskite solar cells.