09:30 〜 11:30
▲ [18a-PB01-19] Rough surface texture of high haze FTO improves the short circuit current density of Perovskite solar cells
キーワード：Perovskite solar cells, Short circuit current density, FTO
Perovskite solar cells (PSCs) have attracted much attention because of the fast progress of their power conversion efficiency (PCE), from 3.8% to 25.7% in the past decade.[1] To fabricate high-efficiency PSCs, high short circuit current density (Jsc), high open circuit voltage (Voc) and high fill factor (FF) should be achieved at the same time. However, it is found that the development of the Jsc is much more difficult than the Voc and FF in high-performance PSCs. The Jsc of the optimized PSCs usually keeps very similar values compared to the control devices, even though Voc shows great improvement.[2]
We believe that the defect density is low enough in high-efficiency PSCs, which has a minor influence on the Jsc because of the built-in electric field under the short circuit condition. Therefore, it is necessary to improve the Jsc through the consideration of the optical process. The anti-reflection coating is one of the most useful techniques to improve the Jsc of solar cells which can reduce the reflection loss of the Air/glass surface. However, the reflection loss from the fluorine doped tin oxide (FTO)/perovskite interface is also serious in the PSCs, which can not be solved through the anti-reflection coating. Therefore, the selection of suitable FTO glass substrates is very important for the fabrication of high-efficiency PSCs. In this work, we fabricated PSCs using different FTO glass substrates, including low-haze FTO (L-FTO) and high-haze FTO (H-FTO).
We believe that the defect density is low enough in high-efficiency PSCs, which has a minor influence on the Jsc because of the built-in electric field under the short circuit condition. Therefore, it is necessary to improve the Jsc through the consideration of the optical process. The anti-reflection coating is one of the most useful techniques to improve the Jsc of solar cells which can reduce the reflection loss of the Air/glass surface. However, the reflection loss from the fluorine doped tin oxide (FTO)/perovskite interface is also serious in the PSCs, which can not be solved through the anti-reflection coating. Therefore, the selection of suitable FTO glass substrates is very important for the fabrication of high-efficiency PSCs. In this work, we fabricated PSCs using different FTO glass substrates, including low-haze FTO (L-FTO) and high-haze FTO (H-FTO).