Lee Jung Hwan, Shin Dongguen, Rhee Ryan, Yun Sangeun, Yeom Kyung Mun, Chun Do Hyung, Lee Sunje, Kim Dongho, Yi Yeonjin, Noh Jun Hong, Park Jong Hyeok
Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonseiro , Seodaemun-gu, Seoul 03722 , Republic of Korea.
Institute of Physics and Applied Physics , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Republic of Korea.
J Phys Chem Lett. 2019 Nov 7;10(21):6545-6550. doi: 10.1021/acs.jpclett.9b02488. Epub 2019 Oct 14.
Managing defects in SnO is critical for improving the power conversion efficiency (PCE) of halide perovskite-based solar cells. However, typically reported SnObased perovskite solar cells have inherent defects in the SnO layer, which lead to a lower PCE and hysteresis. Here, we report that a dual-coating approach for SnO with different annealing temperatures can simultaneously form a SnO layer with high crystallinity and uniform surface coverage. Along with these enhanced physical properties, the dual-coated SnO layer shows favorable band alignment with a mixed halide perovskite. After careful optimization of the dual-coating method, the average PCE of the perovskite solar cell based on the dual-coated SnO layer increases from 18.07 to 19.23% with a best-performing cell of 20.03%. Note that a facile two-step coating and annealing method can open new avenues to develop SnO-based perovskite solar cells with stabilized and improved photovoltaic performances.
控制氧化锡中的缺陷对于提高卤化物钙钛矿基太阳能电池的功率转换效率（PCE）至关重要。然而，典型报道的基于氧化锡的钙钛矿太阳能电池在氧化锡层中存在固有缺陷，这导致较低的功率转换效率和滞后现象。在此，我们报道一种针对氧化锡的双涂层方法，通过不同的退火温度可同时形成具有高结晶度和均匀表面覆盖率的氧化锡层。伴随着这些增强的物理性能，双涂层氧化锡层与混合卤化物钙钛矿呈现出良好的能带排列。经过对双涂层方法的仔细优化，基于双涂层氧化锡层的钙钛矿太阳能电池的平均功率转换效率从18.07%提高到19.23%，最佳性能的电池达到20.03%。请注意，一种简便的两步涂层和退火方法可为开发具有稳定且改善的光伏性能的基于氧化锡的钙钛矿太阳能电池开辟新途径。
