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Hexamethylphosphoramide-Assisted Structure and Morphology Regulation of a PbI2 Film for Air-Processed Efficient Perovskite Solar Cells via a Two-Step Deposition Method
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-05-11 , DOI: 10.1021/acssuschemeng.2c07526 Gangyi Zeng 1 , Guangyao Liu 1 , Xin Li 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-05-11 , DOI: 10.1021/acssuschemeng.2c07526 Gangyi Zeng 1 , Guangyao Liu 1 , Xin Li 1
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The two-step deposited method with the advantages of high reproducibility and controllability is widely used in fabricating highly efficient perovskite solar cells (PSCs). However, it is still a challenge to fabricate air-processed PSCs through this method due to the existing techniques with glove box circumstance that are not well extended to the ambient air-condition fabrication process. Here, hexamethylphosphoramide (HMPA) used as a solvent additive is incorporated into the first-step PbI2 precursor solution, which can effectively modify the morphology and crystallinity of the PbI2 layer, thereby creating more opportunities for the infiltration of the second-step organic salt. This two-step coating leads to the full conversion from PbI2 to the perovskite crystal and large grains, reduced defects, and enhanced uniformity for the final perovskite film. Consequently, a champion efficiency of 20.84% of the HMPA-based device fabricated using this procedure is achieved. The HMPA-based device shows long-term stability of the remaining 85.7% of the initial efficiency after 1000 h of storage in an ambient air environment. This method demonstrates the great potential toward air-processed efficient PSCs.
中文翻译：
六甲基磷酰胺通过两步沉积法辅助空气处理高效钙钛矿太阳能电池 PbI2 薄膜的结构和形态调控
具有高再现性和可控性优点的两步沉积方法被广泛用于制造高效钙钛矿太阳能电池（PSC）。然而，由于现有的手套箱环境技术未能很好地扩展到环境空调制造工艺，因此通过这种方法制造空气处理 PSC 仍然是一个挑战。在这里，将用作溶剂添加剂的六甲基磷酰胺（HMPA）掺入第一步PbI 2前体溶液中，可以有效地改变PbI 2层的形貌和结晶度，从而为第二步有机物的渗透创造更多机会盐。这种两步涂层导致 PbI 2的完全转化到钙钛矿晶体和大晶粒，减少缺陷，并提高最终钙钛矿薄膜的均匀性。因此，使用此程序制造的基于 HMPA 的设备的冠军效率达到了 20.84%。基于 HMPA 的设备在环境空气环境中存储 1000 小时后显示出初始效率剩余 85.7% 的长期稳定性。这种方法展示了空气处理高效 PSC 的巨大潜力。
更新日期：2023-05-11
中文翻译：
六甲基磷酰胺通过两步沉积法辅助空气处理高效钙钛矿太阳能电池 PbI2 薄膜的结构和形态调控
具有高再现性和可控性优点的两步沉积方法被广泛用于制造高效钙钛矿太阳能电池（PSC）。然而，由于现有的手套箱环境技术未能很好地扩展到环境空调制造工艺，因此通过这种方法制造空气处理 PSC 仍然是一个挑战。在这里，将用作溶剂添加剂的六甲基磷酰胺（HMPA）掺入第一步PbI 2前体溶液中，可以有效地改变PbI 2层的形貌和结晶度，从而为第二步有机物的渗透创造更多机会盐。这种两步涂层导致 PbI 2的完全转化到钙钛矿晶体和大晶粒，减少缺陷，并提高最终钙钛矿薄膜的均匀性。因此，使用此程序制造的基于 HMPA 的设备的冠军效率达到了 20.84%。基于 HMPA 的设备在环境空气环境中存储 1000 小时后显示出初始效率剩余 85.7% 的长期稳定性。这种方法展示了空气处理高效 PSC 的巨大潜力。
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