Chou Li-Hui, Wang Xiao-Feng, Osaka Itaru, Wu Chun-Guey, Liu Cheng-Liang
Department of Applied Chemistry, Graduate School of Engineering , Hiroshima University , Higashi-Hiroshima , Hiroshima 739-8527 , Japan.
Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , China.
ACS Appl Mater Interfaces. 2018 Nov 7;10(44):38042-38050. doi: 10.1021/acsami.8b12463. Epub 2018 Oct 29.
Organic-inorganic hybrid perovskite solar cells are on the brink of a breakthrough in photovoltaic technology. Scale-up and large-area processing have become the focal points that must be resolved before commercialization. In this study, the scalable ultrasonic spray deposition method for high-throughput coating of the perovskite photoactive layer with a large active area of up to 3 cm is implemented by precisely controlling the concentration of the precursor solution and spray passes. CHNHPbI films with large crystallites and a suitable thickness of ∼350 nm are facilely developed through one-step direct ultrasonic spraying. Less hysteresis and highly reproducible power conversion efficiencies (PCEs) of up to 12.30% (11.43 ± 0.43% on average for 20 devices) are achieved by an optimized single-junction device with an active area of 1 cm, along with good ambient stability. The device retained ∼80 and ∼65% of the initial PCE after 60 and 105 days in ambient, respectively. The ultrasonic spray-coated perovskite solar cells can be further scaled to larger areas of 2 and 3 cm and exhibit PCEs of 10.18 and 7.01%, respectively. The reliable scale-up process for manufacturing the atmospheric wet-coated perovskite film is available in cost-effective and easily operated bench-top variants to bridge the interconnection between applied research and industry.
有机-无机杂化钙钛矿太阳能电池正处于光伏技术突破的边缘。扩大规模和大面积加工已成为商业化之前必须解决的重点问题。在本研究中，通过精确控制前驱体溶液的浓度和喷涂次数，实现了可扩展的超声喷雾沉积方法，用于高通量涂覆活性面积高达3平方厘米的钙钛矿光活性层。通过一步直接超声喷涂，轻松制备出具有大晶粒且厚度约为350纳米的合适厚度的CHNHPbI薄膜。通过优化的有源面积为1平方厘米的单结器件，实现了较小的滞后现象和高达12.30%的高重现性功率转换效率（PCE）（20个器件平均为11.43±0.43%），同时具有良好的环境稳定性。该器件在环境中放置60天和105天后，分别保留了初始PCE的约80%和约65%。超声喷雾涂覆的钙钛矿太阳能电池可进一步扩展到2平方厘米和3平方厘米的更大面积，PCE分别为10.18%和7.01%。制造大气湿涂覆钙钛矿薄膜的可靠放大工艺可通过具有成本效益且易于操作的台式变体获得，以弥合应用研究与工业之间的联系。
