Li Hengyue, Zuo Chuantian, Angmo Dechan, Weerasinghe Hasitha, Gao Mei, Yang Junliang
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha, 410083, People's Republic of China.
Flexible Electronics Laboratory, CSIRO Manufacturing, Clayton, VIC, 3168, Australia.
Nanomicro Lett. 2022 Mar 25;14(1):79. doi: 10.1007/s40820-022-00815-7.
Perovskite solar cells (PSCs) have attracted tremendous attention as a promising alternative candidate for clean energy generation. Many attempts have been made with various deposition techniques to scale-up manufacturing. Slot-die coating is a robust and facile deposition technique that can be applied in large-area roll-to-roll (R2R) fabrication of thin film solar cells with the advantages of high material utilization, low cost and high throughput. Herein, we demonstrate the encouraging result of PSCs prepared by slot-die coating under ambient environment using a two-step sequential process whereby PbI:CsI is slot-die coated first followed by a subsequent slot-die coating of organic cations containing solution. A porous PbI:CsI film can promote the rapid and complete transformation into perovskite film. The crystallinity and morphology of perovskite films are significantly improved by optimizing nitrogen blowing and controlling substrate temperature. A power conversion efficiency (PCE) of 18.13% is achieved, which is promising for PSCs fabricated by two-step fully slot-die-coated devices. Furthermore, PSCs with a 1 cm area yield a champion PCE of 15.10%. Moreover, a PCE of 13.00% is obtained on a flexible substrate by the roll-to-roll (R2R) coating, which is one of the highest reported cells with all layers except for metal electrode fabricated by R2R process under ambient condition.
钙钛矿太阳能电池（PSCs）作为一种有前景的清洁能源发电替代候选者，已引起了极大关注。人们已经尝试了各种沉积技术来扩大其制造规模。狭缝式涂布是一种强大且简便的沉积技术，可应用于大面积卷对卷（R2R）薄膜太阳能电池制造，具有材料利用率高、成本低和产量高的优点。在此，我们展示了在环境条件下通过两步顺序工艺利用狭缝式涂布制备的PSCs的令人鼓舞的结果，即首先对PbI:CsI进行狭缝式涂布，随后对含有机阳离子的溶液进行狭缝式涂布。多孔的PbI:CsI薄膜可促进其快速且完全地转变为钙钛矿薄膜。通过优化吹气和控制基板温度，钙钛矿薄膜的结晶度和形态得到显著改善。实现了18.13%的功率转换效率（PCE），这对于通过两步全狭缝式涂布器件制造的PSCs来说很有前景。此外，面积为1平方厘米的PSCs的最佳PCE为15.10%。而且，通过卷对卷（R2R）涂布在柔性基板上获得了13.00%的PCE，这是在环境条件下通过R2R工艺制造的除金属电极外所有层的报道中效率最高的电池之一。
