Chang Jianhui, Feng Erming, Li Hengyue, Ding Yang, Long Caoyu, Gao Yuanji, Yang Yingguo, Yi Chenyi, Zheng Zijian, Yang Junliang
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha, 410083, Hunan, People's Republic of China.
Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, People's Republic of China.
Nanomicro Lett. 2023 Jun 29;15(1):164. doi: 10.1007/s40820-023-01138-x.
With the rapid rise in perovskite solar cells (PSCs) performance, it is imperative to develop scalable fabrication techniques to accelerate potential commercialization. However, the power conversion efficiencies (PCEs) of PSCs fabricated via scalable two-step sequential deposition lag far behind the state-of-the-art spin-coated ones. Herein, the additive methylammonium chloride (MACl) is introduced to modulate the crystallization and orientation of a two-step sequential doctor-bladed perovskite film in ambient conditions. MACl can significantly improve perovskite film quality and increase grain size and crystallinity, thus decreasing trap density and suppressing nonradiative recombination. Meanwhile, MACl also promotes the preferred face-up orientation of the (100) plane of perovskite film, which is more conducive to the transport and collection of carriers, thereby significantly improving the fill factor. As a result, a champion PCE of 23.14% and excellent long-term stability are achieved for PSCs based on the structure of ITO/SnO/FAMAPb(IBr)/Spiro-OMeTAD/Ag. The superior PCEs of 21.20% and 17.54% are achieved for 1.03 cm PSC and 10.93 cm mini-module, respectively. These results represent substantial progress in large-scale two-step sequential deposition of high-performance PSCs for practical applications.
随着钙钛矿太阳能电池（PSC）性能的迅速提升，开发可扩展的制造技术以加速其潜在商业化变得势在必行。然而，通过可扩展的两步顺序沉积法制造的PSC的功率转换效率（PCE）远远落后于最先进的旋涂法制造的PSC。在此，引入添加剂甲基氯化铵（MACl）以在环境条件下调节两步顺序刮涂钙钛矿薄膜的结晶和取向。MACl可以显著提高钙钛矿薄膜质量，增加晶粒尺寸和结晶度，从而降低陷阱密度并抑制非辐射复合。同时，MACl还促进钙钛矿薄膜（100）面的择优面朝上取向，这更有利于载流子的传输和收集，从而显著提高填充因子。结果，基于ITO/SnO/FAMAPb（IBr）/Spiro-OMeTAD/Ag结构的PSC实现了23.14%的最佳PCE和出色的长期稳定性。对于1.03平方厘米的PSC和10.93平方厘米的微型模块，分别实现了21.20%和17.54%的优异PCE。这些结果代表了用于实际应用的高性能PSC大规模两步顺序沉积方面的重大进展。
