A one-step laser process for rapid manufacture of mesoscopic perovskite solar cells prepared under high relative humidity
A one-step laser process for rapid manufacture of mesoscopic perovskite solar cells prepared under high relative humidity
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DOI：
10.1039/c8se00043c
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发表时间：
2018-06-01
影响因子：
5.6
通讯作者：
Liu, Zhu
中科院分区：
文献类型：
--
作者：
Chen, Qian;Mokhtar, Muhamad Z.;Liu, Zhu
介观钙钛矿太阳能电池（PSCs）含有TiO2介孔结构和致密的TiO2膜，在各种PSC结构中达到了最高的功率转换效率（PCE）和优异的稳定性。然而，介观结构的常规制造需要相当耗时的高温加热过程。目前的方法还使得难以在同一衬底上制造集成或多功能器件。激光加工提供了一个机会，开发一个快速，局部和精确的治疗，而不损害基板或周围材料。在这里，我们展示了一个快速和本地化的一步光纤激光器的过程中产生的锡掺杂氧化铟（ITO）玻璃上的介孔和紧凑的二氧化钛薄膜。在60%左右的高相对湿度下，采用一步沉积法制备的PSC，激光照射1 min后的PCE平均值与炉处理2 h后的PCE平均值相当。还建立了使用波长为1070 nm的光纤激光器的激光烧结机理的基本理解。使用具有超过40%的壁插效率的光纤激光器为快速制造介观PSC和集成多功能设备的挑战提供了经济可行、工业可行的解决方案。此外，它为未来制造串联，图案化或美观的太阳能电池开辟了一条新的途径。
Mesoscopic perovskite solar cells (PSCs) containing a TiO2 mesoporous structure and a compact TiO2 film have reached the highest power conversion efficiency (PCE) and excellent stability among various PSC structures. However, conventional fabrication of the mesoscopic structure requires high-temperature heating processes that are considerably time-consuming. Current methods also make it difficult to fabricate integrated or multifunctional devices on the same substrate. Laser processing offers an opportunity to develop a rapid, localized and precise treatment without damaging the substrate or surrounding materials. Here, we demonstrate a rapid and localized one-step fiber laser process to generate both mesoporous and compact TiO2 films on tin-doped indium oxide (ITO) glass. The average PCE obtained for the PSCs by laser irradiation for 1 min, prepared under a high relative humidity of around 60% by a one-step deposition method, is equivalent to that by furnace treatment for 2 h. A fundamental understanding of the laser sintering mechanism using a fiber laser with a wavelength of 1070 nm has also been established. The use of the fiber laser with a wall-plug efficiency of over 40% offers an economically feasible, industrially viable solution to the challenge of rapid fabrication of mesoscopic PSCs and integration of multifunctional devices. In addition, it opens a novel route to manufacture tandem, patterned or aesthetic solar cells in the future.