Abstract SnO2 (Tin oxide) is one of the most successful electron transport layer (ETL) materials in perovskite solar cells (PSCs) because of its low sintering temperature and simple preparation process. Similarly, carbon-based hole transport material-free PSCs (C-PSCs) have been widely studied because of their excellent stability and low price. Therefore, C-PSCs having SnO2 as ETL can be envisaged as a promising PSCs system for commercial flexible equipment. However, studies on this system are still scarce because of its low power conversion efficiency (PCE). In this paper, the electron lifetime and current (Jsc) of a PSC containing a Li-SnO2/Al2O3 + CH3NH3PbI3/carbon structure are greatly improved by doping lithium into SnO2(Li-SnO2) and sandwiching an Al2O3 interlayer into the Li-SnO2 ETL and CH3NH3PbI3. A PCE of 10.01% is obtained, which is 42.3% higher than a PSC having a SnO2/CH3NH3PbI3/carbon structure. The entire preparation process is very simple and is carried out in an air atmosphere below 200 °C (20–40% humidity).

中文翻译：

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具有 Li+ 掺杂 SnO2 电子传输层和 Al2O3 支架层的碳基钙钛矿太阳能电池的性能增强

摘要 SnO2（氧化锡）具有烧结温度低、制备工艺简单等优点，是钙钛矿太阳能电池（PSC）中最成功的电子传输层（ETL）材料之一。同样，无碳空穴传输材料的 PSCs (C-PSCs) 因其优异的稳定性和低廉的价格而被广泛研究。因此，可以将 SnO2 作为 ETL 的 C-PSCs 设想为一种用于商业柔性设备的有前途的 PSCs 系统。然而，由于其低功率转换效率（PCE），对该系统的研究仍然很少。在本文中，通过将锂掺杂到 SnO2(Li-SnO2) 中并将 Al2O3 夹层夹在 Li-SnO2 中，大大提高了包含 Li-SnO2/Al2O3 + CH3NH3PbI3/碳结构的 PSC 的电子寿命和电流 (Jsc)。 ETL 和 CH3NH3PbI3。获得 10.01% 的 PCE，即 42。比具有 SnO2/CH3NH3PbI3/碳结构的 PSC 高 3%。整个制备过程非常简单，在低于 200 °C（20-40% 湿度）的空气气氛中进行。