In this research, we examined the impact of solution concentration on the photovoltaic and the material properties of perovskite solar cells (PSCs) obtained from dehydrated Pb-acetate precursors. The perovskite solution was deposited by a one-step spin-coating technique followed by 5 min of thermal annealing on a hotplate at the temperature of 90 °C to form the perovskite active layer. The PSC device structure adopted was the inverted planar architecture. The precursor solution concentrations were varied from 0.7 to 1.1M, with the optimal solution concentration found to be 1.0M. This concentration results in a power conversion efficiency of 12.2%, an open circuit voltage (Voc) of 0.94 V, a short circuit photocurrent density (Jsc) of 20.71 mA/cm², and a fill factor of 62.69%. Our investigations revealed that the precursor solution concentration had a huge effect on the quality of the perovskite film and the photovoltaic properties of the PSCs.

中文翻译：

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前驱体浓度对从脱水醋酸铅前驱体获得的钙钛矿太阳能电池性能的影响

在这项研究中，我们检查了溶液浓度对光伏的影响以及从脱水的醋酸铅前驱物获得的钙钛矿型太阳能电池（PSC）的材料特性。通过一步旋涂技术沉积钙钛矿溶液，然后在电热板上在90°C的温度下进行5分钟的热退火，以形成钙钛矿活性层。所采用的PSC器件结构是倒置平面架构。前体溶液浓度在0.7到1.1M之间变化，最佳溶液浓度为1.0M。该浓度导致功率转换效率为12.2％，开路电压（Voc）为0.94 V，短路光电流密度（Jsc）为20.71 mA / cm ²，填充率为62.69％。我们的研究表明，前体溶液的浓度对钙钛矿薄膜的质量和PSC的光伏性能有很大的影响。