Abstract Flexible perovskite solar cells are arising researchers’ attentions due to their promising potential applications. In this letter, homogeneous and highly crystalline SnO2 nanoparticles are successfully synthesized by a solvothermal method, which are then employed to deposit high quality electron transport layers by spin coating and baking at a temperature as low as 150 °C. The prepared SnO2 layer has a homogenous and flat surface without any pinholes. The resulting flexible perovskite solar cell shows a high power conversion efficiency of 13.90%, which is mainly attributed to the good transmittance, efficient electron extraction and hole blocking ability of the SnO2 electron transport layer.

中文翻译：

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用于柔性钙钛矿太阳能电池应用的高结晶 SnO2 纳米粒子的溶剂热合成

摘要 柔性钙钛矿太阳能电池因其潜在的应用前景而引起研究人员的关注。在这封信中，通过溶剂热法成功合成了均匀且高度结晶的 SnO2 纳米粒子，然后通过旋涂和在低至 150°C 的温度下烘烤来沉积高质量的电子传输层。制备的 SnO2 层具有均匀平坦的表面，没有任何针孔。由此产生的柔性钙钛矿太阳能电池显示出 13.90% 的高功率转换效率，这主要归功于 SnO2 电子传输层良好的透射率、高效的电子提取和空穴阻挡能力。