Perovskite material is a great visible light absorber in perovskite solar cells (PSCs). PSC has reported power conversion efficiency (PCE) of 22.1%. However, performance instability of the solar device base on this material hampers its commercialization. One of the factors responsible for performance instability in the cell is temperature. In this work, we carried out stability study of perovskite film treated with tertiary butylpyridine (tBP) as a surface modifier. Concentrations of tBP added in perovskite material film were varied and the samples were subjected to temperature degradation test in a temperature-controlled chamber for 120 h. Ultraviolet–visible (UV–Vis) spectrophotometers, Fourier-transform infrared (FT-IR) spectrometers and X-ray diffractometers (XRD) were used to characterize the properties of the temperature-stability-tested samples. The results show that the sample treated with 100 $$\upmu $$μl of tBP has the best resistance to temperature degradation after the duration of the test. The surface-modified perovskite films, with 100 $$\upmu $$μl of tBP, may reduce the degradation of PSCs.

中文翻译：

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叔丁基吡啶对甲基铵碘化铅钙钛矿薄膜稳定性的影响

钙钛矿材料是钙钛矿太阳能电池 (PSC) 中一种很好的可见光吸收剂。PSC 报告的功率转换效率 (PCE) 为 22.1%。然而，基于这种材料的太阳能装置的性能不稳定阻碍了其商业化。导致电池性能不稳定的因素之一是温度。在这项工作中，我们对用叔丁基吡啶 (tBP) 作为表面改性剂处理的钙钛矿薄膜进行了稳定性研究。改变钙钛矿材料膜中添加的 tBP 浓度，并在温控室中对样品进行 120 小时的温度降解试验。紫外-可见（UV-Vis）分光光度计，傅里叶变换红外 (FT-IR) 光谱仪和 X 射线衍射仪 (XRD) 用于表征温度稳定性测试样品的特性。结果表明，经过100 $$\upmu $$μl tBP处理的样品在测试持续时间后具有最好的抗温度降解能力。表面改性的钙钛矿薄膜，含有 100 $$\upmu $$μl 的 tBP，可以减少 PSC 的降解。