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高效的电子选择层对提高有机金属卤化物基钙钛矿太阳电池的能量转换效率起着至关重要的作用.本文采用低温100°C旋转涂膜和无后续高温烧结的方法制备了高结晶度的纳米氧化锡薄膜,利用瞬态时间分辨荧光光谱测试对SnO_2/CH_3NH_3PbI_3薄膜进行分析发现,这种低温氧化锡薄膜与相同条件下制备的低温氧化钛薄膜相比,具有更高的荧光淬灭和电子抽取能力.电流-电压曲线表明,低温氧化锡基钙钛矿太阳电池具有优异的光电转换性能,其开路电压为0.91 V,短路电流密度为20.73 mA cm~(–2),填充因子为64.25%,其器件光电转换效率达到12.10%,高于低温二氧化钛基器件的光电转换效率7.16%.上述无高温烧结的旋转涂膜方法为制备低温大面积钙钛矿太阳电池提供了一种研究思路.
Efficient electron-selective layer plays an important role in improving the energy conversion efficiency of organometallic halide-based perovskite solar cells.In this paper, high crystallinity was prepared by low temperature 100 ° C spin coating and subsequent high temperature sintering SnO_2 / CH_3NH_3PbI_3 thin films were analyzed by transient time-resolved fluorescence spectroscopy and found that the low-temperature tin oxide films have higher fluorescence quenching and lower fluorescence quenching than the low-temperature titanium oxide films prepared under the same conditions The current-voltage curve shows that the low-temperature tin oxide perovskite solar cell has excellent photoelectric conversion performance with an open circuit voltage of 0.91 V, a short-circuit current density of 20.73 mA cm -2, and a fill factor of 64.25 %, The photoelectric conversion efficiency of the device reached 12.10%, higher than the low-temperature titanium dioxide based device photoelectric conversion efficiency of 7.16%. The above high temperature sintering spin coating method for the preparation of large-area low-temperature perovskite solar cells provide a research idea.