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Understanding the Effect of Delay Time of Solvent Washing on the Performances of Perovskite Solar Cells
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-08 00:00:00 , DOI: 10.1021/acsomega.7b01026 Heyi Zhang 1 , Qiaoli Niu 1 , Xiao Tang 1 , Huiping Wang 1 , Wentao Huang 1 , Ruidong Xia 1 , Wenjin Zeng 1 , Jizhong Yao 2 , Buyi Yan 2
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-08 00:00:00 , DOI: 10.1021/acsomega.7b01026 Heyi Zhang 1 , Qiaoli Niu 1 , Xiao Tang 1 , Huiping Wang 1 , Wentao Huang 1 , Ruidong Xia 1 , Wenjin Zeng 1 , Jizhong Yao 2 , Buyi Yan 2
Affiliation
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Uniform and dense perovskite films were realized by the one-step solution-processing method combined with toluene washing. The influence of the delay time applied for toluene washing on the film quality of CH3NH3PbI3 (MAPbI3) was investigated in a comprehensive manner. The optimal delay time was experimentally observed at the critical point when the color of the film changes from transparent to hazy. A detailed X-ray diffraction study suggested that such a color change was caused by the emergence of the MAPbI3 crystal nucleus. This finding provides a convenient method to determine the optimal time accurately. With the optimal delay time, the most uniformly distributed MAPbI3 grains with the largest average grain size and the smoothest surface were obtained. Owing to the realization of homogeneous MAPbI3 films combined with full coverage of perovskite on the substrate achieved by toluene washing at the critical point, open-circuit voltage, short-circuit current, fill factor, and power conversion efficiency of 1.11 V, 18.24 mA/cm2, 77.47, and 15.54% were obtained.
中文翻译：
了解溶剂洗涤的延迟时间对钙钛矿太阳能电池性能的影响
通过一步法溶液加工方法与甲苯洗涤相结合，可以得到均匀而致密的钙钛矿薄膜。施加于CH的膜质量甲苯洗涤的延迟时间的影响3 NH 3碘化铅3（MAPbI 3）以全面的方式进行了研究。通过实验观察到最佳延迟时间是在薄膜的颜色从透明变为浑浊时的临界点。详细的X射线衍射研究表明，这种颜色变化是由MAPbI 3晶核的出现引起的。该发现提供了一种方便的方法，可以准确地确定最佳时间。以最佳的延迟时间，最均匀分布的MAPbI 3获得具有最大平均晶粒尺寸和最光滑表面的晶粒。由于实现了均质的MAPbI 3膜，并通过在临界点进行甲苯洗涤，实现了钙钛矿在基材上的完全覆盖，开路电压，短路电流，填充系数和功率转换效率分别为1.11 V，18.24 mA /厘米2获得，77.47，15.54和％。
更新日期：2017-11-08
中文翻译：
了解溶剂洗涤的延迟时间对钙钛矿太阳能电池性能的影响
通过一步法溶液加工方法与甲苯洗涤相结合，可以得到均匀而致密的钙钛矿薄膜。施加于CH的膜质量甲苯洗涤的延迟时间的影响3 NH 3碘化铅3（MAPbI 3）以全面的方式进行了研究。通过实验观察到最佳延迟时间是在薄膜的颜色从透明变为浑浊时的临界点。详细的X射线衍射研究表明，这种颜色变化是由MAPbI 3晶核的出现引起的。该发现提供了一种方便的方法，可以准确地确定最佳时间。以最佳的延迟时间，最均匀分布的MAPbI 3获得具有最大平均晶粒尺寸和最光滑表面的晶粒。由于实现了均质的MAPbI 3膜，并通过在临界点进行甲苯洗涤，实现了钙钛矿在基材上的完全覆盖，开路电压，短路电流，填充系数和功率转换效率分别为1.11 V，18.24 mA /厘米2获得，77.47，15.54和％。
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