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反溶剂纯化碘化铅用于钙钛矿太阳能电池的研究

发表时间:2018-12-29  浏览量:260  下载量:58
全部作者: 唐书杰,李瑞,张梅,郭敏
作者单位: 北京科技大学冶金与生态工程学院
摘 要: 通过反溶剂纯化方法成功提纯低纯度碘化铅(PbI2)。将PbI2溶于二甲基亚砜(dimethyl sulfoxide,DMSO)后,吸取上清液并向其中加入反溶剂——无水乙醇进行萃取,将萃取得到的淡黄色沉淀(DMSO-PbI2)退火得到纯化后的PbI2. 结果表明,在最优条件下,PbI2的收得率可达81.35%. 对纯化前后的PbI2采用X射线衍射(X-ray diffraction,XRD)、扫描电子显微镜(scanning electron microscopy,SEM)和热重分析/差示扫描量热法(thermogravimetric analysis/differential scanning calorimetry,TG/DSC)分析其微观形貌和热稳定性的变化。结果表明,PbI2的主要杂质——羟基碘化铅(Pb(OH)I)被成功去除,PbI2的热稳定性得到提高。另外,纯化后的PbI2可完全溶于DMSO,其晶体沿[001]和[110]方向生长,长度为1~10 μm. 将纯化后的PbI2和光谱纯的PbI2用于制备钙钛矿太阳能电池,其光电转换效率可分别达到14.71%和14.90%.
关 键 词: 材料合成与加工工艺;反溶剂纯化;PbI2;Pb(OH)I;钙钛矿太阳能电池
Title: Study on the anti-solvent purification of lead iodide for perovskite solar cells
Author: TANG Shujie, LI Rui, ZHANG Mei, GUO Min
Organization: School of Metallurgical and Ecological Engineering, University of Science & Technology Beijing
Abstract: The low-purity lead iodide (PbI2) was successfully purified by the anti-solvent purification method. After PbI2 was dissolved in dimethyl sulfoxide (DMSO), the supernatant was aspirated and the anti-solvent anhydrous ethanol was added thereto for extraction. The obtained pale yellow precipitate (DMSO-PbI2) was annealed to obtain as-purified PbI2. The result showed that the yield of PbI2 reached 81.35% under the optimal condition. PbI2 before and after purification was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis/differential scanning calorimetry (TG/DSC) to analyze the changes of microstructure and thermal stability. The lead hydroxyl iodide [Pb(OH)I] was successfully removed, which was the main impurity of PbI2 and its thermal stability was improved. In addition, the as-purified PbI2 could be soluble in DMSO, completely, and its crystal growth extended in the [001] and [110] directions with a length of 1-10 μm. The as-purified PbI2 and specture PbI2 were used to prepare perovskite solar cells, and the photoelectric conversion efficiency could reach 14.71% and 14.90%, respectively.
Key words: material synthesizing and processing technics; anti-solvent purification; PbI2; Pb(OH)I; perovskite solar cells
发表期数: 2018年12月第24期
引用格式: 唐书杰,李瑞,张梅,等. 反溶剂纯化碘化铅用于钙钛矿太阳能电池的研究[J]. 中国科技论文在线精品论文,2018,11(24):2425-2431.
 
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