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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：1782 下载量：249
| 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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