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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
首发时间：2018-10-19
摘要：通过反溶剂纯化方法成功提纯低纯度碘化铅(pbi2)，pbi2在溶于二甲基亚砜(dmso)中后，吸取上清液并向其中加入反溶剂-无水乙醇进行萃取，将萃取得到淡黄色沉淀(dmso-pbi2)退火得到纯化后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进行x射线衍射(xrd)、扫描电子显微镜(sem)和热重(tg/dsc)表征来分析其微观形貌和热稳定性变化。结果表明pbi2的主要杂质羟基碘化铅(pb(oh)i)被成功去除，其热稳定性得到提高。另外，纯化后pbi2可完全溶于dmso中，其晶体延[001]和[110]方向生长，长度为1-10 um。将纯化后pbi2和光谱级pbi2用于制备钙钛矿太阳能电池，其光电转化效率可分别达到14.71%和14.90%。
关键词： 反溶剂纯化 pbi2 pb(oh)i 钙钛矿太阳能电池
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study on the anti-solvent purification method of lead iodide for perovskite solar cells
abstract：the low-puritylead iodide (pbi2) was purified by the anti-solvent purification method, successfully. after pbi2 was dissolved in dimethyl sulfoxide (dmso), the supernatant was aspirated and the antisolvent-anhydrous ethanol was added thereto for extraction, the obtained pale yellow precipitate (dmso-pbi2) was annealedto obtain as-purified pbi2.the result showed that the yield of pbi2 reach 81.35% under the optimal conditions. the pbi2 was characterized by x-ray diffraction (xrd), scanning electron microscopy (sem) and thermogravimetry (tg/dsc) to analyze the changes of microstructure and thermal stability. the results indicated that the lead hydroxyl iodide (pb(oh)i) was successfully removed, which is the main impurity of pbi2. the pbi2\' thermal stability was improved. in addition, the as-purified pbi2 can be soluble in dmso, completely, and its\' crystal growth was extended in the [001] and [110] direction with a length of 1-10 μm.the as-purified pbi2 and specturepbi2 were used to prepare perovskite solar cells, and its the photoelectric conversion efficiency can reach 14.71% and 14.90%, respectively.
keywords： antisolvent purification pbi2 pb(oh)i perovskite solar cells
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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
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