Multifunctional MgO Layer in Perovskite Solar Cells
Multifunctional MgO Layer in Perovskite Solar Cells
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钙钛矿太阳能电池中的多功能氧化镁层
DOI：
10.1002/cphc.201500163
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发表时间：
2015-06-08
期刊：
影响因子：
2.9
通讯作者：
Wang, Liduo
中科院分区：
文献类型：
--
作者：
Guo, Xudong;Dong, Haopeng;Wang, Liduo
多功能氧化镁（MgO）层被成功地引入到钙钛矿太阳能电池（PSC），以提高其性能。通过醋酸镁的分解，MgO被包覆在介孔TiO 2的表面上，因此，可以阻止钙钛矿和TiO 2之间的接触。X射线光电子能谱（XPS）和红外光谱（IR）分析表明，MgO改性后TiO 2表面的H2O/羟基吸附量减少。紫外/维斯吸收光谱表明，在紫外光照射下，MgO改性的钙钛矿薄膜的光电性能比未改性的钙钛矿薄膜有明显的提高。除了光电流之外，光电压和填充因子也显示出改性后的增强，这导致电池的总效率从9.6%增加到13.9%。电化学阻抗谱（EIS）证实MgO作为绝缘层，以减少电荷复合。
A multifunctional magnesium oxide (MgO) layer was successfully introduced into perovskite solar cells (PSCs) to enhance their performance. MgO was coated onto the surface of mesoporous TiO2 by the decomposition of magnesium acetate and, therefore, could block contact between the perovskite and TiO2. X-ray photoelectron spectroscopy and infrared spectroscopy showed that the amount of H2O/hydroxyl absorbed on the TiO2 decreased after MgO modification. The UV/Vis absorption spectra of the perovskite with MgO modification revealed an enhanced photoelectric performance compared with that of unmodified perovskite after UV illumination. In addition to the photocurrent, the photovoltage and fill factor also showed an enhancement after modification, which resulted in an increase in the overall efficiency of the cell from 9.6 to 13.9%. Electrochemical impedance spectroscopy (EIS) confirmed that MgO acts as an insulating layer to reduce charge recombination.