On the Role of Interfaces in Planar-Structured HC(NH2)2PbI3 Perovskite Solar Cells
On the Role of Interfaces in Planar-Structured HC(NH2)2PbI3 Perovskite Solar Cells
复制标题
DOI：
10.1002/cssc.201403442
复制
发表时间：
2015-07-20
期刊：
影响因子：
8.4
通讯作者：
Park, Nam-Gyu
中科院分区：
文献类型：
--
作者：
Seol, Dong-Jin;Lee, Jin-Wook;Park, Nam-Gyu
通过两步沉积工艺制备了平面结构的HC（NH 2）（2）PbI 3（FAPbI（3））钙钛矿太阳能电池。为了研究界面的作用，通过改变HC（NH 2）（2）I浓度来有意地修改钙钛矿形态。随着HC（NH 2）（2）I浓度从58.2降低到40.7mM，沉积的FAPbI（3）的表面和晶粒尺寸变得更粗糙和更大。随着浓度的降低，平均光电流提高，但光电压略有恶化。因此，平均效率从7.82%提高到10.70%，并且在40.7mM下获得最佳效率12.17%。TiO_2/FAPbI（3）界面的光致发光（PL）随浓度的降低而降低，而在FAPbI（3）/螺-MeO_3酮界面则相反。通过关联PL数据和光伏性能，我们得出结论，TiO 2/钙钛矿界面起着决定光电流的关键作用，而钙钛矿/螺MeO 2界面是重要的，在管理光电压。
Planar-structured HC(NH2)(2)PbI3 (FAPbI(3)) perovskite solar cells were prepared via a two-step deposition process. To investigate the role of interface, the perovskite morphology was intentionally modified by varying HC(NH2)(2)I concentration. Surface and grain sizes of the deposited FAPbI(3) became rougher and larger as the HC(NH2)(2)I concentration decreased from 58.2 to 40.7mM. Average photocurrent was improved but photovoltage deteriorated slightly with decreasing concentration. Consequently, the average efficiency was improved from 7.82% to 10.70% and the best efficiency of 12.17% was obtained at 40.7mM. Photoluminescence (PL) at TiO2/FAPbI(3) interface was reduced with decreasing concentration, which was, however, reversed at FAPbI(3)/spiro-MeOTAD one. By correlating PL data and the photovoltaic performance, we concluded that the TiO2/perovskite interface plays a crucial role in determining photocurrent while the perovskite/spiro-MeOTAD interface is important in governing photovoltage.