Bi Dongqin, El-Zohry Ahmed M, Hagfeldt Anders, Boschloo Gerrit
Department of Chemistry-Ångström Laboratory, Uppsala University , Box 532, SE 751 20 Uppsala, Sweden.
ACS Appl Mater Interfaces. 2014 Nov 12;6(21):18751-7. doi: 10.1021/am504320h. Epub 2014 Oct 30.
A two-step wet chemical synthesis method for methylammonium lead(II) triiodide (CH3NH3PbI3) perovskite is further developed for the preparation of highly reproducible solar cells, with the following structure: fluorine-doped tin oxide (FTO)/TiO2 (compact)/TiO2 (mesoporous)/CH3NH3PbI3/spiro-OMeTAD/Ag. The morphology of the perovskite layer could be controlled by careful variation of the processing conditions. Specifically, by modifying the drying process and inclusion of a dichloromethane treatment, more uniform films could be prepared, with longer emission lifetime in the perovskite material and longer electron lifetime in solar cell devices, as well as faster electron transport and enhanced charge collection at the selective contacts. Solar cell efficiencies up to 13.5% were obtained.
一种用于制备碘化甲脒铅（II）（CH3NH3PbI3）钙钛矿的两步湿化学合成方法得到了进一步发展，用于制备具有高度可重复性的太阳能电池，其结构如下：氟掺杂氧化锡（FTO）/二氧化钛（致密）/二氧化钛（介孔）/CH3NH3PbI3/螺环-OMeTAD/银。通过仔细改变加工条件，可以控制钙钛矿层的形态。具体而言，通过改进干燥过程并加入二氯甲烷处理，可以制备出更均匀的薄膜，钙钛矿材料中的发射寿命更长，太阳能电池器件中的电子寿命更长，以及电子传输更快，并在选择性接触处增强电荷收集。获得了高达13.5%的太阳能电池效率。
