Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People's Republic of China.
Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland.
Science. 2014 Jul 18;345(6194):295-8. doi: 10.1126/science.1254763.
We fabricated a perovskite solar cell that uses a double layer of mesoporous TiO2 and ZrO2 as a scaffold infiltrated with perovskite and does not require a hole-conducting layer. The perovskite was produced by drop-casting a solution of PbI2, methylammonium (MA) iodide, and 5-ammoniumvaleric acid (5-AVA) iodide through a porous carbon film. The 5-AVA templating created mixed-cation perovskite (5-AVA)x(MA)1- xPbI3 crystals with lower defect concentration and better pore filling as well as more complete contact with the TiO2 scaffold, resulting in a longer exciton lifetime and a higher quantum yield for photoinduced charge separation as compared to MAPbI3. The cell achieved a certified power conversion efficiency of 12.8% and was stable for >1000 hours in ambient air under full sunlight.
我们制备了一种钙钛矿太阳能电池，它使用双层介孔 TiO2 和 ZrO2 作为支架，渗透有钙钛矿且不需要空穴传输层。钙钛矿是通过将 PbI2、甲脒（MA）碘化物和 5-氨基戊酸（5-AVA）碘化物的溶液滴涂在多孔碳膜上来制备的。5-AVA 模板形成了具有较低缺陷浓度和更好的孔填充以及与 TiO2 支架更完全接触的混合阳离子钙钛矿（5-AVA）x（MA）1-xPbI3 晶体，与 MAPbI3 相比，激子寿命更长，光致电荷分离的量子产率更高。该电池实现了经过认证的 12.8%的功率转换效率，并且在环境空气中在全阳光照射下稳定>1000 小时。
