Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan.
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dong Chuan RD., Shanghai, 200240, China.
Adv Mater. 2017 Jul;29(28). doi: 10.1002/adma.201701073. Epub 2017 May 19.
Solution-processed perovskite (PSC) solar cells have achieved extremely high power conversion efficiencies (PCEs) over 20%, but practical application of this photovoltaic technology requires further advancements on both long-term stability and large-area device demonstration. Here, an additive-engineering strategy is developed to realize a facile and convenient fabrication method of large-area uniform perovskite films composed of large crystal size and low density of defects. The high crystalline quality of the perovskite is found to simultaneously enhance the PCE and the durability of PSCs. By using the simple and widely used methylammonium lead iodide (MAPbI ), a certified PCE of 19.19% is achieved for devices with an aperture area of 1.025 cm , and the high-performing devices can sustain over 80% of the initial PCE after 500 h of thermal aging at 85 °C, which are among the best results of MAPbI -based PSCs so far.
溶液处理的钙钛矿（PSC）太阳能电池已经实现了超过 20%的极高功率转换效率（PCE），但这项光伏技术的实际应用需要在长期稳定性和大面积器件展示方面进一步改进。在这里，开发了一种添加剂工程策略，以实现由大尺寸晶体和低缺陷密度组成的大面积均匀钙钛矿薄膜的简便制造方法。发现钙钛矿的高结晶质量同时提高了 PSC 的 PCE 和耐久性。通过使用简单且广泛使用的碘化甲脒（MAPbI ），对于孔径为 1.025 cm 的器件，实现了 19.19%的认证 PCE，而高性能器件在 85°C 下热老化 500 小时后仍能保持初始 PCE 的 80%以上，这是迄今为止基于 MAPbI 的 PSC 中最好的结果之一。
