| 초록 |
Halide perovskite solar cells have attracted substantial interest not only from the scientific sector but also from the industrial sector because of their high efficiency and simple fabrication process. However, their conversion efficiency, which researchers had been rapidly improving, has started to approach the upper limit for solar cells fabricated with polycrystalline materials at approximately 23%. In addition, the relatively poor stability of halide perovskite solar cells compared with commercial solar cells remains a significant drawback. Very recently, several research groups have reported perovskite-based multi-junction (tandem) solar cells as a step forward in perovskite solar cell research as the multi-junction structure is practically the only approach that can overcome the theoretical conversion efficiency limit. In addition, the stability of perovskite solar cells has been shown to increase substantially when they are used as the top cell of a tandem solar cell. Here, we discuss the way to achieve highly efficient and stable perovskite-based tandem cells as well as a recent progress. |
