A meeting this week, the 3rd Sungkyun International Solar Forum, held in Sungkyunkwan University, Seoul, organized by Nam-Gyu Park, showed that the progress of organmetal halide perovskites continues and opens many discussions. Now the high efficiency is stabilized, since in addition to results about 15% reported previously by Snaith and Grätzel’s groups, we have observed the 12% report of Sang Il Seok in Nature Photonics, and the report of Nam-Gyu Park of 13.5% at his lab this week. Many groups are working to prepare the solar cell and the average efficiency obtained as record in other labs is about 8%.
Now discussions continue to be focused on the role of TiO2, and the methods of preparation of the perovskite, and its dependence on ambient conditions. Some scientists claim that the TiO2 nanostructure in combination with the perovskite makes the solar cell work better, as discussed in the “bar session” shown below in the picture.
It was also remarked that Dyesol, the veteran company that pioneered the sale of materials for dye-sensitized solar cells, is positioning itself very strongly in the new field of the solid dye solar cell with the perovskite absorber.