A New Record for the Photoelectric Conversion Efficiency of Organic Solar Cells2018.08.13
Recently, the team led by Prof. Yongsheng Chen, Nankai University’s College of Chemistry, made breakthrough in the research of organic solar cells. They have conceived and made materials and devices of the tandem organic solar cell featuring high-efficiency and wide spectral absorption, which have achieved a power conversion efficiency of 17.3%, refreshing the highest world record of organic/polymer solar cell photoelectric conversion efficiency. This new result also facilitates the industrialization of the organic solar cells. In the afternoon of August 9 (EST), the paper on the progress was published on the top international academic journal Science.
Flexibility of organic solar cells and major results of the research
Tandem solar cells not only can overcome the difficult issues, but also take the full advantage of the adjustability of organic and polymeric materials with excellent structure and properties. By using the complementary light absorption of the active materials in the front and rear cells of the tandem solar cell, the sunlight can be more effectively utilized, thereby achieving higher energy conversion efficiency.
The related team member introduced that, according to the model and design principle proposed by the work, it is expected to obtain the energy conversion efficiency similar to that of inorganic materials through further optimization of materials and devices in combination with the diversity and adjustability of the structure of organic polymer materials. Thus providing strong technical support for the industrialization of the organic solar cells.
“Guided by our semi-empirical model, the highest conversion efficiency of organic solar cells (tandem) could reach more than 20% theoretically. This time, after a preliminary trial on the lifespan of the cell, we discovered that the cell’s efficiency only reduced by 4% after a 166-day experiment. In the future, we will continue to design new materials. Allowing for a further attempt to improve the conversion efficiency, we will also carry out systematic trials on the cell’s lifespan and make effort to commercialize the organic solar cells,” said Prof. Yongsheng Chen.
The research was supported by the Ministry of Science and Technology, National Natural Science Foundation of China, Tianjin Science and Technology Commission and Nankai University.
Link to: https://doi.org/10.1126/science.aat2612
Written by Junhui Wu
Edited by Yuchen Shi and Ruoyan Yan