At present, the problem of energy crisis and environmental pollution caused by the large-scale use of non-renewable fossil fuels is becoming more and more serious, and the green solar cell technology has gained widespread attention.Among them, organic solar cells are flexible, translucent, easy to prepare large area and colorful And so on. While satisfying people's electricity demand, it can bring more enjoyable visual enjoyment. It has great potential in the fields of portable electronic products and photovoltaic buildings, and has become a research hot spot in the field of new energy.
Chinese Academy of Sciences, Ningbo Institute of Materials Technology and Engineering, led by Ge Ziyi organic photoelectric materials and devices research team made a series of progress in the field of organic solar cells. Following the 2015 wet process can be developed low-cost non-conjugated small molecule electrolyte for Cathode interface layer, break through the bottleneck of 10% single-junction organic solar cell efficiency, continue to carry out in-depth and systematic research in the area of organic solar cell interface control, the development of a series of new non-conjugated interface materials, hyperbranched polymer interface materials and Low-cost environmental interface materials.
Recently, the research team made progress in high efficiency non-fullerene organic solar cells. The design and synthesis of a new multi-membered ring backbone small molecule receptor material ITCN has a good energy level matching with the non-fullerene active layer system And the absorption spectrum of the complementary to obtain a single junction ternary non-fullerene organic solar cell 12.16% energy conversion efficiency related research results to Ternary Nonfullerene Polymer Solar Cells with 12.16% Efficiency by Introducing One Acceptor with Cascading Energy Level and Complementary Absorption , Published in Advanced Materials, and apply for Chinese invention patents.
The research has been funded by the National Natural Science Foundation of China, National Key Research and Development Program, Outstanding Youth Fund of Zhejiang Province, Ningbo Science and Technology Innovation Team, Chinese Academy of Sciences Cross Innovation Team, CAS Key Research Projects and CAS Key International Cooperation Projects.
Figure 1. (a) Absorption spectrum of ITCN, IT-M and PBDB-T, (b) Energy level and charge transition of ITCN / IT-M / PBDB-T photoactive layer system
Figure 2. ITCN / IT-M / PBDB-T ternary non-fullerene organic solar cell efficiency curve
