| 초록 |
Organic photovoltaics (OPVs) have been of current interest for future solar energy conversion technology with an advantage of low-cost, scalable and sustainable manufacturing. Power conversion efficiencies (PCEs) of the OPVs can be typically increased by the development of novel photoactive layer which consisted of a polymer donor and a small-molecule acceptor. A random, asymmetrical copolymer based on fluorinated bithiophene and 5,6-difluoro-2,1,3-benzothiadiazole was developed and used as polymer donor to achieve high efficiency. The random copolymer design allowed enhanced solubility and photoactive properties of the polymer. In addition, a new fabrication process has been applied to obtain an externally certified PCE of 12.14% that officially surpassed the 12% barrier for the first time. The results demonstrate that the random fluorinated benzothiadiazole polymer is promising for achieving high-performance OPVs. |
