New Organic Solar Cell: Turn off energetic electrons

Technology Daily, Hefei, March 3 The reporter was informed by China Science & Technology University that Professor Jiang Jun, a research group led by Prof. Luo Yi of the National Research Center for Microscale Physical Materials of National Taiwan University, used first-principles calculations and proposed the first organic molecule with adaptive switch Solar cell design, the program has the advantages of low cost, high efficiency, self-adaptation. Related results recently published in the internationally renowned "Physical Chemistry Letters."

For a long time organic photoelectric conversion efficiency of solar cells is not high, compared with inorganic semiconductor solar cells is still a big gap.

In the single-molecule organic solar cell developed in this study, the azobenzene optical switch molecule is inserted into a typical donor-acceptor system to form a donor-optical switch-acceptor system. The first-principles calculations show that , A research system that suppresses charge recombination processes in organic solar cells through clever design and enables efficient charge separation and automatic switching of molecular conductivity. Also, other optical switch molecules and donor-acceptor systems can be used In this compound system.

This design uses small organic molecules as a material to solve the problem that organic solar cells are prone to charge recombination and conductivity can not be switched, and is the world's first self-adaptive switching organic solar cell design.