Guest Editor: Professor Xiaowei Zhan
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871 Research Interests: Design and synthesis of conjugated organics and polymers; Fabrication of organic electronic devices
Special Issue Information
Since the first report in 1995 on bulk heterojunction organic solar cells, fullerene derivatives had become the most widely used electron acceptors in the last 20 years, whereas the efficiency of devices with non-fullerene acceptors was far below that of fullerene counterpart. However, fullerenes have disadvantages such as poor light absorption, limited tunability of energy levels, high cost, and poor morphology stability. These shortcomings have limited the sustainable development in the field of organic solar cells. Since 2015, there have been numerous breakthroughs in non-fullerene acceptors, and device efficiency has rapidly increased from <6% to >12%, which exceeds that of fullerene acceptors. This has also enabled scientists to see the huge potential of organic solar cells, and increasing research groups are joining in studies on non-fullerene acceptors, creating an emerging research frontier.
Chinese scientists have made original and leading contributions to the field of non-fullerene acceptors, created important material systems, invented star molecules, and reported new world record efficiency. “Non-fullerene polymer solar cells” ranked the first place in top 10 research hotspots in chemistry and materials science in 2016. China is leading this research hotspot. According to the Web of Science database, the number of published articles and citations of Chinese scientists in the field of non-fullerene acceptors occupies half of the total number. In particular, the number of published papers and citations by Xiaowei Zhan's group ranked No. 1 in this field.
This special issue intends to publish the representative works of some Chinese researchers in the field of non-fullerene organic solar cells and demonstrate the latest research results of China in this innovative field.
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