1. Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization University of Toledo Toledo OH 43606 USA
2. Key Laboratory of Artificial Micro‐ and Nano‐structures of Ministry of Education of China School of Physics and Technology Wuhan University Wuhan 430072 China
3. Chemical and Materials Science Center National Renewable Energy Laboratory Golden CO 80401 USA
4. Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH) University of Heidelberg Im Neuenheimer Feld 282 69120 Heidelberg Germany
5. School of Electronic Science and Engineering Southeast University Nanjing 210096 China