1. Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka, Nishi Fukuoka 819‐0395 Japan
2. Japan Science and Technology Agency (JST) ERATO Adachi Molecular Exciton Engineering Project 744 Motooka, Nishi Fukuoka 819‐0395 Japan
3. International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819‐0395 Japan
4. Institute of Systems Information Technologies and Nanotechnologies (ISIT) Fukuoka Industry‐Academia Symphonicity (FiaS) 4‐1 Kyudaishinmachi, Nishi Fukuoka 819‐0388 Japan
5. Department of Materials Science and Engineering and California NanoSystems Institute University of California Los Angeles CA 90095 USA