1. Center for Organic Photonics and Electronics Research (OPERA) Kyushu University Nishi, Fukuoka 819‐0395 Japan
2. JST ERATO Adachi Molecular Exciton Engineering Project c/o Center for Organic Photonics and Electronics Research (OPERA) Kyushu University Nishi Fukuoka 819‐0395 Japan
3. International Institute for Carbon Neutral Energy Research (WPI‐I2CNER) Kyushu University Nishi Fukuoka 819‐0395 Japan