1. Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.
2. International Institute for Carbon Neutral Energy Research, Kyushu University, Nishi, Fukuoka 819-0395, Japan.
3. Japan Science and Technology Agency, Exploratory Research for Advanced Technology, Adachi Molecular Exciton Engineering Project, c/o OPERA, Kyushu University, Nishi, Fukuoka 819-0395, Japan.