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 Kyushu University 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. Tokyo Research Center Organic Materials Research Laboratory Tosoh Corporation 2743-1, Hayakawa Ayase Kanagawa 252-1123 Japan