1. Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi‐ku Fukuoka 819‐0395 Japan
2. JST ERATO Adachi Molecular Exciton Engineering Project 744 Motooka Nishi‐ku Fukuoka 819‐0395 Japan
3. Organic Optoelectronics Unit Okinawa Institute of Science and Technology Graduate University 1919‐1 Tancha, Onna‐son, Kunigami‐gun Okinawa 904‐0495 Japan
4. International Institute for Carbon Neutral Energy Research (WPI‐I2CNER) Kyushu University 744 Motooka Nishi‐ku Fukuoka 819‐0395 Japan