1. Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 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. Academia-Industry Molecular Systems for Devices Research and Education Center (AIMS), Kyushu University, Nishi, Fukuoka 819-0395, Japan
4. Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, Queensland 4072, Australia
5. School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
6. School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
7. International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, Nishi, Fukuoka 819-0395, Japan