1. Center for Organic Photonics and Electronics Research (OPERA) Kyushu University Motooka, Nishi Fukuoka 819‐0395 Japan
2. Department of Physical Sciences and Technologies Faculty of Applied Sciences Sabaragamuwa University of Sri Lanka Belihuloya 70140 Sri Lanka
3. International Institute for Carbon‐Neutral Energy Research (WPI‐I 2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819‐0395 Japan