Evidence for the Double Excimer State of conjugated polymer in a liquid solutionK. H. Ibnaouf, S. Prasad, V. Masilamani, M. S. AlSalhi and A. S. AlaamerJ. Eur. Opt. Soc.-Rapid Publ., 8 (2013) 13001DOI: https://doi.org/10.2971/jeos.2013.13001