Triplet Energy Back Transfer in Conjugated Polymers with Pendant Phosphorescent Iridium Complexes – Supporting Information S1 Triplet Energy Back Transfer in Conjugated Polymers with Pendant Phosphorescent Iridium Complexes Nicholas R. Evans, † Lekshmi Sudha Devi, ‡ Chris S. K. Mak, † Scott E. Watkins, †,§ Sofia I. Pascu, † Anna Köhler, ‡,|| Richard H. Friend, ‡ Charlotte K. Williams †,⊥ and Andrew B. Holmes* ,§,⊥ Contribution from Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom, Cavendish Laboratory, Department of Physics, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom, School of Chemistry, University of Melbourne, Victoria 3010, Australia, Institute of Physics, University of Potsdam, Am Neuen Palais, Potsdam 14469, Germany and Department of Chemistry, Imperial College, South Kensington, London, SW7 2AZ, United Kingdom. E-mail: aholmes@unimelb.edu.au