title: Quantitative cascade energy transfer in semiconductor thin films.
abstract: In this contribution we report the photophysical study of three organic blend systems comprising [60]PCBM along with different combinations of five extended semiconducting arylacetylenes, i.e. p-[(2-{[m,p-didodecyloxyphenyl]ethynyl}-7-fluorenyl)ethynyl]benzonitrile, 4,7-bis(5-{[m,p-bis(hexyloxy)phenyl]ethynyl}thien-2-yl)-2,1,3-benzothiadiazole, 9,10-bis-[(m,m-bis{[m,m-bis-(hexyloxy)phenyl]ethynyl}phenyl)ethynyl]-anthracene, pseudo-p-[(10-{[m,p-bis-(hexyloxy)phenyl]ethynyl}-9-anthryl[2.2]paracyclophane, and oligo{2,5-bis(hexyloxy)[1,4- phenylene ethynylene]-alt-[9,10-anthraceneethynylene]}, and one semiconducting arylvinylene, i.e. 9,10-bis-{(E)-[m,p-bis(hexyloxy)phenyl]vinyl}-anthracene, that evidenced an efficient quantitative energy transfer from the hypsochromic to the bathochromic species (the potential efficient charge-donor components), useful to extend the collection of sunlight. An interesting emission enhancement in thin films has been observed only for the arylvinylene derivative.
authors.affiliation: Department of Chemistry, Biology and Biotechnology, and Centro di Eccellenza sui Materiali Innovativi Nanostrutturati (CEMIN), University of Perugia, via Elce di Sotto 8, 06123 Perugia, Italy. assunta.marrocchi@unipg.it anna.spalletti@unipg.it.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Flamini
authors.forename: Assunta
authors.initials: A
authors.lastname: Marrocchi
authors.forename: Anna
authors.initials: A
authors.lastname: Spalletti