title: Photoinduced charge transfer and efficient solar energy conversion in a blend of a red polyfluorene copolymer with CdSe nanoparticles.
abstract: We present measurements of charge transfer and the photovoltaic effect in a blend of the alternating polyfluorene copolymer poly(2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)) with branched CdSe nanoparticles. Quasi-steady-state photoinduced absorption measurements identified a long-lived charged species that formed after photoexcitation at room temperature. Photovoltaic devices based on this blend system showed a spectral response extending to 650 nm and gave a solar power conversion efficiency of 2.4% under Air Mass 1.5 Global (AM1.5G) conditions.
authors.affiliation: Cavendish Laboratory, J. J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom. pw288@cam.ac.uk
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Agnese
authors.initials: A
authors.lastname: Abrusci
authors.forename: Henry M P
authors.initials: HM
authors.lastname: Wong
authors.forename: Mattias
authors.initials: M
authors.lastname: Svensson
authors.forename: Mats R
authors.initials: MR
authors.lastname: Andersson
authors.forename: Neil C
authors.initials: NC
authors.lastname: Greenham
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects; D011211:Electric Power Supplies; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004579:Electron Transport; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005449:Fluorenes / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods; D010777:Photochemistry / Q000295:instrumentation* / Q000379:methods; D018036:Selenium Compounds / Q000737:chemistry* / Q000528:radiation effects; D012993:Solar Energy; D055672:Static Electricity; D014159:Transducers
chemical_list: D019187:Cadmium Compounds; D005449:Fluorenes; D018036:Selenium Compounds; C041509:fluorene; C058667:cadmium selenide