title: Heterojunction of hydrophobic poly(1,4-phenylenevinylene) and hydrophilic PEDOT:PSS on hydrophilic CdS nanoparticles.
abstract: Heterojunction of hydrophobic poly(1,4-phenylenevinylene) (PPV) on hydrophilic CdS nanoparticles was successfully prepared by the multi-layering of poly(p-xylene tetrahydrothiophenium chloride) (pre-PPV: precursor of PPV polymer) and poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate) (PEDOT:PSS) in an aqueous solution followed by a thermal treatment. CdS nanoparticles thin films were prepared on tin-doped indium oxide (ITO) by a chemical-bath-deposition method. The CdS surface was hydrophilic with low water contact angle of 15 degrees. Positively charged and water-soluble pre-PPV was used to form multilayers with PEDOT:PSS by a layer-by-layer deposition method. Pre-PPV is easily converted to conjugated PPV polymer by a thermal treatment. The CdS nanoparticles-(PPV/PEDOT:PSS) multilayer films constitute efficient acceptor-sensitizer dyad systems, which generate a photocurrent of 2,660 nA/cm2 under the air mass (AM) 1.5 conditions (I=100 mW/cm2) for sample with 4.5 bilayers.
authors.affiliation: Department of Chemistry, Hanyang University, Haengdang-dong 17, Sungdong-ku, Seoul 133-791, Korea.
authors.forename: Wonjoo
authors.initials: W
authors.lastname: Lee
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Baek
authors.forename: Sun Ki
authors.initials: SK
authors.lastname: Min
authors.forename: Gangri
authors.initials: G
authors.lastname: Cai
authors.forename: Joong Ki
authors.initials: JK
authors.lastname: Lee
authors.forename: Byung Won
authors.initials: BW
authors.lastname: Cho
authors.forename: Soo-Hyoung
authors.initials: SH
authors.lastname: Lee
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Han
mesh_terms: D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010777:Photochemistry / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013440:Sulfides / Q000737:chemistry; D013696:Temperature
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D019187:Cadmium Compounds; D011108:Polymers; D013440:Sulfides; C121383:poly(3,4-ethylene dioxythiophene); D002104:Cadmium; C034939:cadmium sulfide