title: Characterization and polymerization of thienylphenyl and selenylphenyl amines and their interaction with CdSe quantum dots.
abstract: Hybrid quantum-dot-sensitized solar cells show promising novel optoelectronic properties. An adequate design of such cells requires a deep understanding of the characteristics of each component, including their interactions. In this context, the electrochemical properties of two different hole-transporting materials (HTMs) and their chemical interactions with trioctylphosphine-capped CdSe quantum dots are investigated to evaluate their potential use in hybrid quantum-dot-sensitized solar cells. Tris[4-(thien-2-yl)phenyl]amine (TTPA) and tris[4-(selen-2-yl)phenyl]amine (TSePA) are studied in the solid state as thin films deposited on a conducting substrate. Spectroelectrochemical studies evidence both solid-state electropolymerization and doping. Upon addition of TSePA or partially polymerized TTPA to a colloidal solution of trioctylphosphine-capped CdSe quantum dots, the steady-state photoluminescence is quenched. This suggests that the quantum dots and the HTM strongly interact, probably through an excited-state charge-transfer mechanism. The combination of all these pieces of information indicates that polymerized TTPA and TSePA are potential candidates as HTMs for hybrid quantum-dot-sensitized solar cells.
authors: Institut Universitari d'Electroquímica i Departament de Química Física, Universitat d'Alacant, Alacant, Spain. Teresa.Lana@ua.es
authors: Teresa
authors: T
authors: Lana-Villarreal
authors: Enrique
authors: E
authors: Font-Sanchis
authors: Angela
authors: A
authors: Sastre-Santos
authors: Fernando
authors: F
authors: Fernández-Lázaro
authors: Roberto
authors: R
authors: Gómez
mesh_terms: D000588:Amines / Q000737:chemistry*; D000814:Aniline Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D019187:Cadmium Compounds / Q000737:chemistry*; D055664:Electrochemical Techniques; D016566:Organoselenium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D058105:Polymerization; D045663:Quantum Dots; D011789:Quantum Theory; D018036:Selenium Compounds / Q000737:chemistry*; D012993:Solar Energy; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D000588:Amines; D000814:Aniline Compounds; D019187:Cadmium Compounds; D016566:Organoselenium Compounds; D018036:Selenium Compounds; D013876:Thiophenes; C568060:tris(4-(selen-2-yl)phenyl)amine; C568059:tris(4-(thien-2-yl)phenyl)amine; C058667:cadmium selenide