title: Performance Enhancement of 3-Mercaptopropionic Acid-Capped CdSe Quantum-Dot Sensitized Solar Cells Incorporating Single-Walled Carbon Nanotubes.
abstract: We fabricated a series of linker-assisted quantum-dot-sensitized solar cells based on the ex situ self-assembly of CdSe quantum dots (QDs) onto TiO2 electrode using sulfide/polysulfide (S(2-)/Sn(2-)) as an electrolyte and Au cathode. Our cell were combined with single-walled carbon nanotubes (SWNTs) by two techniques; One was mixing SWNTs with TiO2 electrode and the other was spraying SWNTs onto Au electrode. Absorption spectra were used to confirm the adsorption of QDs onto TiO2 electrode. Cell performance was measured on samples containing and not-containing SWNTs. Samples mixing SWNTs with TiO2 showed higher cell efficiency, on the while sample spraying SWNTs onto Au electrode showed lower efficiency compared with pristine sample (not-containing SWNTs). Electrochemical impedance spectroscopy analysis suggested that SWNTs can act as either barriers or excellent carrier transfers according their position and mixing method.
authors.forename: Jonghee
authors.initials: J
authors.lastname: Yang
authors.forename: Taehee
authors.initials: T
authors.lastname: Park
authors.forename: Jongtaek
authors.initials: J
authors.lastname: Lee
authors.forename: Junyoung
authors.initials: J
authors.lastname: Lee
authors.forename: Hokyeong
authors.initials: H
authors.lastname: Shin
authors.forename: Whikun
authors.initials: W
authors.lastname: Yi
mesh_terms: D015097:3-Mercaptopropionic Acid / Q000737:chemistry*; D019187:Cadmium Compounds / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D012993:Solar Energy; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D019187:Cadmium Compounds; D037742:Nanotubes, Carbon; D018036:Selenium Compounds; C058667:cadmium selenide; D015097:3-Mercaptopropionic Acid