title: Enhanced photovoltaic performance of a quantum dot-sensitized solar cell using a Nb-doped TiO2 electrode.
abstract: In this work Nb-doped anatase TiO2 nanocrystals are used as the photoanode of quantum-dot-sensitized solar cells. A solar cell with CdS/CdSe quantum dots co-sensitized 2.5 mol% Nb-doped anatase TiO2 nanocrystals can achieve a photovoltaic conversion efficiency of 3.3%, which is almost twice as high as the 1.7% obtained by a cell based on undoped TiO2 nanocrystals. The incident photon-to-current conversion efficiency can reach as high as 91%, which is a record for all quantum-dot-sensitized solar cells. Detailed analysis shows that such an enhancement is due to improved lifetime and diffusion length of electrons in the solar cell.
authors.affiliation: State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang
authors.forename: Ting
authors.initials: T
authors.lastname: You
authors.forename: Wei-Qiao
authors.initials: WQ
authors.lastname: Deng
mesh_terms: D011211:Electric Power Supplies; D009556:Niobium / Q000737:chemistry*; D045663:Quantum Dots; D012993:Solar Energy; D014025:Titanium / Q000737:chemistry*
chemical_list: D009556:Niobium; C009495:titanium dioxide; D014025:Titanium