title: Strong electronic coupling and ultrafast electron transfer between PbS quantum dots and TiO2 nanocrystalline films.
abstract: Hot carrier and multiple exciton extractions from lead salt quantum dots (QDs) to TiO(2) single crystals have been reported. Implementing these ideas on practical solar cells likely requires the use of nanocrystalline TiO(2) thin films to enhance the light harvesting efficiency. Here, we report 6.4 ± 0.4 fs electron transfer time from PbS QDs to TiO(2) nanocrystalline thin films, suggesting the possibility of extracting hot carriers and multiple excitons in solar cells based on these materials.
authors.affiliation: Department of Chemistry, Emory University, 1515 Dickey Drive NE, Atlanta, Georgia 30322, USA.
authors.forename: Ye
authors.initials: Y
authors.lastname: Yang
authors.forename: William
authors.initials: W
authors.lastname: Rodríguez-Córdoba
authors.forename: Xu
authors.initials: X
authors.lastname: Xiang
authors.forename: Tianquan
authors.initials: T
authors.lastname: Lian
mesh_terms: D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D004579:Electron Transport; D007854:Lead / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D008567:Membranes, Artificial; D018036:Selenium Compounds; C088065:lead selenide; D007854:Lead