title: Sub-Bandgap Excitation-Induced Electron Injection from CdSe Quantum Dots to TiO2 in a Directly Coupled System.
abstract: We show that the sub-bandgap excitation of a directly coupled CdSe quantum dot (QD)-TiO2 system induces electron injection from CdSe levels to the conduction band of TiO2 , leading to spectral extension of the light response. We anticipate that this study presents a useful guideline for improving the conversion efficiency of QD-sensitized solar cells.
authors.affiliation: Department of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502 (Japan).
authors.forename: Mari
authors.initials: M
authors.lastname: Yoshii
authors.affiliation: Department of Chemistry and Materials Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585 (Japan).
authors.forename: Hisayoshi
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: Department of Applied Chemistry, School of Science and Engineering, Kinki University, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502 (Japan).
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Tada
keywords: CdSe; TiO2; density functional theory calculation; interfacial electron transfer; quantum dot-sensitize solar cells