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Sub‐Bandgap Excitation‐Induced Electron Injection from CdSe Quantum Dots to TiO 2 in a Directly Coupled System
Author(s) -
Yoshii Mari,
Kobayashi Hisayoshi,
Tada Hiroaki
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500183
Subject(s) - quantum dot , band gap , excitation , electron , optoelectronics , wide bandgap semiconductor , conduction band , materials science , electron excitation , physics , quantum mechanics
We show that the sub‐bandgap excitation of a directly coupled CdSe quantum dot (QD)–TiO 2 system induces electron injection from CdSe levels to the conduction band of TiO 2 , 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.