Fast electron transfer from PbSe quantum dots to TiO2 | Zendy

Yasuaki Masumoto | Zendy; Hayato Takagi | Zendy; Hikaru Umino | Zendy; Eri Suzumura | Zendy

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Fast electron transfer from PbSe quantum dots to TiO2

Author(s) -

Yasuaki Masumoto,

Hayato Takagi,

Hikaru Umino,

Eri Suzumura

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4729881

Subject(s) - quantum dot , electron transfer , luminescence , materials science , electron , optoelectronics , ultrafast laser spectroscopy , anatase , absorption (acoustics) , photochemistry , nanotechnology , chemistry , optics , photocatalysis , physics , biochemistry , laser , quantum mechanics , composite material , catalysis

Fast electron transfer from PbSe quantum dots (QDs) to the porous anatase TiO2 film was observed in transient absorption and luminescence, when the lowest unoccupied molecular orbital level of PbSe QDs is higher than that of TiO2. In PbSe QDs 2.7 nm in diameter linked to the TiO2 film the bleaching recovery and the luminescence decay shortened to 1 ps and 4.2 ns from 650 ps and 1.3 μs observed in the non-linked PbSe QDs, respectively. The electron transfer from both the quantum state and the localized state in PbSe QDs to TiO2 takes place fast and efficiently

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