Title of article
Ultrafast carrier dynamics in PbS quantum dots
Author/Authors
Shen، نويسنده , , Qing and Katayama، نويسنده , , Kenji and Sawada، نويسنده , , Tsuguo and Hachiya، نويسنده , , Sojiro and Toyoda، نويسنده , , Taro، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
5
From page
89
To page
93
Abstract
Ultrafast carrier dynamics in PbS quantum dots (QDs) is characterized using a transient grating technique. In addition to an initial peak, a new peak appears at about 3 ps when the excitation photon energy is greater than 2.7Eg (Eg: band gap between LUMO and HOMO in the QDs). The first peak is considered to be related to hot carriers and the second one is believed to result from multiple exciton generation (MEG). We found that MEG began in as fast as 200 fs and complete around 3 ps. We succeeded in observing the dynamics of MEG occurrence in PbS QDs.
Journal title
Chemical Physics Letters
Serial Year
2012
Journal title
Chemical Physics Letters
Record number
1933422
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