Send to

Choose Destination
J Phys Chem Lett. 2012 May 3;3(9):1094-8. doi: 10.1021/jz300275f. Epub 2012 Apr 12.

Effects of Lattice Strain and Band Offset on Electron Transfer Rates in Type-II Nanorod Heterostructures.

Author information

†Department of Materials Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States.
‡Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States.


Type-II nanorod heterostructures (NRHs) exhibit efficient directional charge separation and provide the potential to control this flow of charges through changes in structure and composition. We use transient-absorption spectroscopy to investigate how the magnitude of band offset and lattice strain alters dynamics of photogenerated electrons in CdSe/CdTe type-II NRHs. In the absence of alloying and strain effects, electron transfer occurs in ∼300 fs. Reducing the conduction band offset by means of alloying leads to an even shorter charge-separation time (<200 fs), whereas curved NRHs with pronounced strain exhibit a longer charge-separation time of ∼700 fs.


Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center